Revision 788c1da05b73aee68ed98f05b577c308351f5619 authored by Linus Torvalds on 02 December 2017, 01:00:19 UTC, committed by Linus Torvalds on 02 December 2017, 01:00:19 UTC
Pull xfs fixes from Darrick Wong: "Here are some bug fixes for 4.15-rc2. - fix memory leaks that appeared after removing ifork inline data buffer - recover deferred rmap update log items in correct order - fix memory leaks when buffer construction fails - fix memory leaks when bmbt is corrupt - fix some uninitialized variables and math problems in the quota scrubber - add some omitted attribution tags on the log replay commit - fix some UBSAN complaints about integer overflows with large sparse files - implement an effective inode mode check in online fsck - fix log's inability to retry quota item writeout due to transient errors" * tag 'xfs-4.15-fixes-4' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux: xfs: Properly retry failed dquot items in case of error during buffer writeback xfs: scrub inode mode properly xfs: remove unused parameter from xfs_writepage_map xfs: ubsan fixes xfs: calculate correct offset in xfs_scrub_quota_item xfs: fix uninitialized variable in xfs_scrub_quota xfs: fix leaks on corruption errors in xfs_bmap.c xfs: fortify xfs_alloc_buftarg error handling xfs: log recovery should replay deferred ops in order xfs: always free inline data before resetting inode fork during ifree
once.c
// SPDX-License-Identifier: GPL-2.0
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/once.h>
#include <linux/random.h>
struct once_work {
struct work_struct work;
struct static_key_true *key;
};
static void once_deferred(struct work_struct *w)
{
struct once_work *work;
work = container_of(w, struct once_work, work);
BUG_ON(!static_key_enabled(work->key));
static_branch_disable(work->key);
kfree(work);
}
static void once_disable_jump(struct static_key_true *key)
{
struct once_work *w;
w = kmalloc(sizeof(*w), GFP_ATOMIC);
if (!w)
return;
INIT_WORK(&w->work, once_deferred);
w->key = key;
schedule_work(&w->work);
}
static DEFINE_SPINLOCK(once_lock);
bool __do_once_start(bool *done, unsigned long *flags)
__acquires(once_lock)
{
spin_lock_irqsave(&once_lock, *flags);
if (*done) {
spin_unlock_irqrestore(&once_lock, *flags);
/* Keep sparse happy by restoring an even lock count on
* this lock. In case we return here, we don't call into
* __do_once_done but return early in the DO_ONCE() macro.
*/
__acquire(once_lock);
return false;
}
return true;
}
EXPORT_SYMBOL(__do_once_start);
void __do_once_done(bool *done, struct static_key_true *once_key,
unsigned long *flags)
__releases(once_lock)
{
*done = true;
spin_unlock_irqrestore(&once_lock, *flags);
once_disable_jump(once_key);
}
EXPORT_SYMBOL(__do_once_done);
Computing file changes ...