[src/trunk]: src/sys/external/bsd/drm2/linux Remove needless splvm/splx calls.

[riastradh <riastradh%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/230ecd30c447
branches:  trunk
changeset: 794925:230ecd30c447
user:      riastradh <riastradh%NetBSD.org@localhost>
date:      Fri Mar 28 23:19:41 2014 +0000

description:
Remove needless splvm/splx calls.

>From rmind@, who explained that the pmap(9) man page is wrong.

diffstat:

 sys/external/bsd/drm2/linux/linux_kmap.c |  12 ++----------
 1 files changed, 2 insertions(+), 10 deletions(-)

diffs (48 lines):

diff -r e684031dc32b -r 230ecd30c447 sys/external/bsd/drm2/linux/linux_kmap.c
--- a/sys/external/bsd/drm2/linux/linux_kmap.c  Fri Mar 28 21:57:22 2014 +0000
+++ b/sys/external/bsd/drm2/linux/linux_kmap.c  Fri Mar 28 23:19:41 2014 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: linux_kmap.c,v 1.2 2014/03/18 18:20:43 riastradh Exp $ */
+/*     $NetBSD: linux_kmap.c,v 1.3 2014/03/28 23:19:41 riastradh Exp $ */
 
 /*-
  * Copyright (c) 2013 The NetBSD Foundation, Inc.
@@ -30,7 +30,7 @@
  */
 
 #include <sys/cdefs.h>
-__KERNEL_RCSID(0, "$NetBSD: linux_kmap.c,v 1.2 2014/03/18 18:20:43 riastradh Exp $");
+__KERNEL_RCSID(0, "$NetBSD: linux_kmap.c,v 1.3 2014/03/28 23:19:41 riastradh Exp $");
 
 #include <sys/types.h>
 #include <sys/kmem.h>
@@ -194,16 +194,12 @@
        KASSERT(collision == lke);
        mutex_spin_exit(&linux_kmap_lock);
 
-       const int s = splvm();
-
        KASSERT(!pmap_extract(pmap_kernel(), vaddr, NULL));
        const int prot = (VM_PROT_READ | VM_PROT_WRITE);
        const int flags = 0;
        pmap_kenter_pa(vaddr, paddr, prot, flags);
        pmap_update(pmap_kernel());
 
-       splx(s);
-
        return (void *)vaddr;
 }
 
@@ -222,12 +218,8 @@
        const vaddr_t vaddr = lke->lke_vaddr;
        kmem_free(lke, sizeof(*lke));
 
-       const int s = splvm();
-
        KASSERT(pmap_extract(pmap_kernel(), vaddr, NULL));
 
        pmap_kremove(vaddr, PAGE_SIZE);
        pmap_update(pmap_kernel());
-
-       splx(s);
 }