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authorPekka Enberg <penberg@cs.helsinki.fi>2005-09-10 00:10:16 +0400
committerLinus Torvalds <torvalds@g5.osdl.org>2005-09-10 01:03:43 +0400
commit80e93effce55044c5a7fa96e8b313640a80bd4e9 (patch)
tree339f0ac4c6d022ba048e109e51580c26ce4d252e /mm
parentaf97c7220a0376beed827e72e3bb27731af7109d (diff)
downloadlinux-80e93effce55044c5a7fa96e8b313640a80bd4e9.tar.xz
[PATCH] update kfree, vfree, and vunmap kerneldoc
This patch clarifies NULL handling of kfree() and vfree(). I addition, wording of calling context restriction for vfree() and vunmap() are changed from "may not" to "must not." Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi> Acked-by: Manfred Spraul <manfred@colorfullife.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'mm')
-rw-r--r--mm/slab.c2
-rw-r--r--mm/vmalloc.c7
2 files changed, 6 insertions, 3 deletions
diff --git a/mm/slab.c b/mm/slab.c
index a041c5378dfa..05a391059fe1 100644
--- a/mm/slab.c
+++ b/mm/slab.c
@@ -2998,6 +2998,8 @@ EXPORT_SYMBOL(kzalloc);
* kfree - free previously allocated memory
* @objp: pointer returned by kmalloc.
*
+ * If @objp is NULL, no operation is performed.
+ *
* Don't free memory not originally allocated by kmalloc()
* or you will run into trouble.
*/
diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 67b358e57ef6..13c3d82968ae 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -332,9 +332,10 @@ void __vunmap(void *addr, int deallocate_pages)
* @addr: memory base address
*
* Free the virtually contiguous memory area starting at @addr, as
- * obtained from vmalloc(), vmalloc_32() or __vmalloc().
+ * obtained from vmalloc(), vmalloc_32() or __vmalloc(). If @addr is
+ * NULL, no operation is performed.
*
- * May not be called in interrupt context.
+ * Must not be called in interrupt context.
*/
void vfree(void *addr)
{
@@ -352,7 +353,7 @@ EXPORT_SYMBOL(vfree);
* Free the virtually contiguous memory area starting at @addr,
* which was created from the page array passed to vmap().
*
- * May not be called in interrupt context.
+ * Must not be called in interrupt context.
*/
void vunmap(void *addr)
{