diff options
| author | Andrey Ryabinin <aryabinin@virtuozzo.com> | 2016-01-20 15:00:48 -0800 |
|---|---|---|
| committer | Seung-Woo Kim <sw0312.kim@samsung.com> | 2016-12-14 13:50:52 +0900 |
| commit | afd9366a637e65dfeff3d0ce1b20d85d1acca680 (patch) | |
| tree | 37ee11bf1b52a3c583b18b6d7e515d039197bf67 /include | |
| parent | d61ea97ba48d0346a3c3a4d24724e9301019c92c (diff) | |
kernel: printk: specify alignment for struct printk_log
On architectures that have support for efficient unaligned access struct
printk_log has 4-byte alignment. Specify alignment attribute in type
declaration.
The whole point of this patch is to fix deadlock which happening when
UBSAN detects unaligned access in printk() thus UBSAN recursively calls
printk() with logbuf_lock held by top printk() call.
Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Sasha Levin <sasha.levin@oracle.com>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Michal Marek <mmarek@suse.cz>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Yury Gribov <y.gribov@samsung.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Konstantin Khlebnikov <koct9i@gmail.com>
Cc: Kostya Serebryany <kcc@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
[Backport from mainline for UBSAN]
Signed-off-by: Seung-Woo Kim <sw0312.kim@samsung.com>
Change-Id: I93d23dec2c1539faf21eb7242ccc328999950c01
Diffstat (limited to 'include')
0 files changed, 0 insertions, 0 deletions