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| author | Pekka Enberg <penberg@cs.helsinki.fi> | 2005-09-09 13:10:16 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-09-09 14:03:43 -0700 |
| commit | 80e93effce55044c5a7fa96e8b313640a80bd4e9 (patch) | |
| tree | 339f0ac4c6d022ba048e109e51580c26ce4d252e /mm | |
| parent | af97c7220a0376beed827e72e3bb27731af7109d (diff) | |
| download | lwn-80e93effce55044c5a7fa96e8b313640a80bd4e9.tar.gz lwn-80e93effce55044c5a7fa96e8b313640a80bd4e9.zip | |
[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.c | 2 | ||||
| -rw-r--r-- | mm/vmalloc.c | 7 |
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) { |