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pstore: Make sure CONFIG_PSTORE_PMSG selects CONFIG_RT_MUTEXES 

[ Upstream commit 2f4fec5943 ]

In commit 76d62f24db ("pstore: Switch pmsg_lock to an rt_mutex
to avoid priority inversion") I changed a lock to an rt_mutex.

However, its possible that CONFIG_RT_MUTEXES is not enabled,
which then results in a build failure, as the 0day bot detected:
  https://lore.kernel.org/linux-mm/202212211244.TwzWZD3H-lkp@intel.com/

Thus this patch changes CONFIG_PSTORE_PMSG to select
CONFIG_RT_MUTEXES, which ensures the build will not fail.

Cc: Wei Wang <wvw@google.com>
Cc: Midas Chien<midaschieh@google.com>
Cc: Connor O'Brien <connoro@google.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Anton Vorontsov <anton@enomsg.org>
Cc: Colin Cross <ccross@android.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: kernel test robot <lkp@intel.com>
Cc: kernel-team@android.com
Fixes: 76d62f24db ("pstore: Switch pmsg_lock to an rt_mutex to avoid priority inversion")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: John Stultz <jstultz@google.com>
Signed-off-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20221221051855.15761-1-jstultz@google.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
John Stultz 2022-12-21 05:18:55 +00:00 committed by Greg Kroah-Hartman
parent 810f2cfdfe
commit 475add4617
1 changed files with 1 additions and 0 deletions
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fs/pstore/Kconfig
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@ -126,6 +126,7 @@ config PSTORE_CONSOLE
config PSTORE_PMSG
bool "Log user space messages"
depends on PSTORE
select RT_MUTEXES
help
When the option is enabled, pstore will export a character
interface /dev/pmsg0 to log user space messages. On reboot