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nick kvfree() from apparmor

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too many places open-code it

Conflicts:
	mm/util.c

Bug: 17871993
Change-Id: I007f4b663d7af564b2ce4009f5e13eeeeb82929a
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Git-commit: 39f1f78d53
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
[jgebben@codeaurora.org: Remove redundant apparmor code not present upstream]
Signed-off-by: Jeremy Gebben <jgebben@codeaurora.org>
Signed-off-by: Naveen Ramaraj <nramaraj@codeaurora.org>
This commit is contained in:
Al Viro 2014-09-23 10:17:29 -06:00 committed by Iliyan Malchev
parent 02660b51be
commit e0441174bb
4 changed files with 15 additions and 32 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

2
include/linux/mm.h
View file

@ -321,6 +321,8 @@ static inline int is_vmalloc_or_module_addr(const void *x)
}
#endif
extern void kvfree(const void *addr);
static inline void compound_lock(struct page *page)
{
#ifdef CONFIG_TRANSPARENT_HUGEPAGE

13
mm/util.c
View file

@ -4,6 +4,10 @@
#include <linux/export.h>
#include <linux/err.h>
#include <linux/sched.h>
#include <linux/security.h>
#include <linux/swap.h>
#include <linux/swapops.h>
#include <linux/vmalloc.h>
#include <asm/uaccess.h>
#include "internal.h"
@ -341,6 +345,15 @@ int __attribute__((weak)) get_user_pages_fast(unsigned long start,
}
EXPORT_SYMBOL_GPL(get_user_pages_fast);
void kvfree(const void *addr)
{
if (is_vmalloc_addr(addr))
vfree(addr);
else
kfree(addr);
}
EXPORT_SYMBOL(kvfree);
/* Tracepoints definitions. */
EXPORT_TRACEPOINT_SYMBOL(kmalloc);
EXPORT_TRACEPOINT_SYMBOL(kmem_cache_alloc);

1
security/apparmor/include/apparmor.h
View file

@ -65,7 +65,6 @@ extern int apparmor_initialized __initdata;
char *aa_split_fqname(char *args, char **ns_name);
void aa_info_message(const char *str);
void *kvmalloc(size_t size);
void kvfree(void *buffer);
/**

31
security/apparmor/lib.c
View file

@ -104,34 +104,3 @@ void *kvmalloc(size_t size)
return buffer;
}
/**
* do_vfree - workqueue routine for freeing vmalloced memory
* @work: data to be freed
*
* The work_struct is overlaid to the data being freed, as at the point
* the work is scheduled the data is no longer valid, be its freeing
* needs to be delayed until safe.
*/
static void do_vfree(struct work_struct *work)
{
vfree(work);
}
/**
* kvfree - free an allocation do by kvmalloc
* @buffer: buffer to free (MAYBE_NULL)
*
* Free a buffer allocated by kvmalloc
*/
void kvfree(void *buffer)
{
if (is_vmalloc_addr(buffer)) {
/* Data is no longer valid so just use the allocated space
* as the work_struct
*/
struct work_struct *work = (struct work_struct *) buffer;
INIT_WORK(work, do_vfree);
schedule_work(work);
} else
kfree(buffer);
}