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Subject[PATCH v0 02/42] xen/x86: Check notifier registration return value
Date
From: Borislav Petkov <bp@suse.de>

Avoid homegrown notifier registration checks.

No functional changes.

Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: xen-devel@lists.xenproject.org
---
arch/x86/xen/enlighten.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/arch/x86/xen/enlighten.c b/arch/x86/xen/enlighten.c
index 95d970359e17..2264dd6e157f 100644
--- a/arch/x86/xen/enlighten.c
+++ b/arch/x86/xen/enlighten.c
@@ -354,7 +354,9 @@ static struct notifier_block xen_panic_block = {

int xen_panic_handler_init(void)
{
- atomic_notifier_chain_register(&panic_notifier_list, &xen_panic_block);
+ if (atomic_notifier_chain_register(&panic_notifier_list, &xen_panic_block))
+ pr_warn("Xen panic notifier already registered\n");
+
return 0;
}

--
2.29.2
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