diff options
Diffstat (limited to 'arch/powerpc/kernel/entry_32.S')
-rw-r--r-- | arch/powerpc/kernel/entry_32.S | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/entry_32.S b/arch/powerpc/kernel/entry_32.S index 217ebdf5b00b..f4d0af8e1136 100644 --- a/arch/powerpc/kernel/entry_32.S +++ b/arch/powerpc/kernel/entry_32.S @@ -36,6 +36,12 @@ #include "head_32.h" /* + * powerpc relies on return from interrupt/syscall being context synchronising + * (which rfi is) to support ARCH_HAS_MEMBARRIER_SYNC_CORE without additional + * synchronisation instructions. + */ + +/* * Align to 4k in order to ensure that all functions modyfing srr0/srr1 * fit into one page in order to not encounter a TLB miss between the * modification of srr0/srr1 and the associated rfi. |