[PATCH v2 3/6] powerpc: fadump: use lock guard for mutex

From: Shrikanth Hegde
Date: Fri Mar 14 2025 - 07:46:15 EST


use scoped_guard for scope based resource management of mutex.
This would make the code simpler and easier to maintain.

More details on lock guards can be found at
https://lore.kernel.org/all/20230612093537.614161713@xxxxxxxxxxxxx/T/#u

Signed-off-by: Shrikanth Hegde <sshegde@xxxxxxxxxxxxx>
---
arch/powerpc/kernel/fadump.c | 11 ++++-------
1 file changed, 4 insertions(+), 7 deletions(-)

diff --git a/arch/powerpc/kernel/fadump.c b/arch/powerpc/kernel/fadump.c
index 4b371c738213..fc6c5275811e 100644
--- a/arch/powerpc/kernel/fadump.c
+++ b/arch/powerpc/kernel/fadump.c
@@ -1374,15 +1374,12 @@ static void fadump_free_elfcorehdr_buf(void)

static void fadump_invalidate_release_mem(void)
{
- mutex_lock(&fadump_mutex);
- if (!fw_dump.dump_active) {
- mutex_unlock(&fadump_mutex);
- return;
+ scoped_guard(mutex, &fadump_mutex) {
+ if (!fw_dump.dump_active)
+ return;
+ fadump_cleanup();
}

- fadump_cleanup();
- mutex_unlock(&fadump_mutex);
-
fadump_free_elfcorehdr_buf();
fadump_release_memory(fw_dump.boot_mem_top, memblock_end_of_DRAM());
fadump_free_cpu_notes_buf();
--
2.39.3