From 19f4fc3aee180000fe45952691bbe69dde1d9e95 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Sun, 24 Feb 2013 02:17:03 -0500 Subject: convert sendfile{,64} to COMPAT_SYSCALL_DEFINE Signed-off-by: Al Viro --- arch/mips/kernel/linux32.c | 20 -------------------- arch/mips/kernel/scall64-n32.S | 2 +- arch/mips/kernel/scall64-o32.S | 2 +- 3 files changed, 2 insertions(+), 22 deletions(-) (limited to 'arch/mips/kernel') diff --git a/arch/mips/kernel/linux32.c b/arch/mips/kernel/linux32.c index 8eeee1c860c0..b0cc2a7df59f 100644 --- a/arch/mips/kernel/linux32.c +++ b/arch/mips/kernel/linux32.c @@ -226,26 +226,6 @@ SYSCALL_DEFINE1(32_personality, unsigned long, personality) return ret; } -SYSCALL_DEFINE4(32_sendfile, long, out_fd, long, in_fd, - compat_off_t __user *, offset, s32, count) -{ - mm_segment_t old_fs = get_fs(); - int ret; - off_t of; - - if (offset && get_user(of, offset)) - return -EFAULT; - - set_fs(KERNEL_DS); - ret = sys_sendfile(out_fd, in_fd, offset ? (off_t __user *)&of : NULL, count); - set_fs(old_fs); - - if (offset && put_user(of, offset)) - return -EFAULT; - - return ret; -} - asmlinkage ssize_t sys32_readahead(int fd, u32 pad0, u64 a2, u64 a3, size_t count) { diff --git a/arch/mips/kernel/scall64-n32.S b/arch/mips/kernel/scall64-n32.S index 693d60b0855f..9b4df498fc5b 100644 --- a/arch/mips/kernel/scall64-n32.S +++ b/arch/mips/kernel/scall64-n32.S @@ -143,7 +143,7 @@ EXPORT(sysn32_call_table) PTR compat_sys_setitimer PTR sys_alarm PTR sys_getpid - PTR sys_32_sendfile + PTR compat_sys_sendfile PTR sys_socket /* 6040 */ PTR sys_connect PTR sys_accept diff --git a/arch/mips/kernel/scall64-o32.S b/arch/mips/kernel/scall64-o32.S index af8887f779f1..c1a70e805751 100644 --- a/arch/mips/kernel/scall64-o32.S +++ b/arch/mips/kernel/scall64-o32.S @@ -399,7 +399,7 @@ sys_call_table: PTR sys_capget PTR sys_capset /* 4205 */ PTR compat_sys_sigaltstack - PTR sys_32_sendfile + PTR compat_sys_sendfile PTR sys_ni_syscall PTR sys_ni_syscall PTR sys_mips_mmap2 /* 4210 */ -- cgit v1.2.3 From d5dc77bfeeab0b03a32e3db5e31e2f64605634ab Mon Sep 17 00:00:00 2001 From: Al Viro Date: Mon, 25 Feb 2013 18:42:04 -0500 Subject: consolidate compat lookup_dcookie() Signed-off-by: Al Viro --- arch/mips/kernel/linux32.c | 6 ------ arch/mips/kernel/scall64-o32.S | 2 +- 2 files changed, 1 insertion(+), 7 deletions(-) (limited to 'arch/mips/kernel') diff --git a/arch/mips/kernel/linux32.c b/arch/mips/kernel/linux32.c index b0cc2a7df59f..6852d4876f82 100644 --- a/arch/mips/kernel/linux32.c +++ b/arch/mips/kernel/linux32.c @@ -259,12 +259,6 @@ asmlinkage long sys32_fallocate(int fd, int mode, unsigned offset_a2, merge_64(len_a4, len_a5)); } -asmlinkage long sys32_lookup_dcookie(u32 a0, u32 a1, char __user *buf, - size_t len) -{ - return sys_lookup_dcookie(merge_64(a0, a1), buf, len); -} - SYSCALL_DEFINE6(32_fanotify_mark, int, fanotify_fd, unsigned int, flags, u64, a3, u64, a4, int, dfd, const char __user *, pathname) { diff --git a/arch/mips/kernel/scall64-o32.S b/arch/mips/kernel/scall64-o32.S index c1a70e805751..91c8c6ea7b09 100644 --- a/arch/mips/kernel/scall64-o32.S +++ b/arch/mips/kernel/scall64-o32.S @@ -439,7 +439,7 @@ sys_call_table: PTR compat_sys_io_submit PTR sys_io_cancel /* 4245 */ PTR sys_exit_group - PTR sys32_lookup_dcookie + PTR compat_sys_lookup_dcookie PTR sys_epoll_create PTR sys_epoll_ctl PTR sys_epoll_wait /* 4250 */ -- cgit v1.2.3 From 56e41d3c5aa84d679eebdb3cb8a70b03c5fbd6c3 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Mon, 21 Jan 2013 23:15:25 -0500 Subject: merge compat sys_ipc instances Signed-off-by: Al Viro --- arch/mips/kernel/linux32.c | 69 ------------------------------------------ arch/mips/kernel/scall64-o32.S | 2 +- 2 files changed, 1 insertion(+), 70 deletions(-) (limited to 'arch/mips/kernel') diff --git a/arch/mips/kernel/linux32.c b/arch/mips/kernel/linux32.c index 6852d4876f82..7c57b8d7b255 100644 --- a/arch/mips/kernel/linux32.c +++ b/arch/mips/kernel/linux32.c @@ -119,75 +119,6 @@ SYSCALL_DEFINE6(32_pwrite, unsigned int, fd, const char __user *, buf, return sys_pwrite64(fd, buf, count, merge_64(a4, a5)); } -#ifdef CONFIG_SYSVIPC - -SYSCALL_DEFINE6(32_ipc, u32, call, long, first, long, second, long, third, - unsigned long, ptr, unsigned long, fifth) -{ - int version, err; - - version = call >> 16; /* hack for backward compatibility */ - call &= 0xffff; - - switch (call) { - case SEMOP: - /* struct sembuf is the same on 32 and 64bit :)) */ - err = sys_semtimedop(first, compat_ptr(ptr), second, NULL); - break; - case SEMTIMEDOP: - err = compat_sys_semtimedop(first, compat_ptr(ptr), second, - compat_ptr(fifth)); - break; - case SEMGET: - err = sys_semget(first, second, third); - break; - case SEMCTL: - err = compat_sys_semctl(first, second, third, compat_ptr(ptr)); - break; - case MSGSND: - err = compat_sys_msgsnd(first, second, third, compat_ptr(ptr)); - break; - case MSGRCV: - err = compat_sys_msgrcv(first, second, fifth, third, - version, compat_ptr(ptr)); - break; - case MSGGET: - err = sys_msgget((key_t) first, second); - break; - case MSGCTL: - err = compat_sys_msgctl(first, second, compat_ptr(ptr)); - break; - case SHMAT: - err = compat_sys_shmat(first, second, third, version, - compat_ptr(ptr)); - break; - case SHMDT: - err = sys_shmdt(compat_ptr(ptr)); - break; - case SHMGET: - err = sys_shmget(first, (unsigned)second, third); - break; - case SHMCTL: - err = compat_sys_shmctl(first, second, compat_ptr(ptr)); - break; - default: - err = -EINVAL; - break; - } - - return err; -} - -#else - -SYSCALL_DEFINE6(32_ipc, u32, call, int, first, int, second, int, third, - u32, ptr, u32, fifth) -{ - return -ENOSYS; -} - -#endif /* CONFIG_SYSVIPC */ - #ifdef CONFIG_MIPS32_N32 SYSCALL_DEFINE4(n32_semctl, int, semid, int, semnum, int, cmd, u32, arg) { diff --git a/arch/mips/kernel/scall64-o32.S b/arch/mips/kernel/scall64-o32.S index 91c8c6ea7b09..103bfe570fe8 100644 --- a/arch/mips/kernel/scall64-o32.S +++ b/arch/mips/kernel/scall64-o32.S @@ -309,7 +309,7 @@ sys_call_table: PTR compat_sys_wait4 PTR sys_swapoff /* 4115 */ PTR compat_sys_sysinfo - PTR sys_32_ipc + PTR compat_sys_ipc PTR sys_fsync PTR sys32_sigreturn PTR __sys_clone /* 4120 */ -- cgit v1.2.3 From 0e65a81b105a3f646793d46740ad90fa5c067986 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Sun, 3 Feb 2013 14:36:44 -0500 Subject: get rid of compat_sys_semctl() and friends in case of ARCH_WANT_OLD_COMPAT_IPC Signed-off-by: Al Viro --- arch/mips/kernel/linux32.c | 24 ------------------------ arch/mips/kernel/scall64-n32.S | 6 +++--- 2 files changed, 3 insertions(+), 27 deletions(-) (limited to 'arch/mips/kernel') diff --git a/arch/mips/kernel/linux32.c b/arch/mips/kernel/linux32.c index 7c57b8d7b255..d1d576b765f5 100644 --- a/arch/mips/kernel/linux32.c +++ b/arch/mips/kernel/linux32.c @@ -119,30 +119,6 @@ SYSCALL_DEFINE6(32_pwrite, unsigned int, fd, const char __user *, buf, return sys_pwrite64(fd, buf, count, merge_64(a4, a5)); } -#ifdef CONFIG_MIPS32_N32 -SYSCALL_DEFINE4(n32_semctl, int, semid, int, semnum, int, cmd, u32, arg) -{ - /* compat_sys_semctl expects a pointer to union semun */ - u32 __user *uptr = compat_alloc_user_space(sizeof(u32)); - if (put_user(arg, uptr)) - return -EFAULT; - return compat_sys_semctl(semid, semnum, cmd, uptr); -} - -SYSCALL_DEFINE4(n32_msgsnd, int, msqid, u32, msgp, unsigned int, msgsz, - int, msgflg) -{ - return compat_sys_msgsnd(msqid, msgsz, msgflg, compat_ptr(msgp)); -} - -SYSCALL_DEFINE5(n32_msgrcv, int, msqid, u32, msgp, size_t, msgsz, - int, msgtyp, int, msgflg) -{ - return compat_sys_msgrcv(msqid, msgsz, msgtyp, msgflg, IPC_64, - compat_ptr(msgp)); -} -#endif - SYSCALL_DEFINE1(32_personality, unsigned long, personality) { unsigned int p = personality & 0xffffffff; diff --git a/arch/mips/kernel/scall64-n32.S b/arch/mips/kernel/scall64-n32.S index 9b4df498fc5b..edcb6594e7b5 100644 --- a/arch/mips/kernel/scall64-n32.S +++ b/arch/mips/kernel/scall64-n32.S @@ -168,11 +168,11 @@ EXPORT(sysn32_call_table) PTR sys_newuname PTR sys_semget PTR sys_semop - PTR sys_n32_semctl + PTR compat_sys_semctl PTR sys_shmdt /* 6065 */ PTR sys_msgget - PTR sys_n32_msgsnd - PTR sys_n32_msgrcv + PTR compat_sys_msgsnd + PTR compat_sys_msgrcv PTR compat_sys_msgctl PTR compat_sys_fcntl /* 6070 */ PTR sys_flock -- cgit v1.2.3 From b43a7ffbf33be7e4d3b10b7714ee663ea2c52fe2 Mon Sep 17 00:00:00 2001 From: Viresh Kumar Date: Sun, 24 Mar 2013 11:56:43 +0530 Subject: cpufreq: Notify all policy->cpus in cpufreq_notify_transition() policy->cpus contains all online cpus that have single shared clock line. And their frequencies are always updated together. Many SMP system's cpufreq drivers take care of this in individual drivers but the best place for this code is in cpufreq core. This patch modifies cpufreq_notify_transition() to notify frequency change for all cpus in policy->cpus and hence updates all users of this API. Signed-off-by: Viresh Kumar Acked-by: Stephen Warren Tested-by: Stephen Warren Signed-off-by: Rafael J. Wysocki --- arch/mips/kernel/cpufreq/loongson2_cpufreq.