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authorChristoph Lameter <cl@linux.com>2010-12-06 11:16:25 -0600
committerTejun Heo <tj@kernel.org>2010-12-17 15:07:19 +0100
commitb76834bc1b6db0a0923eed85c81b1113021b0612 (patch)
treeb68c24d71ad0e6f26b317a2ef03c6139d31b8114 /kernel/kprobes.c
parent4a6f4fe8377720e5a279fdbb769946c242e936d3 (diff)
kprobes: Use this_cpu_ops
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>
Diffstat (limited to 'kernel/kprobes.c')
-rw-r--r--kernel/kprobes.c8
1 files changed, 4 insertions, 4 deletions
diff --git a/kernel/kprobes.c b/kernel/kprobes.c
index 9737a76e106..732f1e9b65e 100644
--- a/kernel/kprobes.c
+++ b/kernel/kprobes.c
@@ -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) {