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csky: mm: abort uaccess retries upon fatal signal

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Pick up the patch from the 'Link' made by Mark Rutland. Keep the
same with x86, arm, arm64, arc, sh, power.

Link: https://lore.kernel.org/linux-arm-kernel/1499782763-31418-1-git-send-email-mark.rutland@arm.com/
Signed-off-by: Guo Ren <guoren@linux.alibaba.com>
Cc: Mark Rutland <mark.rutland@arm.com>
This commit is contained in:
Guo Ren 2020-12-30 10:06:22 +00:00
parent bd0bf90e30
commit e26db7ad9c
1 changed files with 4 additions and 1 deletions
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5
arch/csky/mm/fault.c
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@ -279,8 +279,11 @@ good_area:
* signal first. We do not need to release the mmap_lock because it
* would already be released in __lock_page_or_retry in mm/filemap.c.
*/
if (fault_signal_pending(fault, regs))
if (fault_signal_pending(fault, regs)) {
if (!user_mode(regs))
no_context(regs, addr);
return;
}
if (unlikely((fault & VM_FAULT_RETRY) && (flags & FAULT_FLAG_ALLOW_RETRY))) {
flags |= FAULT_FLAG_TRIED;