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) (limited to 'arch/mips/kernel') diff --git a/arch/mips/kernel/cpufreq/loongson2_cpufreq.c b/arch/mips/kernel/cpufreq/loongson2_cpufreq.c index 3237c5235f9c..bafda7063f03 100644 --- a/arch/mips/kernel/cpufreq/loongson2_cpufreq.c +++ b/arch/mips/kernel/cpufreq/loongson2_cpufreq.c @@ -80,7 +80,6 @@ static int loongson2_cpufreq_target(struct cpufreq_policy *policy, pr_debug("cpufreq: requested frequency %u Hz\n", target_freq * 1000); - freqs.cpu = cpu; freqs.old = loongson2_cpufreq_get(cpu); freqs.new = freq; freqs.flags = 0; @@ -89,7 +88,7 @@ static int loongson2_cpufreq_target(struct cpufreq_policy *policy, return 0; /* notifiers */ - cpufreq_notify_transition(&freqs, CPUFREQ_PRECHANGE); + cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE); set_cpus_allowed_ptr(current, &cpus_allowed); @@ -97,7 +96,7 @@ static int loongson2_cpufreq_target(struct cpufreq_policy *policy, clk_set_rate(cpuclk, freq); /* notifiers */ - cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE); + cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE); pr_debug("cpufreq: set frequency %u kHz\n", freq); -- cgit v1.2.3 From e9f51837c97d199dfa06ef448797c584755837a8 Mon Sep 17 00:00:00 2001 From: Viresh Kumar Date: Mon, 1 Apr 2013 12:57:46 +0000 Subject: cpufreq: Don't check if cpu is online/offline for cpufreq callbacks cpufreq layer doesn't call cpufreq driver's callback for any offline CPU and so checking that isn't useful. Lets get rid of it. Signed-off-by: Viresh Kumar Acked-by: David S. Miller Signed-off-by: Rafael J. Wysocki --- arch/mips/kernel/cpufreq/loongson2_cpufreq.c | 6 ------ 1 file changed, 6 deletions(-) (limited to 'arch/mips/kernel') diff --git a/arch/mips/kernel/cpufreq/loongson2_cpufreq.c b/arch/mips/kernel/cpufreq/loongson2_cpufreq.c index bafda7063f03..84889573b566 100644 --- a/arch/mips/kernel/cpufreq/loongson2_cpufreq.c +++ b/arch/mips/kernel/cpufreq/loongson2_cpufreq.c @@ -61,9 +61,6 @@ static int loongson2_cpufreq_target(struct cpufreq_policy *policy, struct cpufreq_freqs freqs; unsigned int freq; - if (!cpu_online(cpu)) - return -ENODEV; - cpus_allowed = current->cpus_allowed; set_cpus_allowed_ptr(current, cpumask_of(cpu)); @@ -109,9 +106,6 @@ static int loongson2_cpufreq_cpu_init(struct cpufreq_policy *policy) unsigned long rate; int ret; - if (!cpu_online(policy->cpu)) - return -ENODEV; - cpuclk = clk_get(NULL, "cpu_clk"); if (IS_ERR(cpuclk)) { printk(KERN_ERR "cpufreq: couldn't get CPU clk\n"); -- cgit v1.2.3 From cdbedc61c8d0122ad682815936f0d11df1fe5f57 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Thu, 21 Mar 2013 22:49:52 +0100 Subject: mips: Use generic idle loop Signed-off-by: Thomas Gleixner Cc: Linus Torvalds Cc: Rusty Russell Cc: Paul McKenney Cc: Peter Zijlstra Reviewed-by: Cc: Srivatsa S. Bhat Cc: Magnus Damm Cc: Ralf Baechle Link: http://lkml.kernel.org/r/20130321215234.754954871@linutronix.de Signed-off-by: Thomas Gleixner --- arch/mips/kernel/process.c | 48 +++++++++++++++------------------------------- arch/mips/kernel/smp.c | 2 +- 2 files changed, 16 insertions(+), 34 deletions(-) (limited to 'arch/mips/kernel') diff --git a/arch/mips/kernel/process.c b/arch/mips/kernel/process.c index 3be4405c2d14..cfc742d75b7f 100644 --- a/arch/mips/kernel/process.c +++ b/arch/mips/kernel/process.c @@ -41,44 +41,26 @@ #include #include -/* - * The idle thread. There's no useful work to be done, so just try to conserve - * power and have a low exit latency (ie sit in a loop waiting for somebody to - * say that they'd like to reschedule) - */ -void __noreturn cpu_idle(void) +#ifdef CONFIG_HOTPLUG_CPU +void arch_cpu_idle_dead(void) { - int cpu; - - /* CPU is going idle. */ - cpu = smp_processor_id(); + /* What the heck is this check doing ? */ + if (!cpu_isset(smp_processor_id(), cpu_callin_map)) + play_dead(); +} +#endif - /* endless idle loop with no priority at all */ - while (1) { - tick_nohz_idle_enter(); - rcu_idle_enter(); - while (!need_resched() && cpu_online(cpu)) { +void arch_cpu_idle(void) +{ #ifdef CONFIG_MIPS_MT_SMTC - extern void smtc_idle_loop_hook(void); + extern void smtc_idle_loop_hook(void); - smtc_idle_loop_hook(); + smtc_idle_loop_hook(); #endif - - if (cpu_wait) { - /* Don't trace irqs off for idle */ - stop_critical_timings(); - (*cpu_wait)(); - start_critical_timings(); - } - } -#ifdef