From: Will Deacon Date: Tue, 19 Jun 2018 13:08:24 +0000 (+0100) Subject: arm64: entry: Remove confusing comment X-Git-Url: http://git.lede-project.org./?a=commitdiff_plain;h=8cb3451b1f240ec4d36a9bfcd39cb6d59769a5b3;p=openwrt%2Fstaging%2Fblogic.git arm64: entry: Remove confusing comment The comment about SYS_MEMBARRIER_SYNC_CORE relying on ERET being context-synchronizing is confusing and misplaced with kpti. Given that this is already documented under Documentation/ (see arch-support.txt for membarrier), remove the comment altogether. Signed-off-by: Will Deacon --- diff --git a/arch/arm64/kernel/entry.S b/arch/arm64/kernel/entry.S index a7fc77ab4a0a..c7d050207e53 100644 --- a/arch/arm64/kernel/entry.S +++ b/arch/arm64/kernel/entry.S @@ -344,10 +344,6 @@ alternative_else_nop_endif ldp x28, x29, [sp, #16 * 14] ldr lr, [sp, #S_LR] add sp, sp, #S_FRAME_SIZE // restore sp - /* - * ARCH_HAS_MEMBARRIER_SYNC_CORE rely on eret context synchronization - * when returning from IPI handler, and when returning to user-space. - */ .if \el == 0 alternative_insn eret, nop, ARM64_UNMAP_KERNEL_AT_EL0