From: John Stultz jstultz@google.com
[ Upstream commit 2f4fec5943407318b9523f01ce1f5d668c028332 ]
In commit 76d62f24db07 ("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 Chienmidaschieh@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: 76d62f24db07 ("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 --- fs/pstore/Kconfig | 1 + 1 file changed, 1 insertion(+)
diff --git a/fs/pstore/Kconfig b/fs/pstore/Kconfig index 503086f7f7c1..d5fb6d95d4d4 100644 --- a/fs/pstore/Kconfig +++ b/fs/pstore/Kconfig @@ -117,6 +117,7 @@ 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