Commit-ID: 4c5e3c63752162262c42424147f319b8571a20af Gitweb: http://git.kernel.org/tip/4c5e3c63752162262c42424147f319b8571a20af Author: Thomas Gleixner <[email protected]> AuthorDate: Sat, 19 Nov 2016 13:47:40 +0000 Committer: Thomas Gleixner <[email protected]> CommitDate: Tue, 29 Nov 2016 19:23:18 +0100
x86/tsc: Move sync cleanup to a safe place Cleaning up the stop marker on the control CPU is wrong when we want to add retry support. Move the cleanup to the starting CPU. Signed-off-by: Thomas Gleixner <[email protected]> Reviewed-by: Ingo Molnar <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Yinghai Lu <[email protected]> Cc: Borislav Petkov <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Thomas Gleixner <[email protected]> --- arch/x86/kernel/tsc_sync.c | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) diff --git a/arch/x86/kernel/tsc_sync.c b/arch/x86/kernel/tsc_sync.c index fdb3b7b..8f394eeb 100644 --- a/arch/x86/kernel/tsc_sync.c +++ b/arch/x86/kernel/tsc_sync.c @@ -267,11 +267,6 @@ void check_tsc_sync_source(int cpu) } /* - * Reset it - in case this is a second bootup: - */ - atomic_set(&stop_count, 0); - - /* * Wait for the target to start or to skip the test: */ while (atomic_read(&start_count) != cpus - 1) { @@ -360,6 +355,11 @@ void check_tsc_sync_target(void) */ while (atomic_read(&stop_count) != cpus) cpu_relax(); + + /* + * Reset it for the next sync test: + */ + atomic_set(&stop_count, 0); } #endif /* CONFIG_SMP */
