12 files changed, 40 insertions, 213 deletions

diff --git a/arch/s390/kernel/Makefile b/arch/s390/kernel/Makefile
index 1386fcaf4ef6..4bb2a4656163 100644
--- a/arch/s390/kernel/Makefile
+++ b/arch/s390/kernel/Makefile
@@ -30,7 +30,7 @@ CFLAGS_sysinfo.o += -Iinclude/math-emu -Iarch/s390/math-emu -w
 
 obj-y	:= bitmap.o traps.o time.o process.o base.o early.o setup.o vtime.o
 obj-y	+= processor.o sys_s390.o ptrace.o signal.o cpcmd.o ebcdic.o nmi.o
-obj-y	+= debug.o irq.o ipl.o dis.o diag.o mem_detect.o sclp.o vdso.o
+obj-y	+= debug.o irq.o ipl.o dis.o diag.o sclp.o vdso.o
 obj-y	+= sysinfo.o jump_label.o lgr.o os_info.o machine_kexec.o pgm_check.o
 obj-y	+= dumpstack.o
 
diff --git a/arch/s390/kernel/compat_wrapper.S b/arch/s390/kernel/compat_wrapper.S
index 2d72d9e96c15..9cb1b975b353 100644
--- a/arch/s390/kernel/compat_wrapper.S
+++ b/arch/s390/kernel/compat_wrapper.S
@@ -793,10 +793,6 @@ ENTRY(sys32_stime_wrapper)
 	llgtr	%r2,%r2			# long *
 	jg	compat_sys_stime	# branch to system call
 
-ENTRY(sys32_sysctl_wrapper)
-	llgtr	%r2,%r2 		# struct compat_sysctl_args *
-	jg	compat_sys_sysctl
-
 ENTRY(sys32_fstat64_wrapper)
 	llgfr	%r2,%r2			# unsigned long
 	llgtr	%r3,%r3			# struct stat64 *
@@ -1349,15 +1345,6 @@ ENTRY(sys_fanotify_init_wrapper)
 	llgfr	%r3,%r3			# unsigned int
 	jg	sys_fanotify_init	# branch to system call
 
-ENTRY(sys_fanotify_mark_wrapper)
-	lgfr	%r2,%r2			# int
-	llgfr	%r3,%r3			# unsigned int
-	sllg	%r4,%r4,32		# get high word of 64bit mask
-	lr	%r4,%r5			# get low word of 64bit mask
-	llgfr	%r5,%r6			# unsigned int
-	llgt	%r6,164(%r15)		# char *
-	jg	sys_fanotify_mark	# branch to system call
-
 ENTRY(sys_prlimit64_wrapper)
 	lgfr	%r2,%r2			# pid_t
 	llgfr	%r3,%r3			# unsigned int
diff --git a/arch/s390/kernel/crash_dump.c b/arch/s390/kernel/crash_dump.c
index fb8d8781a011..f703d91bf720 100644
--- a/arch/s390/kernel/crash_dump.c
+++ b/arch/s390/kernel/crash_dump.c
@@ -88,8 +88,8 @@ static struct mem_chunk *get_memory_layout(void)
 	struct mem_chunk *chunk_array;
 
 	chunk_array = kzalloc_panic(MEMORY_CHUNKS * sizeof(struct mem_chunk));
-	detect_memory_layout(chunk_array);
-	create_mem_hole(chunk_array, OLDMEM_BASE, OLDMEM_SIZE, CHUNK_CRASHK);
+	detect_memory_layout(chunk_array, 0);
+	create_mem_hole(chunk_array, OLDMEM_BASE, OLDMEM_SIZE);
 	return chunk_array;
 }
 
