Commit a2a9e439 authored Aug 11, 2020 by Peter Xu Committed by Linus Torvalds Aug 12, 2020

mm/csky: use general page fault accounting



Use the general page fault accounting by passing regs into
handle_mm_fault().  It naturally solve the issue of multiple page fault
accounting when page fault retry happened.

Signed-off-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Guo Ren <guoren@kernel.org>
Link: http://lkml.kernel.org/r/20200707225021.200906-7-peterx@redhat.com


Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent 6a1bb025

arch/csky/mm/fault.c

+1 −11

Original line number	Diff line number	Diff line
		@@ -151,7 +151,7 @@ good_area:
		* the fault.
		*/
		fault = handle_mm_fault(vma, address, write ? FAULT_FLAG_WRITE : 0,
		NULL);
		regs);
		if (unlikely(fault & VM_FAULT_ERROR)) {
		if (fault & VM_FAULT_OOM)
		goto out_of_memory;
		@@ -161,16 +161,6 @@ good_area:
		goto bad_area;
		BUG();
		}
		if (fault & VM_FAULT_MAJOR) {
		tsk->maj_flt++;
		perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS_MAJ, 1, regs,
		address);
		} else {
		tsk->min_flt++;
		perf_sw_event(PERF_COUNT_SW_PAGE_FAULTS_MIN, 1, regs,
		address);
		}

		mmap_read_unlock(mm);
		return;

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