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| author | Laurent Dufour <ldufour@linux.vnet.ibm.com> | 2017-02-14 17:45:10 +0100 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2017-03-21 22:08:53 +1100 |
| commit | c2294e0ffe741c8b34c630a71c7dc44d30503538 (patch) | |
| tree | 54a259cd001fca0c38082d52a666ce9f084ff74b /arch/powerpc/mm/fault.c | |
| parent | 20f13b95eef1b3ca75535e313357b0b096d39336 (diff) | |
| download | linux-c2294e0ffe741c8b34c630a71c7dc44d30503538.tar.bz2 | |
powerpc/mm: Move mmap_sem unlock up from do_sigbus
Move mmap_sem releasing in the do_sigbus()'s unique caller : mm_fault_error()
No functional changes.
Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Laurent Dufour <ldufour@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/mm/fault.c')
| -rw-r--r-- | arch/powerpc/mm/fault.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/arch/powerpc/mm/fault.c b/arch/powerpc/mm/fault.c index 51def8a515be..2d77c1c8014a 100644 --- a/arch/powerpc/mm/fault.c +++ b/arch/powerpc/mm/fault.c @@ -120,8 +120,6 @@ static int do_sigbus(struct pt_regs *regs, unsigned long address, siginfo_t info; unsigned int lsb = 0; - up_read(¤t->mm->mmap_sem); - if (!user_mode(regs)) return MM_FAULT_ERR(SIGBUS); @@ -185,8 +183,10 @@ static int mm_fault_error(struct pt_regs *regs, unsigned long addr, int fault) return MM_FAULT_RETURN; } - if (fault & (VM_FAULT_SIGBUS|VM_FAULT_HWPOISON|VM_FAULT_HWPOISON_LARGE)) + if (fault & (VM_FAULT_SIGBUS|VM_FAULT_HWPOISON|VM_FAULT_HWPOISON_LARGE)) { + up_read(¤t->mm->mmap_sem); return do_sigbus(regs, addr, fault); + } /* We don't understand the fault code, this is fatal */ BUG(); |