Merge branch 'linus' into x86/irqtip-x86-irq-2008-06-16_09.27_Mon

10 files changed, 87 insertions, 50 deletions

diff --git a/arch/mips/kernel/Makefile b/arch/mips/kernel/Makefile
index 45545be3eb86..65e46a6d4178 100644
--- a/arch/mips/kernel/Makefile
+++ b/arch/mips/kernel/Makefile
@@ -30,7 +30,6 @@ obj-$(CONFIG_CPU_LOONGSON2)	+= r4k_fpu.o r4k_switch.o
 obj-$(CONFIG_CPU_MIPS32)	+= r4k_fpu.o r4k_switch.o
 obj-$(CONFIG_CPU_MIPS64)	+= r4k_fpu.o r4k_switch.o
 obj-$(CONFIG_CPU_R3000)		+= r2300_fpu.o r2300_switch.o
-obj-$(CONFIG_CPU_R4000)		+= r4k_fpu.o r4k_switch.o
 obj-$(CONFIG_CPU_R4300)		+= r4k_fpu.o r4k_switch.o
 obj-$(CONFIG_CPU_R4X00)		+= r4k_fpu.o r4k_switch.o
 obj-$(CONFIG_CPU_R5000)		+= r4k_fpu.o r4k_switch.o
@@ -56,9 +55,9 @@ obj-$(CONFIG_MIPS_MT_SMP)	+= smp-mt.o
 obj-$(CONFIG_MIPS_CMP)		+= smp-cmp.o
 obj-$(CONFIG_CPU_MIPSR2)	+= spram.o
 
-obj-$(CONFIG_MIPS_APSP_KSPD)	+= kspd.o
 obj-$(CONFIG_MIPS_VPE_LOADER)	+= vpe.o
 obj-$(CONFIG_MIPS_VPE_APSP_API)	+= rtlx.o
+obj-$(CONFIG_MIPS_APSP_KSPD)	+= kspd.o
 
 obj-$(CONFIG_I8259)		+= i8259.o
 obj-$(CONFIG_IRQ_CPU)		+= irq_cpu.o
diff --git a/arch/mips/kernel/cpu-bugs64.c b/arch/mips/kernel/cpu-bugs64.c
index a1b48af0992f..02b7713cf71c 100644
--- a/arch/mips/kernel/cpu-bugs64.c
+++ b/arch/mips/kernel/cpu-bugs64.c
@@ -38,7 +38,7 @@ static inline void align_mod(const int align, const int mod)
 		".endr\n\t"
 		".set	pop"
 		:
-		: GCC_IMM_ASM(align), GCC_IMM_ASM(mod));
+		: GCC_IMM_ASM() (align), GCC_IMM_ASM() (mod));
 }
 
 static inline void mult_sh_align_mod(long *v1, long *v2, long *w,
diff --git a/arch/mips/kernel/init_task.c b/arch/mips/kernel/init_task.c
index aeda7f58391b..d72487ad7c15 100644
--- a/arch/mips/kernel/init_task.c
+++ b/arch/mips/kernel/init_task.c
@@ -10,7 +10,6 @@
 #include <asm/pgtable.h>
 
 static struct fs_struct init_fs = INIT_FS;
-static struct files_struct init_files = INIT_FILES;
 static struct signal_struct init_signals = INIT_SIGNALS(init_signals);
 static struct sighand_struct init_sighand = INIT_SIGHAND(init_sighand);
 struct mm_struct init_mm = INIT_MM(init_mm);
diff --git a/arch/mips/kernel/irixelf.c b/arch/mips/kernel/irixelf.c
index 290d8e3a664d..469c7237e5ba 100644
--- a/arch/mips/kernel/irixelf.c
+++ b/arch/mips/kernel/irixelf.c
@@ -578,7 +578,7 @@ static inline int map_interpreter(struct elf_phdr *epp, struct elfhdr *ihp,
  * process and the system, here we map the page and fill the
  * structure
  */
-static void irix_map_prda_page(void)
+static int irix_map_prda_page(void)
 {
 	unsigned long v;
 	struct prda *pp;
@@ -587,8 +587,8 @@ static void irix_map_prda_page(void)
 	v =  do_brk(PRDA_ADDRESS, PAGE_SIZE);
 	up_write(&current->mm->mmap_sem);
 
-	if (v < 0)
-		return;
+	if (v != PRDA_ADDRESS)
+		return v;		/* v must be an error code */
 
 	pp = (struct prda *) v;
 	pp->prda_sys.t_pid  = task_pid_vnr(current);
@@ -596,6 +596,8 @@ static void irix_map_prda_page(void)
 	pp->prda_sys.t_rpid = task_pid_vnr(current);
 
