Author: kib
Date: Sat Jan 24 12:51:15 2015
New Revision: 277643
URL: https://svnweb.freebsd.org/changeset/base/277643
Log:
Remove Giant from /dev/mem and /dev/kmem. It is definitely not needed
for i386, and from the code inspection, nothing in the
arm/mips/sparc64 implementations depends on it.
Discussed with: imp, nwhitehorn
Sponsored by: The FreeBSD Foundation
MFC after: 3 weeks
Modified:
head/sys/arm/arm/mem.c
head/sys/dev/mem/memdev.c
head/sys/i386/i386/mem.c
head/sys/mips/mips/mem.c
head/sys/sparc64/sparc64/mem.c
Modified: head/sys/arm/arm/mem.c
==============================================================================
--- head/sys/arm/arm/mem.c Sat Jan 24 12:43:36 2015 (r277642)
+++ head/sys/arm/arm/mem.c Sat Jan 24 12:51:15 2015 (r277643)
@@ -82,8 +82,6 @@ memrw(struct cdev *dev, struct uio *uio,
int error = 0;
vm_offset_t addr, eaddr;
- GIANT_REQUIRED;
-
while (uio->uio_resid > 0 && error == 0) {
iov = uio->uio_iov;
if (iov->iov_len == 0) {
Modified: head/sys/dev/mem/memdev.c
==============================================================================
--- head/sys/dev/mem/memdev.c Sat Jan 24 12:43:36 2015 (r277642)
+++ head/sys/dev/mem/memdev.c Sat Jan 24 12:51:15 2015 (r277643)
@@ -52,7 +52,7 @@ static struct cdev *memdev, *kmemdev;
static struct cdevsw mem_cdevsw = {
.d_version = D_VERSION,
- .d_flags = D_MEM|D_NEEDGIANT,
+ .d_flags = D_MEM,
.d_open = memopen,
.d_read = memrw,
.d_write = memrw,
Modified: head/sys/i386/i386/mem.c
==============================================================================
--- head/sys/i386/i386/mem.c Sat Jan 24 12:43:36 2015 (r277642)
+++ head/sys/i386/i386/mem.c Sat Jan 24 12:51:15 2015 (r277643)
@@ -86,10 +86,6 @@ memrw(struct cdev *dev, struct uio *uio,
int error = 0;
vm_offset_t addr;
- /* XXX UPS Why ? */
- GIANT_REQUIRED;
-
-
if (dev2unit(dev) != CDEV_MINOR_MEM && dev2unit(dev) != CDEV_MINOR_KMEM)
return EIO;
Modified: head/sys/mips/mips/mem.c
==============================================================================
--- head/sys/mips/mips/mem.c Sat Jan 24 12:43:36 2015 (r277642)
+++ head/sys/mips/mips/mem.c Sat Jan 24 12:51:15 2015 (r277643)
@@ -85,8 +85,6 @@ memrw(struct cdev *dev, struct uio *uio,
cnt = 0;
error = 0;
- GIANT_REQUIRED;
-
pmap_page_init(&m);
while (uio->uio_resid > 0 && !error) {
iov = uio->uio_iov;
Modified: head/sys/sparc64/sparc64/mem.c
==============================================================================
--- head/sys/sparc64/sparc64/mem.c Sat Jan 24 12:43:36 2015
(r277642)
+++ head/sys/sparc64/sparc64/mem.c Sat Jan 24 12:51:15 2015
(r277643)
@@ -99,8 +99,6 @@ memrw(struct cdev *dev, struct uio *uio,
error = 0;
ova = 0;
- GIANT_REQUIRED;
-
while (uio->uio_resid > 0 && error == 0) {
iov = uio->uio_iov;
if (iov->iov_len == 0) {
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