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powerpc/mm: Move mmap_sem unlock up from do_sigbus

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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>
This commit is contained in:
Laurent Dufour 2017-02-14 17:45:10 +01:00 committed by Michael Ellerman
parent 20f13b95ee
commit c2294e0ffe
1 changed files with 3 additions and 3 deletions
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6
arch/powerpc/mm/fault.c
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@ -120,8 +120,6 @@ static int do_sigbus(struct pt_regs *regs, unsigned long address,
siginfo_t info;
unsigned int lsb = 0;
up_read(&current->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(&current->mm->mmap_sem);
return do_sigbus(regs, addr, fault);
}
/* We don't understand the fault code, this is fatal */
BUG();