diff options
Diffstat (limited to 'arch/arm/kernel')
| -rw-r--r-- | arch/arm/kernel/entry-armv.S | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/arch/arm/kernel/entry-armv.S b/arch/arm/kernel/entry-armv.S index f248bbfe745f..964cd717506b 100644 --- a/arch/arm/kernel/entry-armv.S +++ b/arch/arm/kernel/entry-armv.S | |||
| @@ -709,7 +709,12 @@ __kuser_memory_barrier: @ 0xffff0fa0 | |||
| 709 | * The C flag is also set if *ptr was changed to allow for assembly | 709 | * The C flag is also set if *ptr was changed to allow for assembly |
| 710 | * optimization in the calling code. | 710 | * optimization in the calling code. |
| 711 | * | 711 | * |
| 712 | * Note: this routine already includes memory barriers as needed. | 712 | * Notes: |
| 713 | * | ||
| 714 | * - This routine already includes memory barriers as needed. | ||
| 715 | * | ||
| 716 | * - A failure might be transient, i.e. it is possible, although unlikely, | ||
| 717 | * that "failure" be returned even if *ptr == oldval. | ||
| 713 | * | 718 | * |
| 714 | * For example, a user space atomic_add implementation could look like this: | 719 | * For example, a user space atomic_add implementation could look like this: |
| 715 | * | 720 | * |