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authorRobert Richter <robert.richter@amd.com>2009-01-06 03:56:50 +0100
committerRobert Richter <robert.richter@amd.com>2009-01-07 22:45:46 +0100
commitbd7dc46f770d317ada1348294ff1f319243b803b (patch)
treeb328520c9676e4787de076aeb6e5c4804cd14786 /drivers/oprofile/buffer_sync.c
parentoprofile: add op_cpu_buffer_add_data() (diff)
downloadlinux-bd7dc46f770d317ada1348294ff1f319243b803b.tar.xz
linux-bd7dc46f770d317ada1348294ff1f319243b803b.zip
oprofile: add op_cpu_buffer_get_data()
This function provides access to attached data of a sample. It returns the size of data including the current value. Also, op_cpu_buffer_get_size() is available to check if there is data attached. Signed-off-by: Robert Richter <robert.richter@amd.com>
Diffstat (limited to 'drivers/oprofile/buffer_sync.c')
-rw-r--r--drivers/oprofile/buffer_sync.c6
1 files changed, 4 insertions, 2 deletions
diff --git a/drivers/oprofile/buffer_sync.c b/drivers/oprofile/buffer_sync.c
index d969bb13a252..f9031d31eeb7 100644
--- a/drivers/oprofile/buffer_sync.c
+++ b/drivers/oprofile/buffer_sync.c
@@ -524,6 +524,7 @@ void sync_buffer(int cpu)
{
struct mm_struct *mm = NULL;
struct mm_struct *oldmm;
+ unsigned long val;
struct task_struct *new;
unsigned long cookie = 0;
int in_kernel = 1;
@@ -559,10 +560,11 @@ void sync_buffer(int cpu)
state = sb_sample_start;
add_kernel_ctx_switch(flags & IS_KERNEL);
}
- if (flags & USER_CTX_SWITCH) {
+ if (flags & USER_CTX_SWITCH
+ && op_cpu_buffer_get_data(&entry, &val)) {
/* userspace context switch */
+ new = (struct task_struct *)val;
oldmm = mm;
- new = (struct task_struct *)sample->data[0];
release_mm(oldmm);
mm = take_tasks_mm(new);
if (mm != oldmm)