CONFIG_HOTPLUG_CPU - if (!cpu_online(cpu) && !cpu_isset(cpu, cpu_callin_map)) - play_dead(); -#endif - rcu_idle_exit(); - tick_nohz_idle_exit(); - schedule_preempt_disabled(); - } + if (cpu_wait) + (*cpu_wait)(); + else + local_irq_enable(); } asmlinkage void ret_from_fork(void); diff --git a/arch/mips/kernel/smp.c b/arch/mips/kernel/smp.c index 66bf4e22d9b9..aee04af213c5 100644 --- a/arch/mips/kernel/smp.c +++ b/arch/mips/kernel/smp.c @@ -139,7 +139,7 @@ asmlinkage __cpuinit void start_secondary(void) WARN_ON_ONCE(!irqs_disabled()); mp_ops->smp_finish(); - cpu_idle(); + cpu_startup_entry(CPUHP_ONLINE); } /* -- cgit v1.2.3 From 7a9989356b23fa2c7731632d3b575c53c1ac8bce Mon Sep 17 00:00:00 2001 From: Viresh Kumar Date: Thu, 4 Apr 2013 12:54:21 +0000 Subject: cpufreq: mips: move cpufreq driver to drivers/cpufreq This patch moves cpufreq driver of MIPS architecture to drivers/cpufreq. Signed-off-by: Viresh Kumar Acked-by: John Crispin Signed-off-by: Rafael J. Wysocki --- arch/mips/kernel/Makefile | 2 - arch/mips/kernel/cpufreq/Kconfig | 41 ----- arch/mips/kernel/cpufreq/Makefile | 5 - arch/mips/kernel/cpufreq/loongson2_cpufreq.c | 248 --------------------------- 4 files changed, 296 deletions(-) delete mode 100644 arch/mips/kernel/cpufreq/Kconfig delete mode 100644 arch/mips/kernel/cpufreq/Makefile delete mode 100644 arch/mips/kernel/cpufreq/loongson2_cpufreq.c (limited to 'arch/mips/kernel') diff --git a/arch/mips/kernel/Makefile b/arch/mips/kernel/Makefile index f81d98f6184c..c69ca653b071 100644 --- a/arch/mips/kernel/Makefile +++ b/arch/mips/kernel/Makefile @@ -92,8 +92,6 @@ CFLAGS_cpu-bugs64.o = $(shell if $(CC) $(KBUILD_CFLAGS) -Wa,-mdaddi -c -o /dev/n obj-$(CONFIG_HAVE_STD_PC_SERIAL_PORT) += 8250-platform.o -obj-$(CONFIG_MIPS_CPUFREQ) += cpufreq/ - obj-$(CONFIG_PERF_EVENTS) += perf_event.o obj-$(CONFIG_HW_PERF_EVENTS) += perf_event_mipsxx.o diff --git a/arch/mips/kernel/cpufreq/Kconfig b/arch/mips/kernel/cpufreq/Kconfig deleted file mode 100644 index 58c601eee6fd..000000000000 --- a/arch/mips/kernel/cpufreq/Kconfig +++ /dev/null @@ -1,41 +0,0 @@ -# -# CPU Frequency scaling -# - -config MIPS_EXTERNAL_TIMER - bool - -config MIPS_CPUFREQ - bool - default y - depends on CPU_SUPPORTS_CPUFREQ && MIPS_EXTERNAL_TIMER - -if MIPS_CPUFREQ - -menu "CPU Frequency scaling" - -source "drivers/cpufreq/Kconfig" - -if CPU_FREQ - -comment "CPUFreq processor drivers" - -config LOONGSON2_CPUFREQ - tristate "Loongson2 CPUFreq Driver" - select CPU_FREQ_TABLE - depends on MIPS_CPUFREQ - help - This option adds a CPUFreq driver for loongson processors which - support software configurable cpu frequency. - - Loongson2F and it's successors support this feature. - - For details, take a look at . - - If in doubt, say N. - -endif # CPU_FREQ - -endmenu - -endif # MIPS_CPUFREQ diff --git a/arch/mips/kernel/cpufreq/Makefile b/arch/mips/kernel/cpufreq/Makefile deleted file mode 100644 index 05a5715ee38c..000000000000 --- a/arch/mips/kernel/cpufreq/Makefile +++ /dev/null @@ -1,5 +0,0 @@ -# -# Makefile for the Linux/MIPS cpufreq. -# - -obj-$(CONFIG_LOONGSON2_CPUFREQ) += loongson2_cpufreq.o diff --git a/arch/mips/kernel/cpufreq/loongson2_cpufreq.c b/arch/mips/kernel/cpufreq/loongson2_cpufreq.c deleted file mode 100644 index 84889573b566..000000000000 --- a/arch/mips/kernel/cpufreq/loongson2_cpufreq.c +++ /dev/null @@ -1,248 +0,0 @@ -/* - * Cpufreq driver for the loongson-2 processors - * - * The 2E revision of loongson processor not support this feature. - * - * Copyright (C) 2006 - 2008 Lemote Inc. & Insititute of Computing Technology - * Author: Yanhua, yanh@lemote.com - * - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file "COPYING" in the main directory of this archive - * for more details. - */ -#include -#include -#include -#include /* set_cpus_allowed() */ -#include -#include - -#include - -#include - -static uint nowait; - -static struct clk *cpuclk; - -static void (*saved_cpu_wait) (void); - -static int loongson2_cpu_freq_notifier(struct notifier_block *nb, - unsigned long val, void *data); - -static struct notifier_block loongson2_cpufreq_notifier_block = { - .notifier_call = loongson2_cpu_freq_notifier -}; - -static int loongson2_cpu_freq_notifier(struct notifier_block *nb, - unsigned long val, void *data) -{ - if (val == CPUFREQ_POSTCHANGE) - current_cpu_data.udelay_val = loops_per_jiffy; - - return 0; -} - -static unsigned int loongson2_cpufreq_get(unsigned int cpu) -{ - return