@@ -344,7 +344,7 @@ static int loads_init(Elf64_Phdr *phdr, u64 loads_offset)
 	for (i = 0; i < MEMORY_CHUNKS; i++) {
 		mem_chunk = &chunk_array[i];
 		if (mem_chunk->size == 0)
-			break;
+			continue;
 		if (chunk_array[i].type != CHUNK_READ_WRITE &&
 		    chunk_array[i].type != CHUNK_READ_ONLY)
 			continue;
diff --git a/arch/s390/kernel/dis.c b/arch/s390/kernel/dis.c
index 7f4a4a8c847c..be87d3e05a5b 100644
--- a/arch/s390/kernel/dis.c
+++ b/arch/s390/kernel/dis.c
@@ -1862,6 +1862,8 @@ void print_fn_code(unsigned char *code, unsigned long len)
 	while (len) {
 		ptr = buffer;
 		opsize = insn_length(*code);
+		if (opsize > len)
+			break;
 		ptr += sprintf(ptr, "%p: ", code);
 		for (i = 0; i < opsize; i++)
 			ptr += sprintf(ptr, "%02x", code[i]);
diff --git a/arch/s390/kernel/early.c b/arch/s390/kernel/early.c
index bda011e2f8ae..dc8770d7173c 100644
--- a/arch/s390/kernel/early.c
+++ b/arch/s390/kernel/early.c
@@ -482,7 +482,6 @@ void __init startup_init(void)
 	detect_machine_facilities();
 	setup_topology();
 	sclp_facilities_detect();
-	detect_memory_layout(memory_chunk);
 #ifdef CONFIG_DYNAMIC_FTRACE
 	S390_lowcore.ftrace_func = (unsigned long)ftrace_caller;
 #endif
diff --git a/arch/s390/kernel/ftrace.c b/arch/s390/kernel/ftrace.c
index 78bdf0e5dff7..e3043aef87a9 100644
--- a/arch/s390/kernel/ftrace.c
+++ b/arch/s390/kernel/ftrace.c
@@ -16,12 +16,6 @@
 #include <trace/syscall.h>
 #include <asm/asm-offsets.h>
 
-#ifdef CONFIG_64BIT
-#define MCOUNT_OFFSET_RET 12
-#else
-#define MCOUNT_OFFSET_RET 22
-#endif
-
 #ifdef CONFIG_DYNAMIC_FTRACE
 
 void ftrace_disable_code(void);
@@ -155,9 +149,10 @@ unsigned long __kprobes prepare_ftrace_return(unsigned long parent,
 
 	if (unlikely(atomic_read(&current->tracing_graph_pause)))
 		goto out;
+	ip = (ip & PSW_ADDR_INSN) - MCOUNT_INSN_SIZE;
 	if (ftrace_push_return_trace(parent, ip, &trace.depth, 0) == -EBUSY)
 		goto out;
-	trace.func = (ip & PSW_ADDR_INSN) - MCOUNT_OFFSET_RET;
+	trace.func = ip;
 	/* Only trace if the calling function expects to. */
 	if (!ftrace_graph_entry(&trace)) {
 		current->curr_ret_stack--;
diff --git a/arch/s390/kernel/mcount.S b/arch/s390/kernel/mcount.S
index 4567ce20d900..08dcf21cb8df 100644
--- a/arch/s390/kernel/mcount.S
+++ b/arch/s390/kernel/mcount.S
@@ -7,6 +7,7 @@
 
 #include <linux/linkage.h>
 #include <asm/asm-offsets.h>
+#include <asm/ftrace.h>
 
 	.section .kprobes.text, "ax"
 
@@ -33,6 +34,7 @@ ENTRY(ftrace_caller)
 	la	%r2,0(%r14)
 	st	%r0,__SF_BACKCHAIN(%r15)
 	la	%r3,0(%r3)
+	ahi	%r2,-MCOUNT_INSN_SIZE
 	l	%r14,0b-0b(%r1)
 	l	%r14,0(%r14)
 	basr	%r14,%r14
diff --git a/arch/s390/kernel/mcount64.S b/arch/s390/kernel/mcount64.S
index 11332193db30..1c52eae3396a 100644
--- a/arch/s390/kernel/mcount64.S
+++ b/arch/s390/kernel/mcount64.S
@@ -7,6 +7,7 @@
 
 #include <linux/linkage.h>
 #include <asm/asm-offsets.h>
+#include <asm/ftrace.h>
 
 	.section .kprobes.text, "ax"
 
