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| author |   gaoxu <gaoxu2@honor.com> | 2025-04-17 07:30:00 +0000 |
|---|---|---|
| committer |   Tejun Heo <tj@kernel.org> | 2025-04-17 06:27:31 -1000 |
| commit | 87c259a7a359e73e6c52c68fcbec79988999b4e6 (patch) | |
| tree | 4b6c3bf1cb10d685fae68dc1578908ff395ee5a0 | |
| parent | Merge tag 'mm-hotfixes-stable-2025-04-16-19-59' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm (diff) | |
| download | wireguard-linux-87c259a7a359e73e6c52c68fcbec79988999b4e6.tar.xz wireguard-linux-87c259a7a359e73e6c52c68fcbec79988999b4e6.zip | |
cgroup: Fix compilation issue due to cgroup_mutex not being exported
When adding folio_memcg function call in the zram module for
Android16-6.12, the following error occurs during compilation:
ERROR: modpost: "cgroup_mutex" [../soc-repo/zram.ko] undefined!
This error is caused by the indirect call to lockdep_is_held(&cgroup_mutex)
within folio_memcg. The export setting for cgroup_mutex is controlled by
the CONFIG_PROVE_RCU macro. If CONFIG_LOCKDEP is enabled while
CONFIG_PROVE_RCU is not, this compilation error will occur.
To resolve this issue, add a parallel macro CONFIG_LOCKDEP control to
ensure cgroup_mutex is properly exported when needed.
Signed-off-by: gao xu <gaoxu2@honor.com>
Acked-by: Michal Koutný <mkoutny@suse.com>
Signed-off-by: Tejun Heo <tj@kernel.org>
| -rw-r--r-- | kernel/cgroup/cgroup.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/cgroup/cgroup.c b/kernel/cgroup/cgroup.c index 3caf2cd86e65..9c1bf7f7c812 100644 --- a/kernel/cgroup/cgroup.c +++ b/kernel/cgroup/cgroup.c @@ -90,7 +90,7 @@ DEFINE_MUTEX(cgroup_mutex); DEFINE_SPINLOCK(css_set_lock); -#ifdef CONFIG_PROVE_RCU +#if (defined CONFIG_PROVE_RCU || defined CONFIG_LOCKDEP) EXPORT_SYMBOL_GPL(cgroup_mutex); EXPORT_SYMBOL_GPL(css_set_lock); #endif |