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| author | Thomas Gleixner <tglx@linutronix.de> | 2009-07-25 16:18:34 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2011-09-13 11:12:05 +0200 |
| commit | 2d21a29fb62f142b8a62496700d8d82a6a8fd783 (patch) | |
| tree | 78d83ed47a72b1e31ecadb3f77e91f865b407b48 | |
| parent | 6b2c1800f1d3a608af952cfbd57f8f1a71c5d9b4 (diff) | |
| download | linux-2d21a29fb62f142b8a62496700d8d82a6a8fd783.tar.gz linux-2d21a29fb62f142b8a62496700d8d82a6a8fd783.tar.bz2 linux-2d21a29fb62f142b8a62496700d8d82a6a8fd783.zip | |
locking, oprofile: Annotate oprofilefs lock as raw
The oprofilefs_lock can be taken in atomic context (in profiling
interrupts) and therefore cannot cannot be preempted on -rt -
annotate it.
In mainline this change documents the low level nature of
the lock - otherwise there's no functional difference. Lockdep
and Sparse checking will work as usual.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
| -rw-r--r-- | arch/x86/oprofile/nmi_int.c | 4 | ||||
| -rw-r--r-- | drivers/oprofile/event_buffer.c | 4 | ||||
| -rw-r--r-- | drivers/oprofile/oprofile_perf.c | 4 | ||||
| -rw-r--r-- | drivers/oprofile/oprofilefs.c | 6 | ||||
| -rw-r--r-- | include/linux/oprofile.h | 2 |
5 files changed, 10 insertions, 10 deletions
diff --git a/arch/x86/oprofile/nmi_int.c b/arch/x86/oprofile/nmi_int.c index 68894fdc034b..96646b3aeca8 100644 --- a/arch/x86/oprofile/nmi_int.c +++ b/arch/x86/oprofile/nmi_int.c @@ -355,10 +355,10 @@ static void nmi_cpu_setup(void *dummy) int cpu = smp_processor_id(); struct op_msrs *msrs = &per_cpu(cpu_msrs, cpu); nmi_cpu_save_registers(msrs); - spin_lock(&oprofilefs_lock); + raw_spin_lock(&oprofilefs_lock); model->setup_ctrs(model, msrs); nmi_cpu_setup_mux(cpu, msrs); - spin_unlock(&oprofilefs_lock); + raw_spin_unlock(&oprofilefs_lock); per_cpu(saved_lvtpc, cpu) = apic_read(APIC_LVTPC); apic_write(APIC_LVTPC, APIC_DM_NMI); } diff --git a/drivers/oprofile/event_buffer.c b/drivers/oprofile/event_buffer.c index dd87e86048be..c0cc4e7ff023 100644 --- a/drivers/oprofile/event_buffer.c +++ b/drivers/oprofile/event_buffer.c @@ -82,10 +82,10 @@ int alloc_event_buffer(void) { unsigned long flags; - spin_lock_irqsave(&oprofilefs_lock, flags); + raw_spin_lock_irqsave(&oprofilefs_lock, flags); buffer_size = oprofile_buffer_size; buffer_watershed = oprofile_buffer_watershed; - spin_unlock_irqrestore(&oprofilefs_lock, flags); + raw_spin_unlock_irqrestore(&oprofilefs_lock, flags); if (buffer_watershed >= buffer_size) return -EINVAL; diff --git a/drivers/oprofile/oprofile_perf.c b/drivers/oprofile/oprofile_perf.c index 94796f39bc47..da14432806c6 100644 --- a/drivers/oprofile/oprofile_perf.c +++ b/drivers/oprofile/oprofile_perf.c @@ -160,9 +160,9 @@ static int oprofile_perf_create_files(struct super_block *sb, struct dentry *roo static int oprofile_perf_setup(void) { - spin_lock(&oprofilefs_lock); + raw_spin_lock(&oprofilefs_lock); op_perf_setup(); - spin_unlock(&oprofilefs_lock); + raw_spin_unlock(&oprofilefs_lock); return 0; } diff --git a/drivers/oprofile/oprofilefs.c b/drivers/oprofile/oprofilefs.c index e9ff6f7770be..d0de6cc2d7a5 100644 --- a/drivers/oprofile/oprofilefs.c +++ b/drivers/oprofile/oprofilefs.c @@ -21,7 +21,7 @@ #define OPROFILEFS_MAGIC 0x6f70726f -DEFINE_SPINLOCK(oprofilefs_lock); +DEFINE_RAW_SPINLOCK(oprofilefs_lock); static struct inode *oprofilefs_get_inode(struct super_block *sb, int mode) { @@ -76,9 +76,9 @@ int oprofilefs_ulong_from_user(unsigned long *val, char const __user *buf, size_ if (copy_from_user(tmpbuf, buf, count)) return -EFAULT; - spin_lock_irqsave(&oprofilefs_lock, flags); + raw_spin_lock_irqsave(&oprofilefs_lock, flags); *val = simple_strtoul(tmpbuf, NULL, 0); - spin_unlock_irqrestore(&oprofilefs_lock, flags); + raw_spin_unlock_irqrestore(&oprofilefs_lock, flags); return 0; } diff --git a/include/linux/oprofile.h b/include/linux/oprofile.h index 49c8727eeb57..a4c562453f6b 100644 --- a/include/linux/oprofile.h +++ b/include/linux/oprofile.h @@ -166,7 +166,7 @@ ssize_t oprofilefs_ulong_to_user(unsigned long val, char __user * buf, size_t co int oprofilefs_ulong_from_user(unsigned long * val, char const __user * buf, size_t count); /** lock for read/write safety */ -extern spinlock_t oprofilefs_lock; +extern raw_spinlock_t oprofilefs_lock; /** * Add the contents of a circular buffer to the event buffer. |