x86, mce: use atomic_inc_return() instead of add by 1

Use atomic_inc_return() instead of atomic_add_return() by 1.

Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
Cc: Andi Kleen <ak@linux.intel.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>

diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c
index 284d1de968bc3e1f2867eb2f3ca8cedf9338e1f6..7da8fec9ca881e9db31dedb38e3c4f03c665fefa 100644 (file)
--- a/arch/x86/kernel/cpu/mcheck/mce.c
+++ b/arch/x86/kernel/cpu/mcheck/mce.c
@@ -242,7 +242,7 @@ static void mce_panic(char *msg, struct mce *final, char *exp)
        /*
         * Make sure only one CPU runs in machine check panic
         */
-       if (atomic_add_return(1, &mce_paniced) > 1)
+       if (atomic_inc_return(&mce_paniced) > 1)
                wait_for_panic();
        barrier();
 
@@ -705,7 +705,7 @@ static int mce_start(int *no_way_out)
         * global_nwo should be updated before mce_callin
         */
        smp_wmb();
-       order = atomic_add_return(1, &mce_callin);
+       order = atomic_inc_return(&mce_callin);
 
        /*
         * Wait for everyone.