From 240ddd495a9e72073d11b1b7c2ec9ea14e7015cb Mon Sep 17 00:00:00 2001 From: Jan Kara Date: Wed, 2 Oct 2013 16:27:47 +0200 Subject: vmw_vmci: Convert driver to use get_user_pages_fast() Convert vmci_host_setup_notify() and qp_host_get_user_memory() to use get_user_pages_fast() instead of get_user_pages(). Note that qp_host_get_user_memory() was using mmap_sem for writing without an apparent reason. CC: Arnd Bergmann Signed-off-by: Jan Kara Signed-off-by: Greg Kroah-Hartman --- drivers/misc/vmw_vmci/vmci_host.c | 6 +----- 1 file changed, 1 insertion(+), 5 deletions(-) (limited to 'drivers/misc/vmw_vmci/vmci_host.c') diff --git a/drivers/misc/vmw_vmci/vmci_host.c b/drivers/misc/vmw_vmci/vmci_host.c index d4722b3dc8ec..1723a6e4f2e8 100644 --- a/drivers/misc/vmw_vmci/vmci_host.c +++ b/drivers/misc/vmw_vmci/vmci_host.c @@ -243,11 +243,7 @@ static int vmci_host_setup_notify(struct vmci_ctx *context, /* * Lock physical page backing a given user VA. */ - down_read(¤t->mm->mmap_sem); - retval = get_user_pages(current, current->mm, - PAGE_ALIGN(uva), - 1, 1, 0, &page, NULL); - up_read(¤t->mm->mmap_sem); + retval = get_user_pages_fast(PAGE_ALIGN(uva), 1, 1, &page); if (retval != 1) return VMCI_ERROR_GENERIC; -- cgit v1.2.3