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Commit 3ea9f683 authored by Christoph Lameter's avatar Christoph Lameter Committed by Tejun Heo
Browse files

connector: Use this_cpu operations 



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: default avatarH. Peter Anvin <hpa@zytor.com>
Signed-off-by: default avatarChristoph Lameter <cl@linux.com>
Signed-off-by: default avatarTejun Heo <tj@kernel.org>
parent b2e4ae69

drivers/connector/cn_proc.c

+3 −2
Original line number Diff line number Diff line
@@ -43,9 +43,10 @@ static DEFINE_PER_CPU(__u32, proc_event_counts) = { 0 }; 


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();

	put_cpu_var(proc_event_counts);

	preempt_enable();

}



void proc_fork_connector(struct task_struct *task)