joel16/android_kernel_sony_msm8994_rework
1
0
Fork 0
mirror of https://github.com/joel16/android_kernel_sony_msm8994_rework.git synced 2025-01-01 09:08:55 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

connector: Use this_cpu operations

Browse Source 
The patch was originally in the use cpuops patchset but it needs an
inc_return and is therefore dependent on an extension of the cpu ops.
Fixed up and verified that it compiles.

get_seq can benefit from this_cpu_operations.  Address calculation is
avoided and the increment is done using an xadd.

Cc: Scott James Remnant <scott@ubuntu.com>
Cc: Mike Frysinger <vapier@gentoo.org>
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 2010-12-08 17:42:23 +01:00 committed by Tejun Heo
parent b2e4ae6975
commit 3ea9f6833c
1 changed files with 3 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
drivers/connector/cn_proc.c
View File

@ -43,9 +43,10 @@ static DEFINE_PER_CPU(__u32, proc_event_counts) = { 0 };
static inline void get_seq(__u32 *ts, int *cpu) static inline void get_seq(__u32 *ts, int *cpu)
{ {
*ts = get_cpu_var(proc_event_counts)++; preempt_disable();
*ts = __this_cpu_inc_return(proc_event_counts) -1;
*cpu = smp_processor_id(); *cpu = smp_processor_id();
put_cpu_var(proc_event_counts); preempt_enable();
} }
void proc_fork_connector(struct task_struct *task) void proc_fork_connector(struct task_struct *task)