From: John Stultz <jstultz@xxxxxxxxxx>
[ 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>
---
fs/pstore/Kconfig | 1 +
1 file changed, 1 insertion(+)
diff --git a/fs/pstore/Kconfig b/fs/pstore/Kconfig
index b42e5bd6d8ff..144e5027fe84 100644
--- a/fs/pstore/Kconfig
+++ b/fs/pstore/Kconfig
@@ -51,6 +51,7 @@ 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
--
2.35.1