 	/* We leave the rest set to zero */
+
+	return 0;
 }
 
 
@@ -781,7 +783,8 @@ static int load_irix_binary(struct linux_binprm * bprm, struct pt_regs * regs)
 	 * IRIX maps a page at 0x200000 which holds some system
 	 * information.  Programs depend on this.
 	 */
-	irix_map_prda_page();
+	if (irix_map_prda_page())
+		goto out_free_dentry;
 
 	padzero(elf_bss);
 
diff --git a/arch/mips/kernel/kspd.c b/arch/mips/kernel/kspd.c
index ceb62dce1c9c..b0591ae0ce56 100644
--- a/arch/mips/kernel/kspd.c
+++ b/arch/mips/kernel/kspd.c
@@ -257,7 +257,7 @@ void sp_work_handle_request(void)
 
 		vcwd = vpe_getcwd(tclimit);
 
- 		/* change to the cwd of the process that loaded the SP program */
+		/* change to cwd of the process that loaded the SP program */
 		old_fs = get_fs();
 		set_fs(KERNEL_DS);
 		sys_chdir(vcwd);
@@ -323,6 +323,9 @@ static void sp_cleanup(void)
 			set >>= 1;
 		}
 	}
+
+	/* Put daemon cwd back to root to avoid umount problems */
+	sys_chdir("/");
 }
 
 static int channel_open = 0;
diff --git a/arch/mips/kernel/rtlx.c b/arch/mips/kernel/rtlx.c
index 0233798f7155..b88f1c18ff4d 100644
--- a/arch/mips/kernel/rtlx.c
+++ b/arch/mips/kernel/rtlx.c
@@ -72,6 +72,15 @@ static void rtlx_dispatch(void)
 static irqreturn_t rtlx_interrupt(int irq, void *dev_id)
 {
 	int i;
+	unsigned int flags, vpeflags;
+
+	/* Ought not to be strictly necessary for SMTC builds */
+	local_irq_save(flags);
+	vpeflags = dvpe();
+	set_c0_status(0x100 << MIPS_CPU_RTLX_IRQ);
+	irq_enable_hazard();
+	evpe(vpeflags);
+	local_irq_restore(flags);
 
 	for (i = 0; i < RTLX_CHANNELS; i++) {
 			wake_up(&channel_wqs[i].lx_queue);
@@ -108,7 +117,8 @@ static void __used dump_rtlx(void)
 static int rtlx_init(struct rtlx_info *rtlxi)
 {
 	if (rtlxi->id != RTLX_ID) {
-		printk(KERN_ERR "no valid RTLX id at 0x%p 0x%lx\n", rtlxi, rtlxi->id);
+		printk(KERN_ERR "no valid RTLX id at 0x%p 0x%lx\n",
+			rtlxi, rtlxi->id);
 		return -ENOEXEC;
 	}
 
@@ -162,18 +172,17 @@ int rtlx_open(int index, int can_sleep)
 
 	if (rtlx == NULL) {
 		if( (p = vpe_get_shared(tclimit)) == NULL) {
-			if (can_sleep) {
-				__wait_event_interruptible(channel_wqs[index].lx_queue,
-				                           (p = vpe_get_shared(tclimit)),
-				                           ret);
-				if (ret)
-					goto out_fail;
-			} else {
-				printk(KERN_DEBUG "No SP program loaded, and device "
-					"opened with O_NONBLOCK\n");
-				ret = -ENOSYS;
+		    if (can_sleep) {
+			__wait_event_interruptible(channel_wqs[index].lx_queue,
+				(p = vpe_get_shared(tclimit)), ret);
+			if (ret)
 				goto out_fail;
-			}
+		    } else {
+			printk(KERN_DEBUG "No SP program loaded, and device "
+					"opened with O_NONBLOCK\n");
+			ret = -ENOSYS;
+			goto out_fail;
+		    }
 		}
 
 		smp_rmb();
@@ -182,7 +191,9 @@ int rtlx_open(int index, int can_sleep)
 				DEFINE_WAIT(wait);
 
