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s390/mm: fix per vma lock fault handling
[ Upstream commit7686762d1e
] With per-vma locks, handle_mm_fault() may return non-fatal error flags. In this case the code should reset the fault flags before returning. Fixes:e06f47a165
("s390/mm: try VMA lock-based page fault handling first") Signed-off-by: Sven Schnelle <svens@linux.ibm.com> Reviewed-by: Heiko Carstens <hca@linux.ibm.com> Signed-off-by: Heiko Carstens <hca@linux.ibm.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
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@ -421,6 +421,8 @@ static inline vm_fault_t do_exception(struct pt_regs *regs, int access)
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vma_end_read(vma);
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if (!(fault & VM_FAULT_RETRY)) {
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count_vm_vma_lock_event(VMA_LOCK_SUCCESS);
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if (likely(!(fault & VM_FAULT_ERROR)))
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fault = 0;
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goto out;
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}
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count_vm_vma_lock_event(VMA_LOCK_RETRY);
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