This is a note to let you know that I've just added the patch titled pstore: Make sure CONFIG_PSTORE_PMSG selects CONFIG_RT_MUTEXES to the 5.15-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: pstore-make-sure-config_pstore_pmsg-selects-config_r.patch and it can be found in the queue-5.15 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit ad88f2a0e832ce8cca22c471bb908f279ebfdcfd Author: John Stultz <jstultz@xxxxxxxxxx> Date: Wed Dec 21 05:18:55 2022 +0000 pstore: Make sure CONFIG_PSTORE_PMSG selects CONFIG_RT_MUTEXES [ 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@xxxxxxxxx/ Thus this patch changes CONFIG_PSTORE_PMSG to select CONFIG_RT_MUTEXES, which ensures the build will not fail. Cc: Wei Wang <wvw@xxxxxxxxxx> Cc: Midas Chien<midaschieh@xxxxxxxxxx> Cc: Connor O'Brien <connoro@xxxxxxxxxx> Cc: Kees Cook <keescook@xxxxxxxxxxxx> Cc: Anton Vorontsov <anton@xxxxxxxxxx> Cc: Colin Cross <ccross@xxxxxxxxxxx> Cc: Tony Luck <tony.luck@xxxxxxxxx> Cc: kernel test robot <lkp@xxxxxxxxx> Cc: kernel-team@xxxxxxxxxxx Fixes: 76d62f24db07 ("pstore: Switch pmsg_lock to an rt_mutex to avoid priority inversion") Reported-by: kernel test robot <lkp@xxxxxxxxx> Signed-off-by: John Stultz <jstultz@xxxxxxxxxx> Signed-off-by: Kees Cook <keescook@xxxxxxxxxxxx> Link: https://lore.kernel.org/r/20221221051855.15761-1-jstultz@xxxxxxxxxx Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/fs/pstore/Kconfig b/fs/pstore/Kconfig index 8adabde685f1..c49d554cc9ae 100644 --- a/fs/pstore/Kconfig +++ b/fs/pstore/Kconfig @@ -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