@@ -29,6 +30,7 @@ ENTRY(ftrace_caller)
 	stg	%r1,__SF_BACKCHAIN(%r15)
 	lgr	%r2,%r14
 	lg	%r3,168(%r15)
+	aghi	%r2,-MCOUNT_INSN_SIZE
 	larl	%r14,ftrace_trace_function
 	lg	%r14,0(%r14)
 	basr	%r14,%r14
diff --git a/arch/s390/kernel/mem_detect.c b/arch/s390/kernel/mem_detect.c
deleted file mode 100644
index 22d502e885ed..000000000000
--- a/arch/s390/kernel/mem_detect.c
+++ /dev/null
@@ -1,145 +0,0 @@
-/*
- * Copyright IBM Corp. 2008, 2009
- *
- * Author(s): Heiko Carstens <heiko.carstens@de.ibm.com>
- */
-
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <asm/ipl.h>
-#include <asm/sclp.h>
-#include <asm/setup.h>
-
-#define ADDR2G (1ULL << 31)
-
-static void find_memory_chunks(struct mem_chunk chunk[])
-{
-	unsigned long long memsize, rnmax, rzm;
-	unsigned long addr = 0, size;
-	int i = 0, type;
-
-	rzm = sclp_get_rzm();
-	rnmax = sclp_get_rnmax();
-	memsize = rzm * rnmax;
-	if (!rzm)
-		rzm = 1ULL << 17;
-	if (sizeof(long) == 4) {
-		rzm = min(ADDR2G, rzm);
-		memsize = memsize ? min(ADDR2G, memsize) : ADDR2G;
-	}
-	do {
-		size = 0;
-		type = tprot(addr);
-		do {
-			size += rzm;
-			if (memsize && addr + size >= memsize)
-				break;
-		} while (type == tprot(addr + size));
-		if (type == CHUNK_READ_WRITE || type == CHUNK_READ_ONLY) {
-			chunk[i].addr = addr;
-			chunk[i].size = size;
-			chunk[i].type = type;
-			i++;
-		}
-		addr += size;
-	} while (addr < memsize && i < MEMORY_CHUNKS);
-}
-
-void detect_memory_layout(struct mem_chunk chunk[])
-{
-	unsigned long flags, cr0;
-
-	memset(chunk, 0, MEMORY_CHUNKS * sizeof(struct mem_chunk));
-	/* Disable IRQs, DAT and low address protection so tprot does the
-	 * right thing and we don't get scheduled away with low address
-	 * protection disabled.
-	 */
-	flags = __arch_local_irq_stnsm(0xf8);
-	__ctl_store(cr0, 0, 0);
-	__ctl_clear_bit(0, 28);
-	find_memory_chunks(chunk);
-	__ctl_load(cr0, 0, 0);
-	arch_local_irq_restore(flags);
-}
-EXPORT_SYMBOL(detect_memory_layout);
-
-/*
- * Move memory chunks array from index "from" to index "to"
- */
-static void mem_chunk_move(struct mem_chunk chunk[], int to, int from)
-{
-	int cnt = MEMORY_CHUNKS - to;
-
-	memmove(&chunk[to], &chunk[from], cnt * sizeof(struct mem_chunk));
-}
-
-/*
- * Initialize memory chunk
- */
-static void mem_chunk_init(struct mem_chunk *chunk, unsigned long addr,
-			   unsigned long size, int type)
-{
-	chunk->type = type;
-	chunk->addr = addr;
-	chunk->size = size;
-}
-
-/*
- * Create memory hole with given address, size, and type
- */
-void create_mem_hole(struct mem_chunk chunk[], unsigned long addr,
-		     unsigned long size, int type)
-{
-	unsigned long lh_start, lh_end, lh_size, ch_start, ch_end, ch_size;
-	int i, ch_type;
-
-	for (i = 0; i < MEMORY_CHUNKS; i++) {
-		if (chunk[i].size == 0)
-			continue;
-
-		/* Define chunk properties */
-		ch_start = chunk[i].addr;
-		ch_size = chunk[i].size;
-		ch_end = ch_start + ch_size - 1;
-		ch_type = chunk[i].type;
-
-		/* Is memory chunk hit by memory hole? */
-		if (addr + size <= ch_start)
-			continue; /* No: memory hole in front of chunk */
-		if (addr > ch_end)
-			continue; /* No: memory hole after chunk */
-
-		/* Yes: Define local hole properties */
-		lh_start = max(addr, chunk[i].addr);
-		lh_end = min(addr + size - 1, ch_end);
-		lh_size = lh_end - lh_start + 1;
-
-		if (lh_start == ch_start && lh_end == ch_end) {
-			/* Hole covers complete memory chunk */
-			mem_chunk_init(&chunk[i], lh_start, lh_size, type);
-		} else if (lh_end == ch_end) {
-			/* Hole starts in memory chunk and convers chunk end */
-			mem_chunk_move(chunk, i + 1, i);
-			mem_chunk_init(&chunk[i], ch_start, ch_size - lh_size,
-				       ch_type);
-			mem_chunk_init(&chunk[i + 1], lh_start, lh_size, type);
-			i += 1;
-		} else if (lh_start == ch_start) {
-			/* Hole ends in memory chunk */
-			mem_chunk_move(chunk, i + 1, i);
-			mem_chunk_init(&chunk[i], lh_start, lh_size, type);
-			mem_chunk_init(&chunk[i + 1], lh_end + 1,
-				       ch_size - lh_size, ch_type);
-			break;
-		} else {
-			/* Hole splits memory chunk */
-			mem_chunk_move(chunk, i + 2, i);
-			mem_chunk_init(&chunk[i], ch_start,
-				       lh_start - ch_start, ch_type);
-			mem_chunk_init(&chunk[i + 1], lh_start, lh_size, type);
-			mem_chunk_init(&chunk[i + 2], lh_end + 1,
-				       ch_end - lh_end, ch_type);
-			break;
-		}
-	}
-}
diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c
index 0f419c5765c8..0a49095104c9 100644
--- a/arch/s390/kernel/setup.c
+++ b/arch/s390/kernel/setup.c
@@ -226,25 +226,17 @@ static void __init conmode_default(void)
 }
 
