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Commit fa45f116 authored Jan 03, 2019 by Davidlohr Bueso Committed by Linus Torvalds Jan 04, 2019

mm/: remove caller signal_pending branch predictions

This is already done for us internally by the signal machinery.

Link: http://lkml.kernel.org/r/20181116002713.8474-5-dave@stgolabs.net


Signed-off-by: Davidlohr Bueso <dave@stgolabs.net>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

parent d8d7d842

mm/filemap.c

+1 −1

Original line number	Original line	Diff line number	Diff line
	@@ -1125,7 +1125,7 @@ static inline int wait_on_page_bit_common(wait_queue_head_t *q,
	break;		break;
	}		}

	if (unlikely(signal_pending_state(state, current))) {		if (signal_pending_state(state, current)) {
	ret = -EINTR;		ret = -EINTR;
	break;		break;
	}		}

mm/gup.c

+1 −1

Original line number	Original line	Diff line number	Diff line
	@@ -727,7 +727,7 @@ static long __get_user_pages(struct task_struct tsk, struct mm_struct mm,
	* If we have a pending SIGKILL, don't keep faulting pages and		* If we have a pending SIGKILL, don't keep faulting pages and
	* potentially allocating memory.		* potentially allocating memory.
	*/		*/
	if (unlikely(fatal_signal_pending(current))) {		if (fatal_signal_pending(current)) {
	ret = -ERESTARTSYS;		ret = -ERESTARTSYS;
	goto out;		goto out;
	}		}

mm/hugetlb.c

+1 −1

Original line number	Original line	Diff line number	Diff line
	@@ -4231,7 +4231,7 @@ long follow_hugetlb_page(struct mm_struct mm, struct vm_area_struct vma,
	* If we have a pending SIGKILL, don't keep faulting pages and		* If we have a pending SIGKILL, don't keep faulting pages and
	* potentially allocating memory.		* potentially allocating memory.
	*/		*/
	if (unlikely(fatal_signal_pending(current))) {		if (fatal_signal_pending(current)) {
	remainder = 0;		remainder = 0;
	break;		break;
	}		}