 				for (;;) {
-					prepare_to_wait(&channel_wqs[index].lx_queue, &wait, TASK_INTERRUPTIBLE);
+					prepare_to_wait(
+						&channel_wqs[index].lx_queue,
+						&wait, TASK_INTERRUPTIBLE);
 					smp_rmb();
 					if (*p != NULL)
 						break;
@@ -195,7 +206,7 @@ int rtlx_open(int index, int can_sleep)
 				}
 				finish_wait(&channel_wqs[index].lx_queue, &wait);
 			} else {
-				printk(" *vpe_get_shared is NULL. "
+				pr_err(" *vpe_get_shared is NULL. "
 				       "Has an SP program been loaded?\n");
 				ret = -ENOSYS;
 				goto out_fail;
@@ -203,8 +214,9 @@ int rtlx_open(int index, int can_sleep)
 		}
 
 		if ((unsigned int)*p < KSEG0) {
-			printk(KERN_WARNING "vpe_get_shared returned an invalid pointer "
-			       "maybe an error code %d\n", (int)*p);
+			printk(KERN_WARNING "vpe_get_shared returned an "
+			       "invalid pointer maybe an error code %d\n",
+			       (int)*p);
 			ret = -ENOSYS;
 			goto out_fail;
 		}
@@ -232,6 +244,10 @@ out_ret:
 
 int rtlx_release(int index)
 {
+	if (rtlx == NULL) {
+		pr_err("rtlx_release() with null rtlx\n");
+		return 0;
+	}
 	rtlx->channel[index].lx_state = RTLX_STATE_UNUSED;
 	return 0;
 }
@@ -251,8 +267,8 @@ unsigned int rtlx_read_poll(int index, int can_sleep)
 			int ret = 0;
 
 			__wait_event_interruptible(channel_wqs[index].lx_queue,
-			                           chan->lx_read != chan->lx_write || sp_stopping,
-			                           ret);
+				(chan->lx_read != chan->lx_write) ||
+				sp_stopping, ret);
 			if (ret)
 				return ret;
 
@@ -282,7 +298,9 @@ static inline int write_spacefree(int read, int write, int size)
 unsigned int rtlx_write_poll(int index)
 {
 	struct rtlx_channel *chan = &rtlx->channel[index];
-	return write_spacefree(chan->rt_read, chan->rt_write, chan->buffer_size);
+
+	return write_spacefree(chan->rt_read, chan->rt_write,
+				chan->buffer_size);
 }
 
 ssize_t rtlx_read(int index, void __user *buff, size_t count)
@@ -344,8 +362,8 @@ ssize_t rtlx_write(int index, const void __user *buffer, size_t count)
 	rt_read = rt->rt_read;
 
 	/* total number of bytes to copy */
-	count = min(count,
-		    (size_t)write_spacefree(rt_read, rt->rt_write, rt->buffer_size));
+	count = min(count, (size_t)write_spacefree(rt_read, rt->rt_write,
+							rt->buffer_size));
 
 	/* first bit from write pointer to the end of the buffer, or count */
 	fl = min(count, (size_t) rt->buffer_size - rt->rt_write);
@@ -514,6 +532,11 @@ static int __init rtlx_module_init(void)
 
 	if (cpu_has_vint)
 		set_vi_handler(MIPS_CPU_RTLX_IRQ, rtlx_dispatch);
+	else {
+		pr_err("APRP RTLX init on non-vectored-interrupt processor\n");
+		err = -ENODEV;
+		goto out_chrdev;
+	}
 
 	rtlx_irq.dev_id = rtlx;
 	setup_irq(rtlx_irq_num, &rtlx_irq);
diff --git a/arch/mips/kernel/setup.c b/arch/mips/kernel/setup.c
index 39f3dfe134fb..c6a063b2a0d9 100644
--- a/arch/mips/kernel/setup.c
+++ b/arch/mips/kernel/setup.c
@@ -331,6 +331,7 @@ static void __init bootmem_init(void)
 	/*
 	 * Determine low and high memory ranges
 	 */
+	max_pfn = max_low_pfn;
 	if (max_low_pfn > PFN_DOWN(HIGHMEM_START)) {
 #ifdef CONFIG_HIGHMEM
 		highstart_pfn = PFN_DOWN(HIGHMEM_START);
diff --git a/arch/mips/kernel/smp.c b/arch/mips/kernel/smp.c
index 33780cc61ce9..63370cdd3c90 100644
--- a/arch/mips/kernel/smp.c
+++ b/arch/mips/kernel/smp.c
@@ -87,8 +87,8 @@ struct plat_smp_ops *mp_ops;
 