 #ifdef CONFIG_ZFCPDUMP
-static void __init setup_zfcpdump(unsigned int console_devno)
+static void __init setup_zfcpdump(void)
 {
-	static char str[41];
-
 	if (ipl_info.type != IPL_TYPE_FCP_DUMP)
 		return;
 	if (OLDMEM_BASE)
 		return;
-	if (console_devno != -1)
-		sprintf(str, " cio_ignore=all,!0.0.%04x,!0.0.%04x",
-			ipl_info.data.fcp.dev_id.devno, console_devno);
-	else
-		sprintf(str, " cio_ignore=all,!0.0.%04x",
-			ipl_info.data.fcp.dev_id.devno);
-	strcat(boot_command_line, str);
+	strcat(boot_command_line, " cio_ignore=all,!ipldev,!condev");
 	console_loglevel = 2;
 }
 #else
-static inline void setup_zfcpdump(unsigned int console_devno) {}
+static inline void setup_zfcpdump(void) {}
 #endif /* CONFIG_ZFCPDUMP */
 
  /*
@@ -471,14 +463,10 @@ static void __init setup_resources(void)
 	for (i = 0; i < MEMORY_CHUNKS; i++) {
 		if (!memory_chunk[i].size)
 			continue;
-		if (memory_chunk[i].type == CHUNK_OLDMEM ||
-		    memory_chunk[i].type == CHUNK_CRASHK)
-			continue;
 		res = alloc_bootmem_low(sizeof(*res));
 		res->flags = IORESOURCE_BUSY | IORESOURCE_MEM;
 		switch (memory_chunk[i].type) {
 		case CHUNK_READ_WRITE:
-		case CHUNK_CRASHK:
 			res->name = "System RAM";
 			break;
 		case CHUNK_READ_ONLY:
@@ -510,12 +498,10 @@ static void __init setup_resources(void)
 	}
 }
 
-unsigned long real_memory_size;
-EXPORT_SYMBOL_GPL(real_memory_size);
-
 static void __init setup_memory_end(void)
 {
 	unsigned long vmax, vmalloc_size, tmp;
+	unsigned long real_memory_size = 0;
 	int i;
 