clk_get_rate(cpuclk); -} - -/* - * Here we notify other drivers of the proposed change and the final change. - */ -static int loongson2_cpufreq_target(struct cpufreq_policy *policy, - unsigned int target_freq, - unsigned int relation) -{ - unsigned int cpu = policy->cpu; - unsigned int newstate = 0; - cpumask_t cpus_allowed; - struct cpufreq_freqs freqs; - unsigned int freq; - - cpus_allowed = current->cpus_allowed; - set_cpus_allowed_ptr(current, cpumask_of(cpu)); - - if (cpufreq_frequency_table_target - (policy, &loongson2_clockmod_table[0], target_freq, relation, - &newstate)) - return -EINVAL; - - freq = - ((cpu_clock_freq / 1000) * - loongson2_clockmod_table[newstate].index) / 8; - if (freq < policy->min || freq > policy->max) - return -EINVAL; - - pr_debug("cpufreq: requested frequency %u Hz\n", target_freq * 1000); - - freqs.old = loongson2_cpufreq_get(cpu); - freqs.new = freq; - freqs.flags = 0; - - if (freqs.new == freqs.old) - return 0; - - /* notifiers */ - cpufreq_notify_transition(policy, &freqs, CPUFREQ_PRECHANGE); - - set_cpus_allowed_ptr(current, &cpus_allowed); - - /* setting the cpu frequency */ - clk_set_rate(cpuclk, freq); - - /* notifiers */ - cpufreq_notify_transition(policy, &freqs, CPUFREQ_POSTCHANGE); - - pr_debug("cpufreq: set frequency %u kHz\n", freq); - - return 0; -} - -static int loongson2_cpufreq_cpu_init(struct cpufreq_policy *policy) -{ - int i; - unsigned long rate; - int ret; - - cpuclk = clk_get(NULL, "cpu_clk"); - if (IS_ERR(cpuclk)) { - printk(KERN_ERR "cpufreq: couldn't get CPU clk\n"); - return PTR_ERR(cpuclk); - } - - rate = cpu_clock_freq / 1000; - if (!rate) { - clk_put(cpuclk); - return -EINVAL; - } - ret = clk_set_rate(cpuclk, rate); - if (ret) { - clk_put(cpuclk); - return ret; - } - - /* clock table init */ - for (i = 2; - (loongson2_clockmod_table[i].frequency != CPUFREQ_TABLE_END); - i++) - loongson2_clockmod_table[i].frequency = (rate * i) / 8; - - policy->cur = loongson2_cpufreq_get(policy->cpu); - - cpufreq_frequency_table_get_attr(&loongson2_clockmod_table[0], - policy->cpu); - - return cpufreq_frequency_table_cpuinfo(policy, - &loongson2_clockmod_table[0]); -} - -static int loongson2_cpufreq_verify(struct cpufreq_policy *policy) -{ - return cpufreq_frequency_table_verify(policy, - &loongson2_clockmod_table[0]); -} - -static int loongson2_cpufreq_exit(struct cpufreq_policy *policy) -{ - clk_put(cpuclk); - return 0; -} - -static struct freq_attr *loongson2_table_attr[] = { - &cpufreq_freq_attr_scaling_available_freqs, - NULL, -}; - -static struct cpufreq_driver loongson2_cpufreq_driver = { - .owner = THIS_MODULE, - .name = "loongson2", - .init = loongson2_cpufreq_cpu_init, - .verify = loongson2_cpufreq_verify, - .target = loongson2_cpufreq_target, - .get = loongson2_cpufreq_get, - .exit = loongson2_cpufreq_exit, - .attr = loongson2_table_attr, -}; - -static struct platform_device_id platform_device_ids[] = { - { - .name = "loongson2_cpufreq", - }, - {} -}; - -MODULE_DEVICE_TABLE(platform, platform_device_ids); - -static struct platform_driver platform_driver = { - .driver = { - .name = "loongson2_cpufreq", - .owner = THIS_MODULE, - }, - .id_table = platform_device_ids, -}; - -/* - * This is the simple version of Loongson-2 wait, Maybe we need do this in - * interrupt disabled context. - */ - -static DEFINE_SPINLOCK(loongson2_wait_lock); - -static void loongson2_cpu_wait(void) -{ - unsigned long flags; - u32 cpu_freq; - - spin_lock_irqsave(&loongson2_wait_lock, flags); - cpu_freq = LOONGSON_CHIPCFG0; - LOONGSON_CHIPCFG0 &= ~0x7; /* Put CPU into wait mode */ - LOONGSON_CHIPCFG0 = cpu_freq; /* Restore CPU state */ - spin_unlock_irqrestore(&loongson2_wait_lock, flags); -} - -static int __init cpufreq_init(void) -{ - int ret; - - /* Register platform stuff */ - ret = platform_driver_register(&platform_driver); - if (ret) - return ret; - - pr_info("cpufreq: Loongson-2F CPU frequency driver.