lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

kprobes: Use this_cpu_ops

Browse Source 
Use this_cpu ops in various places to optimize per cpu data access.

Cc: Jason Baron <jbaron@redhat.com>
Cc: Namhyung Kim <namhyung@gmail.com>
Acked-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Christoph Lameter <cl@linux.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
This commit is contained in:
Christoph Lameter
2010-12-06 11:16:25 -06:00
committed by Tejun Heo
parent 4a6f4fe837
commit b76834bc1b
3 changed files with 13 additions and 13 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
kernel/kprobes.c
View File

@@ -317,12 +317,12 @@ void __kprobes free_optinsn_slot(kprobe_opcode_t * slot, int dirty)
/* We have preemption disabled.. so it is safe to use __ versions */
static inline void set_kprobe_instance(struct kprobe *kp)
{
__get_cpu_var(kprobe_instance) = kp;
__this_cpu_write(kprobe_instance, kp);
}
static inline void reset_kprobe_instance(void)
{
__get_cpu_var(kprobe_instance) = NULL;
__this_cpu_write(kprobe_instance, NULL);
}
/*
@@ -775,7 +775,7 @@ static void __kprobes aggr_post_handler(struct kprobe *p, struct pt_regs *regs,
static int __kprobes aggr_fault_handler(struct kprobe *p, struct pt_regs *regs,
int trapnr)
{
struct kprobe *cur = __get_cpu_var(kprobe_instance);
struct kprobe *cur = __this_cpu_read(kprobe_instance);
/*
* if we faulted "during" the execution of a user specified
@@ -790,7 +790,7 @@ static int __kprobes aggr_fault_handler(struct kprobe *p, struct pt_regs *regs,
static int __kprobes aggr_break_handler(struct kprobe *p, struct pt_regs *regs)
{
struct kprobe *cur = __get_cpu_var(kprobe_instance);
struct kprobe *cur = __this_cpu_read(kprobe_instance);
int ret = 0;
if (cur && cur->break_handler) {