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authorLinus Torvalds <torvalds@linux-foundation.org>2013-05-21 09:36:46 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2013-05-21 09:36:46 -0700
commitc4ad180f0e2ef98de48179aec7afe004562c0ec5 (patch)
tree150e920f530a4a12b56102e96fdf81ddf466cb68 /arch/s390/kernel
parentaa033810461ee56abbef6cef10aabd6b97f5caee (diff)
parent6b8224e40af147d3300136ce6d037db48f89068f (diff)
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Pull s390 update from Martin Schwidefsky: "An additional sysfs attribute for channel paths and a couple of bux fixes" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: s390/pgtable: fix ipte notify bit s390/xpram: mark xpram as non-rotational s390/smp: fix cpu re-scan vs. cpu state s390/cio: add channel ID sysfs attribute s390/ftrace: fix mcount adjustment s390: fix gmap_ipte_notifier vs. software dirty pages s390: disable pfmf for clear page instruction s390/disassembler: prevent endless loop in print_fn_code() s390: remove non existent reference to GENERIC_KERNEL_THREAD
Diffstat (limited to 'arch/s390/kernel')
-rw-r--r--arch/s390/kernel/dis.c2
-rw-r--r--arch/s390/kernel/ftrace.c9
-rw-r--r--arch/s390/kernel/mcount.S2
-rw-r--r--arch/s390/kernel/mcount64.S2
-rw-r--r--arch/s390/kernel/smp.c2
5 files changed, 9 insertions, 8 deletions
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/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/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);