 __cpuinit void register_smp_ops(struct plat_smp_ops *ops)
 {
-	if (ops)
-		printk(KERN_WARNING "Overriding previous set SMP ops\n");
+	if (mp_ops)
+		printk(KERN_WARNING "Overriding previously set SMP ops\n");
 
 	mp_ops = ops;
 }
diff --git a/arch/mips/kernel/traps.c b/arch/mips/kernel/traps.c
index cb8b0e2c7954..f9165d1a17bf 100644
--- a/arch/mips/kernel/traps.c
+++ b/arch/mips/kernel/traps.c
@@ -88,15 +88,17 @@ static void show_raw_backtrace(unsigned long reg29)
 #ifdef CONFIG_KALLSYMS
 	printk("\n");
 #endif
-#define IS_KVA01(a) ((((unsigned int)a) & 0xc0000000) == 0x80000000)
-	if (IS_KVA01(sp)) {
-		while (!kstack_end(sp)) {
-			addr = *sp++;
-			if (__kernel_text_address(addr))
-				print_ip_sym(addr);
+	while (!kstack_end(sp)) {
+		unsigned long __user *p =
+			(unsigned long __user *)(unsigned long)sp++;
+		if (__get_user(addr, p)) {
+			printk(" (Bad stack address)");
+			break;
 		}
-		printk("\n");
+		if (__kernel_text_address(addr))
+			print_ip_sym(addr);
 	}
+	printk("\n");
 }
 
 #ifdef CONFIG_KALLSYMS
diff --git a/arch/mips/kernel/vpe.c b/arch/mips/kernel/vpe.c
index 39804c584edd..2794501ff302 100644
--- a/arch/mips/kernel/vpe.c
+++ b/arch/mips/kernel/vpe.c
@@ -269,7 +269,7 @@ static void *alloc_progmem(unsigned long len)
 	 * This means you must tell Linux to use less memory than you
 	 * physically have, for example by passing a mem= boot argument.
 	 */
-	addr = pfn_to_kaddr(max_pfn);
+	addr = pfn_to_kaddr(max_low_pfn);
 	memset(addr, 0, len);
 #else
 	/* simple grab some mem for now */
@@ -781,10 +781,15 @@ static int vpe_run(struct vpe * v)
 	/* take system out of configuration state */
 	clear_c0_mvpcontrol(MVPCONTROL_VPC);
 
+	/*
+	 * SMTC/SMVP kernels manage VPE enable independently,
+	 * but uniprocessor kernels need to turn it on, even
+	 * if that wasn't the pre-dvpe() state.
+	 */
 #ifdef CONFIG_SMP
-	evpe(EVPE_ENABLE);
-#else
 	evpe(vpeflags);
+#else
+	evpe(EVPE_ENABLE);
 #endif
 	emt(dmt_flag);
 	local_irq_restore(flags);
@@ -840,7 +845,7 @@ static int vpe_elfload(struct vpe * v)
 
 	/* Sanity checks against insmoding binaries or wrong arch,
 	   weird elf version */
-	if (memcmp(hdr->e_ident, ELFMAG, 4) != 0
+	if (memcmp(hdr->e_ident, ELFMAG, SELFMAG) != 0
 	    || (hdr->e_type != ET_REL && hdr->e_type != ET_EXEC)
 	    || !elf_check_arch(hdr)
 	    || hdr->e_shentsize != sizeof(*sechdrs)) {
@@ -947,12 +952,14 @@ static int vpe_elfload(struct vpe * v)
 		struct elf_phdr *phdr = (struct elf_phdr *) ((char *)hdr + hdr->e_phoff);
 
 		for (i = 0; i < hdr->e_phnum; i++) {
-			if (phdr->p_type != PT_LOAD)
-				continue;
-
-			memcpy((void *)phdr->p_paddr, (char *)hdr + phdr->p_offset, phdr->p_filesz);
-			memset((void *)phdr->p_paddr + phdr->p_filesz, 0, phdr->p_memsz - phdr->p_filesz);
-			phdr++;
+			if (phdr->p_type == PT_LOAD) {
+				memcpy((void *)phdr->p_paddr,
+				       (char *)hdr + phdr->p_offset,
+				       phdr->p_filesz);
+				memset((void *)phdr->p_paddr + phdr->p_filesz,
+				       0, phdr->p_memsz - phdr->p_filesz);
+		    }
+		    phdr++;
 		}
 
 		for (i = 0; i < hdr->e_shnum; i++) {
@@ -1107,7 +1114,7 @@ static int vpe_release(struct inode *inode, struct file *filp)
 		return -ENODEV;
 
 	hdr = (Elf_Ehdr *) v->pbuffer;
-	if (memcmp(hdr->e_ident, ELFMAG, 4) == 0) {
+	if (memcmp(hdr->e_ident, ELFMAG, SELFMAG) == 0) {
 		if (vpe_elfload(v) >= 0) {
 			vpe_run(v);
 		} else {