Messages in this thread Patch in this message | | | From | Laurent Dufour <> | Subject | [PATCH 1/3] powerpc/mm: move mmap_sem unlock up from do_sigbus | Date | Tue, 14 Feb 2017 17:45:10 +0100 |
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Move mmap_sem releasing in the do_sigbus()'s unique caller : mm_fault_error()
No functional changes.
Signed-off-by: Laurent Dufour <ldufour@linux.vnet.ibm.com> --- arch/powerpc/mm/fault.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/arch/powerpc/mm/fault.c b/arch/powerpc/mm/fault.c index 62a50d6d1053..ee09604bbe12 100644 --- a/arch/powerpc/mm/fault.c +++ b/arch/powerpc/mm/fault.c @@ -119,8 +119,6 @@ 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); @@ -184,8 +182,10 @@ 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(); -- 2.7.4
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