\n"); - - cpufreq_register_notifier(&loongson2_cpufreq_notifier_block, - CPUFREQ_TRANSITION_NOTIFIER); - - ret = cpufreq_register_driver(&loongson2_cpufreq_driver); - - if (!ret && !nowait) { - saved_cpu_wait = cpu_wait; - cpu_wait = loongson2_cpu_wait; - } - - return ret; -} - -static void __exit cpufreq_exit(void) -{ - if (!nowait && saved_cpu_wait) - cpu_wait = saved_cpu_wait; - cpufreq_unregister_driver(&loongson2_cpufreq_driver); - cpufreq_unregister_notifier(&loongson2_cpufreq_notifier_block, - CPUFREQ_TRANSITION_NOTIFIER); - - platform_driver_unregister(&platform_driver); -} - -module_init(cpufreq_init); -module_exit(cpufreq_exit); - -module_param(nowait, uint, 0644); -MODULE_PARM_DESC(nowait, "Disable Loongson-2F specific wait"); - -MODULE_AUTHOR("Yanhua "); -MODULE_DESCRIPTION("cpufreq driver for Loongson2F"); -MODULE_LICENSE("GPL"); -- cgit v1.2.3 From 24270156ac94a54cfaa7326375ed44d0902f58c5 Mon Sep 17 00:00:00 2001 From: David Howells Date: Thu, 11 Apr 2013 00:21:15 +0100 Subject: mips: Don't use create_proc_read_entry() Don't use create_proc_read_entry() as that is deprecated, but rather use proc_create_data() and seq_file instead. Signed-off-by: David Howells cc: Ralf Baechle cc: linux-mips@linux-mips.org Signed-off-by: Al Viro --- arch/mips/kernel/smtc-proc.c | 64 ++++++++++++++++++-------------------------- 1 file changed, 26 insertions(+), 38 deletions(-) (limited to 'arch/mips/kernel') diff --git a/arch/mips/kernel/smtc-proc.c b/arch/mips/kernel/smtc-proc.c index aee7c8177b5d..9fb714450e95 100644 --- a/arch/mips/kernel/smtc-proc.c +++ b/arch/mips/kernel/smtc-proc.c @@ -16,6 +16,7 @@ #include #include #include +#include #include @@ -30,51 +31,39 @@ unsigned long selfipis[NR_CPUS]; struct smtc_cpu_proc smtc_cpu_stats[NR_CPUS]; -static struct proc_dir_entry *smtc_stats; - atomic_t smtc_fpu_recoveries; -static int proc_read_smtc(char *page, char **start, off_t off, - int count, int *eof, void *data) +static int smtc_proc_show(struct seq_file *m, void *v) { - int totalen = 0; - int len; int i; extern unsigned long ebase; - len = sprintf(page, "SMTC Status Word: 0x%08x\n", smtc_status); - totalen += len; - page += len; - len = sprintf(page, "Config7: 0x%08x\n", read_c0_config7()); - totalen += len; - page += len; - len = sprintf(page, "EBASE: 0x%08lx\n", ebase); - totalen += len; - page += len; - len = sprintf(page, "Counter Interrupts taken per CPU (TC)\n"); - totalen += len; - page += len; - for (i=0; i < NR_CPUS; i++) { - len = sprintf(page, "%d: %ld\n", i, smtc_cpu_stats[i].timerints); - totalen += len; - page += len; - } - len = sprintf(page, "Self-IPIs by CPU:\n"); - totalen += len; - page += len; - for(i = 0; i < NR_CPUS; i++) { - len = sprintf(page, "%d: %ld\n", i, smtc_cpu_stats[i].selfipis); - totalen += len; - page += len; - } - len = sprintf(page, "%d Recoveries of \"stolen\" FPU\n", - atomic_read(&smtc_fpu_recoveries)); - totalen += len; - page += len; + seq_printf(m, "SMTC Status Word: 0x%08x\n", smtc_status); + seq_printf(m, "Config7: 0x%08x\n", read_c0_config7()); + seq_printf(m, "EBASE: 0x%08lx\n", ebase); + seq_printf(m, "Counter Interrupts taken per CPU (TC)\n"); + for (i=0; i < NR_CPUS; i++) + seq_printf(m, "%d: %ld\n", i, smtc_cpu_stats[i].timerints); + seq_printf(m, "Self-IPIs by CPU:\n"); + for(i = 0; i < NR_CPUS; i++) + seq_printf(m, "%d: %ld\n", i, smtc_cpu_stats[i].selfipis); + seq_printf(m, "%d Recoveries of \"stolen\" FPU\n", + atomic_read(&smtc_fpu_recoveries)); + return 0; +} - return totalen; +static int smtc_proc_open(struct inode *inode, struct file *file) +{ + return single_open(file, smtc_proc_show, NULL); } +static const struct file_operations smtc_proc_fops = { + .open = smtc_proc_open, + .read = seq_read, + .llseek = seq_lseek, + .release = seq_release, +}; + void init_smtc_stats(void) { int i; @@ -86,6 +75,5 @@ void init_smtc_stats(void) atomic_set(&smtc_fpu_recoveries, 0); - smtc_stats = create_proc_read_entry("smtc", 0444, NULL, - proc_read_smtc, NULL); + proc_create("smtc", 0444, NULL, &smtc_proc_fops); } -- cgit v1.2.3 From d0380e6c3c0f6edb986d8798a23acfaf33d5df23 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Mon, 29 Apr 2013 16:17:18 -0700 Subject: early_printk: consolidate random copies of identical code The early console implementations are the same all over the place. Move the print function to kernel/printk and get rid of the copies. [akpm@linux-foundation.org: arch/mips/kernel/early_printk.c needs kernel.h for va_list] [paul.gortmaker@windriver.com: sh4: make the bios early console support depend on EARLY_PRINTK] Signed-off-by: Thomas Gleixner Signed-off-by: Paul Gortmaker Cc: Russell King Acked-by: Mike Frysinger Cc: Michal Simek Cc: Ralf Baechle Cc: Benjamin Herrenschmidt Cc: Paul Mundt Cc: "David S. Miller" Cc: Chris Metcalf Cc: Richard Weinberger Reviewed-by: Ingo Molnar Tested-by: Paul Gortmaker Cc: Geert Uytterhoeven Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/mips/kernel/early_printk.