[PATCH 24/27] staging: Use GFP_ATOMIC when a lock is held
Greg Kroah-Hartman
gregkh at suse.de
Fri Jun 4 20:45:41 UTC 2010
From: Julia Lawall <julia at diku.dk>
In each case, the containing function is only called from one place, where
a spin lock is held.
The semantic patch that makes this change is as follows:
(http://coccinelle.lip6.fr/)
// <smpl>
@gfp exists@
identifier fn;
position p;
@@
fn(...) {
... when != spin_unlock
when any
GFP_KERNEL at p
... when any
}
@locked@
identifier gfp.fn;
@@
spin_lock(...)
... when != spin_unlock
fn(...)
@depends on locked@
position gfp.p;
@@
- GFP_KERNEL at p
+ GFP_ATOMIC
// </smpl>
Signed-off-by: Julia Lawall <julia at diku.dk>
Cc: Jonathan Cameron <jic23 at cam.ac.uk>
Cc: Marek Lindner <lindner_marek at yahoo.de>
Cc: Martyn Welch <martyn.welch at ge.com>
Signed-off-by: Greg Kroah-Hartman <gregkh at suse.de>
---
drivers/staging/iio/ring_sw.c | 2 +-
drivers/staging/vme/bridges/vme_ca91cx42.c | 2 +-
drivers/staging/vme/bridges/vme_tsi148.c | 2 +-
3 files changed, 3 insertions(+), 3 deletions(-)
diff --git a/drivers/staging/iio/ring_sw.c b/drivers/staging/iio/ring_sw.c
index 1f14cd4..294272d 100644
--- a/drivers/staging/iio/ring_sw.c
+++ b/drivers/staging/iio/ring_sw.c
@@ -20,7 +20,7 @@ static inline int __iio_allocate_sw_ring_buffer(struct iio_sw_ring_buffer *ring,
if ((length == 0) || (bytes_per_datum == 0))
return -EINVAL;
__iio_update_ring_buffer(&ring->buf, bytes_per_datum, length);
- ring->data = kmalloc(length*ring->buf.bpd, GFP_KERNEL);
+ ring->data = kmalloc(length*ring->buf.bpd, GFP_ATOMIC);
ring->read_p = NULL;
ring->write_p = NULL;
ring->last_written_p = NULL;
diff --git a/drivers/staging/vme/bridges/vme_ca91cx42.c b/drivers/staging/vme/bridges/vme_ca91cx42.c
index 0c82eb4..0f9ea58 100644
--- a/drivers/staging/vme/bridges/vme_ca91cx42.c
+++ b/drivers/staging/vme/bridges/vme_ca91cx42.c
@@ -523,7 +523,7 @@ static int ca91cx42_alloc_resource(struct vme_master_resource *image,
}
if (image->bus_resource.name == NULL) {
- image->bus_resource.name = kmalloc(VMENAMSIZ+3, GFP_KERNEL);
+ image->bus_resource.name = kmalloc(VMENAMSIZ+3, GFP_ATOMIC);
if (image->bus_resource.name == NULL) {
dev_err(ca91cx42_bridge->parent, "Unable to allocate "
"memory for resource name\n");
diff --git a/drivers/staging/vme/bridges/vme_tsi148.c b/drivers/staging/vme/bridges/vme_tsi148.c
index abe88a3..f09cac1 100644
--- a/drivers/staging/vme/bridges/vme_tsi148.c
+++ b/drivers/staging/vme/bridges/vme_tsi148.c
@@ -828,7 +828,7 @@ static int tsi148_alloc_resource(struct vme_master_resource *image,
return 0;
if (image->bus_resource.name == NULL) {
- image->bus_resource.name = kmalloc(VMENAMSIZ+3, GFP_KERNEL);
+ image->bus_resource.name = kmalloc(VMENAMSIZ+3, GFP_ATOMIC);
if (image->bus_resource.name == NULL) {
dev_err(tsi148_bridge->parent, "Unable to allocate "
"memory for resource name\n");
--
1.7.1
More information about the devel
mailing list