 
@@ -525,7 +511,6 @@ static void __init setup_memory_end(void)
 		memory_end_set = 1;
 	}
 #endif
-	real_memory_size = 0;
 	memory_end &= PAGE_MASK;
 
 	/*
@@ -538,6 +523,8 @@ static void __init setup_memory_end(void)
 		unsigned long align;
 
 		chunk = &memory_chunk[i];
+		if (!chunk->size)
+			continue;
 		align = 1UL << (MAX_ORDER + PAGE_SHIFT - 1);
 		start = (chunk->addr + align - 1) & ~(align - 1);
 		end = (chunk->addr + chunk->size) & ~(align - 1);
@@ -588,6 +575,8 @@ static void __init setup_memory_end(void)
 	for (i = 0; i < MEMORY_CHUNKS; i++) {
 		struct mem_chunk *chunk = &memory_chunk[i];
 
+		if (!chunk->size)
+			continue;
 		if (chunk->addr >= memory_end) {
 			memset(chunk, 0, sizeof(*chunk));
 			continue;
@@ -688,15 +677,6 @@ static int __init verify_crash_base(unsigned long crash_base,
 }
 
 /*
- * Reserve kdump memory by creating a memory hole in the mem_chunk array
- */
-static void __init reserve_kdump_bootmem(unsigned long addr, unsigned long size,
-					 int type)
-{
-	create_mem_hole(memory_chunk, addr, size, type);
-}
-
-/*
  * When kdump is enabled, we have to ensure that no memory from
  * the area [0 - crashkernel memory size] and
  * [crashk_res.start - crashk_res.end] is set offline.
@@ -727,16 +707,22 @@ static struct notifier_block kdump_mem_nb = {
 static void reserve_oldmem(void)
 {
 #ifdef CONFIG_CRASH_DUMP
+	unsigned long real_size = 0;
+	int i;
+
 	if (!OLDMEM_BASE)
 		return;
+	for (i = 0; i < MEMORY_CHUNKS; i++) {
+		struct mem_chunk *chunk = &memory_chunk[i];
 
-	reserve_kdump_bootmem(OLDMEM_BASE, OLDMEM_SIZE, CHUNK_OLDMEM);
-	reserve_kdump_bootmem(OLDMEM_SIZE, memory_end - OLDMEM_SIZE,
-			      CHUNK_OLDMEM);
-	if (OLDMEM_BASE + OLDMEM_SIZE == real_memory_size)
+		real_size = max(real_size, chunk->addr + chunk->size);
+	}
+	create_mem_hole(memory_chunk, OLDMEM_BASE, OLDMEM_SIZE);
+	create_mem_hole(memory_chunk, OLDMEM_SIZE, real_size - OLDMEM_SIZE);
+	if (OLDMEM_BASE + OLDMEM_SIZE == real_size)
 		saved_max_pfn = PFN_DOWN(OLDMEM_BASE) - 1;
 	else
-		saved_max_pfn = PFN_DOWN(real_memory_size) - 1;
+		saved_max_pfn = PFN_DOWN(real_size) - 1;
 #endif
 }
 
@@ -775,7 +761,7 @@ static void __init reserve_crashkernel(void)
 	crashk_res.start = crash_base;
 	crashk_res.end = crash_base + crash_size - 1;
 	insert_resource(&iomem_resource, &crashk_res);
-	reserve_kdump_bootmem(crash_base, crash_size, CHUNK_CRASHK);
+	create_mem_hole(memory_chunk, crash_base, crash_size);
 	pr_info("Reserving %lluMB of memory at %lluMB "
 		"for crashkernel (System RAM: %luMB)\n",
 		crash_size >> 20, crash_base >> 20, memory_end >> 20);
@@ -847,11 +833,10 @@ static void __init setup_memory(void)
 	 * Register RAM areas with the bootmem allocator.
 	 */
 
-	for (i = 0; i < MEMORY_CHUNKS && memory_chunk[i].size > 0; i++) {
+	for (i = 0; i < MEMORY_CHUNKS; i++) {
 		unsigned long start_chunk, end_chunk, pfn;
 