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) (limited to 'arch/mips/kernel') diff --git a/arch/mips/kernel/early_printk.c b/arch/mips/kernel/early_printk.c index 9e6440eaa455..505cb77d1280 100644 --- a/arch/mips/kernel/early_printk.c +++ b/arch/mips/kernel/early_printk.c @@ -7,7 +7,9 @@ * Copyright (C) 2007 MIPS Technologies, Inc. * written by Ralf Baechle (ralf@linux-mips.org) */ +#include #include +#include #include #include @@ -24,20 +26,18 @@ static void early_console_write(struct console *con, const char *s, unsigned n) } } -static struct console early_console = { +static struct console early_console_prom = { .name = "early", .write = early_console_write, .flags = CON_PRINTBUFFER | CON_BOOT, .index = -1 }; -static int early_console_initialized __initdata; - void __init setup_early_printk(void) { - if (early_console_initialized) + if (early_console) return; - early_console_initialized = 1; + early_console = &early_console_prom; - register_console(&early_console); + register_console(&early_console_prom); } -- cgit v1.2.3 From 196779b9b4ce1922afabdc20d0270720603bd46c Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Tue, 30 Apr 2013 15:27:12 -0700 Subject: dump_stack: consolidate dump_stack() implementations and unify their behaviors Both dump_stack() and show_stack() are currently implemented by each architecture. show_stack(NULL, NULL) dumps the backtrace for the current task as does dump_stack(). On some archs, dump_stack() prints extra information - pid, utsname and so on - in addition to the backtrace while the two are identical on other archs. The usages in arch-independent code of the two functions indicate show_stack(NULL, NULL) should print out bare backtrace while dump_stack() is used for debugging purposes when something went wrong, so it does make sense to print additional information on the task which triggered dump_stack(). There's no reason to require archs to implement two separate but mostly identical functions. It leads to unnecessary subtle information. This patch expands the dummy fallback dump_stack() implementation in lib/dump_stack.c such that it prints out debug information (taken from x86) and invokes show_stack(NULL, NULL) and drops arch-specific dump_stack() implementations in all archs except blackfin. Blackfin's dump_stack() does something wonky that I don't understand. Debug information can be printed separately by calling dump_stack_print_info() so that arch-specific dump_stack() implementation can still emit the same debug information. This is used in blackfin. This patch brings the following behavior changes. * On some archs, an extra level in backtrace for show_stack() could be printed. This is because the top frame was determined in dump_stack() on those archs while generic dump_stack() can't do that reliably. It can be compensated by inlining dump_stack() but not sure whether that'd be necessary. * Most archs didn't use to print debug info on dump_stack(). They do now. An example WARN dump follows. WARNING: at kernel/workqueue.c:4841 init_workqueues+0x35/0x505() Hardware name: empty Modules linked in: CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.9.0-rc1-work+ #9 0000000000000009 ffff88007c861e08 ffffffff81c614dc ffff88007c861e48 ffffffff8108f50f ffffffff82228240 0000000000000040 ffffffff8234a03c 0000000000000000 0000000000000000 0000000000000000 ffff88007c861e58 Call Trace: [] dump_stack+0x19/0x1b [] warn_slowpath_common+0x7f/0xc0 [] warn_slowpath_null+0x1a/0x20 [] init_workqueues+0x35/0x505 ... v2: CPU number added to the generic debug info as requested by s390 folks and dropped the s390 specific dump_stack(). This loses %ksp from the debug message which the maintainers think isn't important enough to keep the s390-specific dump_stack() implementation. dump_stack_print_info() is moved to kernel/printk.c from lib/dump_stack.c. Because linkage is per objecct file, dump_stack_print_info() living in the same lib file as generic dump_stack() means that archs which implement custom dump_stack() - at this point, only blackfin - can't use dump_stack_print_info() as that will bring in the generic version of dump_stack() too. v1 The v1 patch broke build on blackfin due to this issue. The build breakage was reported by Fengguang Wu. Signed-off-by: Tejun Heo Acked-by: David S. Miller Acked-by: Vineet Gupta Acked-by: Jesper Nilsson Acked-by: Vineet Gupta Acked-by: Martin Schwidefsky [s390 bits] Cc: Heiko Carstens Cc: Mike Frysinger Cc: Fengguang Wu Cc: Bjorn Helgaas Cc: Sam Ravnborg