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BACKPORT: arm64: entry: Remove confusing comment

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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 <will.deacon@arm.com>
Signed-off-by: UtsavBalar1231 <utsavbalar1231@gmail.com>
Change-Id: I0cd2fcac7dbefdc0b408d85be8bb39cd6590f3a9
This commit is contained in:
Will Deacon 2018-06-19 14:08:24 +01:00 committed by spakkkk
parent 1f680e3332
commit b1e8d392b9
1 changed files with 0 additions and 4 deletions
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arch/arm64/kernel/entry.S
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@ -359,10 +359,6 @@ alternative_else_nop_endif
ldp x24, x25, [sp, #16 * 12]
ldp x26, x27, [sp, #16 * 13]
ldp x28, x29, [sp, #16 * 14]
/*
* 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_if_not ARM64_UNMAP_KERNEL_AT_EL0