-		if (memory_chunk[i].type != CHUNK_READ_WRITE &&
-		    memory_chunk[i].type != CHUNK_CRASHK)
+		if (!memory_chunk[i].size)
 			continue;
 		start_chunk = PFN_DOWN(memory_chunk[i].addr);
 		end_chunk = start_chunk + PFN_DOWN(memory_chunk[i].size);
@@ -1067,12 +1052,12 @@ void __init setup_arch(char **cmdline_p)
 		memcpy(&uaccess, &uaccess_std, sizeof(uaccess));
 
 	parse_early_param();
-
+	detect_memory_layout(memory_chunk, memory_end);
 	os_info_init();
 	setup_ipl();
+	reserve_oldmem();
 	setup_memory_end();
 	setup_addressing_mode();
-	reserve_oldmem();
 	reserve_crashkernel();
 	setup_memory();
 	setup_resources();
@@ -1097,5 +1082,5 @@ void __init setup_arch(char **cmdline_p)
 	set_preferred_console();
 
 	/* Setup zfcpdump support */
-	setup_zfcpdump(console_devno);
+	setup_zfcpdump();
 }
diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c
index 8074cb4b7cbf..05674b669001 100644
--- a/arch/s390/kernel/smp.c
+++ b/arch/s390/kernel/smp.c
@@ -645,7 +645,7 @@ static int __cpuinit __smp_rescan_cpus(struct sclp_cpu_info *info,
 			continue;
 		pcpu = pcpu_devices + cpu;
 		pcpu->address = info->cpu[i].address;
-		pcpu->state = (cpu >= info->configured) ?
+		pcpu->state = (i >= info->configured) ?
 			CPU_STATE_STANDBY : CPU_STATE_CONFIGURED;
 		smp_cpu_set_polarization(cpu, POLARIZATION_UNKNOWN);
 		set_cpu_present(cpu, true);
diff --git a/arch/s390/kernel/syscalls.S b/arch/s390/kernel/syscalls.S
index 9f214e992eed..913410bd74a3 100644
--- a/arch/s390/kernel/syscalls.S
+++ b/arch/s390/kernel/syscalls.S
@@ -157,7 +157,7 @@ SYSCALL(sys_readv,sys_readv,compat_sys_readv_wrapper)		/* 145 */
 SYSCALL(sys_writev,sys_writev,compat_sys_writev_wrapper)
 SYSCALL(sys_getsid,sys_getsid,sys32_getsid_wrapper)
 SYSCALL(sys_fdatasync,sys_fdatasync,sys32_fdatasync_wrapper)
-SYSCALL(sys_sysctl,sys_sysctl,sys32_sysctl_wrapper)
+SYSCALL(sys_sysctl,sys_sysctl,compat_sys_sysctl)
 SYSCALL(sys_mlock,sys_mlock,sys32_mlock_wrapper)		/* 150 */
 SYSCALL(sys_munlock,sys_munlock,sys32_munlock_wrapper)
 SYSCALL(sys_mlockall,sys_mlockall,sys32_mlockall_wrapper)
@@ -341,7 +341,7 @@ SYSCALL(sys_pwritev,sys_pwritev,compat_sys_pwritev)
 SYSCALL(sys_rt_tgsigqueueinfo,sys_rt_tgsigqueueinfo,compat_sys_rt_tgsigqueueinfo) /* 330 */
 SYSCALL(sys_perf_event_open,sys_perf_event_open,sys_perf_event_open_wrapper)
 SYSCALL(sys_fanotify_init,sys_fanotify_init,sys_fanotify_init_wrapper)
-SYSCALL(sys_fanotify_mark,sys_fanotify_mark,sys_fanotify_mark_wrapper)
+SYSCALL(sys_fanotify_mark,sys_fanotify_mark,compat_sys_fanotify_mark)
 SYSCALL(sys_prlimit64,sys_prlimit64,sys_prlimit64_wrapper)
 SYSCALL(sys_name_to_handle_at,sys_name_to_handle_at,sys_name_to_handle_at_wrapper) /* 335 */
 SYSCALL(sys_open_by_handle_at,sys_open_by_handle_at,compat_sys_open_by_handle_at)