[PATCH v0 34/42] powerpc: Check notifier registration return value
From: Borislav Petkov <bp@alien8.de>
Date: 2021-11-08 10:16:41
Also in:
lkml
Subsystem:
linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Linus Torvalds
From: Borislav Petkov <redacted> Avoid homegrown notifier registration checks. No functional changes. Signed-off-by: Borislav Petkov <redacted> Cc: linuxppc-dev@lists.ozlabs.org --- arch/powerpc/kernel/setup-common.c | 12 ++++++++---- 1 file changed, 8 insertions(+), 4 deletions(-)
diff --git a/arch/powerpc/kernel/setup-common.c b/arch/powerpc/kernel/setup-common.c
index b1e43b69a559..32f9900cd4f4 100644
--- a/arch/powerpc/kernel/setup-common.c
+++ b/arch/powerpc/kernel/setup-common.c@@ -725,14 +725,18 @@ static struct notifier_block kernel_offset_notifier = { void __init setup_panic(void) { - if (IS_ENABLED(CONFIG_RANDOMIZE_BASE) && kaslr_offset() > 0) - atomic_notifier_chain_register(&panic_notifier_list, - &kernel_offset_notifier); + if (IS_ENABLED(CONFIG_RANDOMIZE_BASE) && kaslr_offset() > 0) { + if (atomic_notifier_chain_register(&panic_notifier_list, + &kernel_offset_notifier)) + pr_warn("Kernel offset notifier already registered\n"); + } /* PPC64 always does a hard irq disable in its panic handler */ if (!IS_ENABLED(CONFIG_PPC64) && !ppc_md.panic) return; - atomic_notifier_chain_register(&panic_notifier_list, &ppc_panic_block); + + if (atomic_notifier_chain_register(&panic_notifier_list, &ppc_panic_block)) + pr_warn("Panic notifier already registered\n"); } #ifdef CONFIG_CHECK_CACHE_COHERENCY
--
2.29.2