The patch titled
Subject: put_bh() debug
has been removed from the -mm tree. Its filename was
put_bh-debug.patch
This patch was dropped because other changes were merged, which wrecked this patch
------------------------------------------------------
From: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Subject: put_bh() debug
Detect bh refcount underflows.
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/buffer.c | 8 ++++++++
include/linux/buffer_head.h | 6 +-----
2 files changed, 9 insertions(+), 5 deletions(-)
diff -puN fs/buffer.c~put_bh-debug fs/buffer.c
--- a/fs/buffer.c~put_bh-debug
+++ a/fs/buffer.c
@@ -47,6 +47,14 @@ static int fsync_buffers_list(spinlock_t
#define BH_ENTRY(list) list_entry((list), struct buffer_head, b_assoc_buffers)
+void put_bh(struct buffer_head *bh)
+{
+ WARN_ON(atomic_read(&bh->b_count) <= 0);
+ smp_mb__before_atomic_dec();
+ atomic_dec(&bh->b_count);
+}
+EXPORT_SYMBOL(put_bh);
+
void init_buffer(struct buffer_head *bh, bh_end_io_t *handler, void *private)
{
bh->b_end_io = handler;
diff -puN include/linux/buffer_head.h~put_bh-debug include/linux/buffer_head.h
--- a/include/linux/buffer_head.h~put_bh-debug
+++ a/include/linux/buffer_head.h
@@ -274,11 +274,7 @@ static inline void get_bh(struct buffer_
atomic_inc(&bh->b_count);
}
-static inline void put_bh(struct buffer_head *bh)
-{
- smp_mb__before_atomic();
- atomic_dec(&bh->b_count);
-}
+void put_bh(struct buffer_head *bh);
static inline void brelse(struct buffer_head *bh)
{
_
Patches currently in -mm which might be from akpm@xxxxxxxxxxxxxxxxxxxx are
origin.patch
i-need-old-gcc.patch
arch-alpha-kernel-systblss-remove-debug-check.patch
maintainers-akpm-maintenance.patch
mm-slab_commonc-suppress-warning.patch
mem-hotplug-fix-boot-failed-in-case-all-the-nodes-are-hotpluggable-checkpatch-fixes.patch
kernel-posix-timersc-code-clean-up-checkpatch-fixes.patch
input-route-kbd-leds-through-the-generic-leds-layer.patch
fs-ocfs2-stack_userc-fix-typo-in-ocfs2_control_release.patch
o2dlm-fix-null-pointer-dereference-in-o2dlm_blocking_ast_wrapper-checkpatch-fixes.patch
ocfs2-free-inode-when-i_count-becomes-zero.patch
mm.patch
memory-hotplug-add-sysfs-zones_online_to-attribute-fix.patch
memory-hotplug-add-sysfs-zones_online_to-attribute-fix-2.patch
mm-compaction-defer-each-zone-individually-instead-of-preferred-zone-fix.patch
mm-compaction-khugepaged-should-not-give-up-due-to-need_resched-fix.patch
prctl-pr_set_mm-introduce-pr_set_mm_map-operation-v3-fix.patch
mm-introduce-do_shared_fault-and-drop-do_fault-fix-fix.patch
do_shared_fault-check-that-mmap_sem-is-held.patch
checkpatch-fix-spello.patch
fs-proc-task_mmuc-shift-mm_access-from-m_start-to-proc_maps_open-checkpatch-fixes.patch
fs-proc-task_mmuc-simplify-the-vma_stop-logic-checkpatch-fixes.patch
fs-proc-task_nommuc-shift-mm_access-from-m_start-to-proc_maps_open-checkpatch-fixes.patch
linux-next.patch
drivers-gpio-gpio-zevioc-fix-build.patch
mm-replace-remap_file_pages-syscall-with-emulation.patch
watchdog-control-hard-lockup-detection-default-fix.patch
debugging-keep-track-of-page-owners.patch
debugging-keep-track-of-page-owners-fix.patch
journal_add_journal_head-debug.patch
journal_add_journal_head-debug-fix.patch
kernel-forkc-export-kernel_thread-to-modules.patch
mutex-subsystem-synchro-test-module.patch
slab-leaks3-default-y.patch
--
To unsubscribe from this list: send the line "unsubscribe mm-commits" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
