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linux/kernel/printk
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Andrey Ryabinin 5c9cf8af2e 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>
2016-01-20 17:09:18 -08:00
..
braille.c printk: Fix return of braille_register_console() 2013-08-06 13:18:12 -07:00
braille.h printk: move braille console support into separate braille.[ch] files 2013-07-31 14:41:03 -07:00
console_cmdline.h console: Fix console name size mismatch 2015-03-07 03:39:55 +01:00
Makefile printk: move braille console support into separate braille.[ch] files 2013-07-31 14:41:03 -07:00
printk.c kernel: printk: specify alignment for struct printk_log 2016-01-20 17:09:18 -08:00