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MIPS: Prevent hitting do_notify_resume() with !user_mode(regs).

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Too late to do anything there...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Al Viro
2012-05-02 21:45:12 -04:00
committed by Ralf Baechle
parent e376fdf420
commit f76f330809
2 changed files with 3 additions and 8 deletions
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3
arch/mips/kernel/entry.S
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@@ -167,6 +167,9 @@ work_notifysig: # deal with pending signals and
FEXPORT(syscall_exit_work_partial)
SAVE_STATIC
syscall_exit_work:
LONG_L t0, PT_STATUS(sp) # returning to kernel mode?
andi t0, t0, KU_USER
beqz t0, resume_kernel
li t0, _TIF_WORK_SYSCALL_EXIT
and t0, a2 # a2 is preloaded with TI_FLAGS
beqz t0, work_pending # trace bit set?