Acked-by: Richard Kuo [hexagon bits] Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/mips/kernel/traps.c | 13 ------------- 1 file changed, 13 deletions(-) (limited to 'arch/mips/kernel') diff --git a/arch/mips/kernel/traps.c b/arch/mips/kernel/traps.c index c3abb88170fc..b512b28cf786 100644 --- a/arch/mips/kernel/traps.c +++ b/arch/mips/kernel/traps.c @@ -206,19 +206,6 @@ void show_stack(struct task_struct *task, unsigned long *sp) show_stacktrace(task, ®s); } -/* - * The architecture-independent dump_stack generator - */ -void dump_stack(void) -{ - struct pt_regs regs; - - prepare_frametrace(®s); - show_backtrace(current, ®s); -} - -EXPORT_SYMBOL(dump_stack); - static void show_code(unsigned int __user *pc) { long i; -- cgit v1.2.3 From a43cb95d547a061ed5bf1acb28e0f5fd575e26c1 Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Tue, 30 Apr 2013 15:27:17 -0700 Subject: dump_stack: unify debug information printed by show_regs() show_regs() is inherently arch-dependent but it does make sense to print generic debug information and some archs already do albeit in slightly different forms. This patch introduces a generic function to print debug information from show_regs() so that different archs print out the same information and it's much easier to modify what's printed. show_regs_print_info() prints out the same debug info as dump_stack() does plus task and thread_info pointers. * Archs which didn't print debug info now do. alpha, arc, blackfin, c6x, cris, frv, h8300, hexagon, ia64, m32r, metag, microblaze, mn10300, openrisc, parisc, score, sh64, sparc, um, xtensa * Already prints debug info. Replaced with show_regs_print_info(). The printed information is superset of what used to be there. arm, arm64, avr32, mips, powerpc, sh32, tile, unicore32, x86 * s390 is special in that it used to print arch-specific information along with generic debug info. Heiko and Martin think that the arch-specific extra isn't worth keeping s390 specfic implementation. Converted to use the generic version. Note that now all archs print the debug info before actual register dumps. An example BUG() dump follows. kernel BUG at /work/os/work/kernel/workqueue.c:4841! invalid opcode: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC Modules linked in: CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.9.0-rc1-work+ #7 Hardware name: empty empty/S3992, BIOS 080011 10/26/2007 task: ffff88007c85e040 ti: ffff88007c860000 task.ti: ffff88007c860000 RIP: 0010:[] [] init_workqueues+0x4/0x6 RSP: 0000:ffff88007c861ec8 EFLAGS: 00010246 RAX: ffff88007c861fd8 RBX: ffffffff824466a8 RCX: 0000000000000001 RDX: 0000000000000046 RSI: 0000000000000001 RDI: ffffffff8234a07a RBP: ffff88007c861ec8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: ffffffff8234a07a R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff88007dc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b CR2: ffff88015f7ff000 CR3: 00000000021f1000 CR4: 00000000000007f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400 Stack: ffff88007c861ef8 ffffffff81000312 ffffffff824466a8 ffff88007c85e650 0000000000000003 0000000000000000 ffff88007c861f38 ffffffff82335e5d ffff88007c862080 ffffffff8223d8c0 ffff88007c862080 ffffffff81c47760 Call Trace: [] do_one_initcall+0x122/0x170 [] kernel_init_freeable+0x9b/0x1c8 [] ? rest_init+0x140/0x140 [] kernel_init+0xe/0xf0 [] ret_from_fork+0x7c/0xb0 [] ? rest_init+0x140/0x140 ... v2: Typo fix in x86-32. v3: CPU number dropped from show_regs_print_info() as dump_stack_print_info() has been updated to print it. s390 specific implementation dropped as requested by s390 maintainers. Signed-off-by: Tejun Heo Acked-by: David S. Miller Acked-by: Jesper Nilsson Cc: Heiko Carstens Cc: Martin Schwidefsky Cc: Bjorn Helgaas Cc: Fengguang Wu Cc: Mike Frysinger Cc: Vineet Gupta Cc: Sam Ravnborg Acked-by: Chris Metcalf [tile bits] Acked-by: Richard Kuo [hexagon bits] Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/mips/kernel/traps.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'arch/mips/kernel') diff --git a/arch/mips/kernel/traps.c b/arch/mips/kernel/traps.c index b512b28cf786..25225515451f 100644 --- a/arch/mips/kernel/traps.c +++ b/arch/mips/kernel/traps.c @@ -231,7 +231,7 @@ static void __show_regs(const struct pt_regs *regs) unsigned int cause = regs->cp0_cause; int i; - printk("Cpu %d\n", smp_processor_id()); + show_regs_print_info(KERN_DEFAULT); /* * Saved main processor registers -- cgit v1.2.3