diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2010-10-13 16:50:23 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-10-13 16:50:23 -0700 |
| commit | fec896e21b65278a67b3a98073eef23351a74a4a (patch) | |
| tree | 3a0b1a4abfa362dd6b6690662cc6588bddb21262 | |
| parent | d94bc4fc24ed6263746934ace161ab916818d38a (diff) | |
| parent | d01343244abdedd18303d0323b518ed9cdcb1988 (diff) | |
Merge branch 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'perf-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
ring-buffer: Fix typo of time extends per page
perf, MIPS: Support cross compiling of tools/perf for MIPS
perf: Fix incorrect copy_from_user() usage
| -rw-r--r-- | kernel/perf_event.c | 4 | ||||
| -rw-r--r-- | kernel/trace/ring_buffer.c | 2 | ||||
| -rw-r--r-- | tools/perf/perf.h | 12 |
3 files changed, 14 insertions, 4 deletions
diff --git a/kernel/perf_event.c b/kernel/perf_event.c index db5b5606468..b98bed3d818 100644 --- a/kernel/perf_event.c +++ b/kernel/perf_event.c @@ -2202,15 +2202,13 @@ static void perf_event_for_each(struct perf_event *event, static int perf_event_period(struct perf_event *event, u64 __user *arg) { struct perf_event_context *ctx = event->ctx; - unsigned long size; int ret = 0; u64 value; if (!event->attr.sample_period) return -EINVAL; - size = copy_from_user(&value, arg, sizeof(value)); - if (size != sizeof(value)) + if (copy_from_user(&value, arg, sizeof(value))) return -EFAULT; if (!value) diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c index 492197e2f86..bca96377fd4 100644 --- a/kernel/trace/ring_buffer.c +++ b/kernel/trace/ring_buffer.c @@ -405,7 +405,7 @@ static inline int test_time_stamp(u64 delta) #define BUF_MAX_DATA_SIZE (BUF_PAGE_SIZE - (sizeof(u32) * 2)) /* Max number of timestamps that can fit on a page */ -#define RB_TIMESTAMPS_PER_PAGE (BUF_PAGE_SIZE / RB_LEN_TIME_STAMP) +#define RB_TIMESTAMPS_PER_PAGE (BUF_PAGE_SIZE / RB_LEN_TIME_EXTEND) int ring_buffer_print_page_header(struct trace_seq *s) { diff --git a/tools/perf/perf.h b/tools/perf/perf.h index ef7aa0a0c52..95aaf565c70 100644 --- a/tools/perf/perf.h +++ b/tools/perf/perf.h @@ -73,6 +73,18 @@ void get_term_dimensions(struct winsize *ws); #define cpu_relax() asm volatile("":::"memory") #endif +#ifdef __mips__ +#include "../../arch/mips/include/asm/unistd.h" +#define rmb() asm volatile( \ + ".set mips2\n\t" \ + "sync\n\t" \ + ".set mips0" \ + : /* no output */ \ + : /* no input */ \ + : "memory") +#define cpu_relax() asm volatile("" ::: "memory") +#endif + #include <time.h> #include <unistd.h> #include <sys/types.h> |