From 90794bf19dc19691a16b71bcd75c04094d9e392d Mon Sep 17 00:00:00 2001 From: Andrea Arcangeli Date: Wed, 22 Feb 2017 15:42:37 -0800 Subject: userfaultfd: non-cooperative: optimize mremap_userfaultfd_complete() Optimize the mremap_userfaultfd_complete() interface to pass only the vm_userfaultfd_ctx pointer through the stack as a microoptimization. Link: http://lkml.kernel.org/r/20161216144821.5183-13-aarcange@redhat.com Signed-off-by: Andrea Arcangeli Reported-by: Hillf Danton Acked-by: Mike Rapoport Cc: "Dr. David Alan Gilbert" Cc: Michael Rapoport Cc: Mike Kravetz Cc: Pavel Emelyanov Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/userfaultfd.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'fs/userfaultfd.c') diff --git a/fs/userfaultfd.c b/fs/userfaultfd.c index 68f978beefac..5d37c37854b0 100644 --- a/fs/userfaultfd.c +++ b/fs/userfaultfd.c @@ -608,11 +608,11 @@ void mremap_userfaultfd_prep(struct vm_area_struct *vma, } } -void mremap_userfaultfd_complete(struct vm_userfaultfd_ctx vm_ctx, +void mremap_userfaultfd_complete(struct vm_userfaultfd_ctx *vm_ctx, unsigned long from, unsigned long to, unsigned long len) { - struct userfaultfd_ctx *ctx = vm_ctx.ctx; + struct userfaultfd_ctx *ctx = vm_ctx->ctx; struct userfaultfd_wait_queue ewq; if (!ctx) -- cgit