diff options
| author | Sebastian Andrzej Siewior <bigeasy@linutronix.de> | 2016-09-08 13:48:06 +0200 |
|---|---|---|
| committer | Mister Oyster <oysterized@gmail.com> | 2017-04-11 10:58:52 +0200 |
| commit | d942cfabad003097e2ef070dee54e777a7951222 (patch) | |
| tree | a55ded4ed6e7188c8098e3079cb52d09d537020f /include/linux/timer.h | |
| parent | 7cd17d8ebda2884ac8fcf38787bc317cac21f1b7 (diff) | |
pstore/core: drop cmpxchg based updates
commit d5a9bf0b38d2ac85c9a693c7fb851f74fd2a2494 upstream.
I have here a FPGA behind PCIe which exports SRAM which I use for
pstore. Now it seems that the FPGA no longer supports cmpxchg based
updates and writes back 0xffâ¦ff and returns the same. This leads to
crash during crash rendering pstore useless.
Since I doubt that there is much benefit from using cmpxchg() here, I am
dropping this atomic access and use the spinlock based version.
Cc: Anton Vorontsov <anton@enomsg.org>
Cc: Colin Cross <ccross@android.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Rabin Vincent <rabinv@axis.com>
Tested-by: Rabin Vincent <rabinv@axis.com>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
[kees: remove "_locked" suffix since it's the only option now]
Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Willy Tarreau <w@1wt.eu>
Diffstat (limited to 'include/linux/timer.h')
0 files changed, 0 insertions, 0 deletions