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authorNikolay Borisov <nik.borisov@suse.com>2025-02-25 16:33:48 +0200
committerBorislav Petkov (AMD) <bp@alien8.de>2025-02-26 12:18:37 +0100
commit6447828875b7d768e4ef0f58765b4bd4e16bcf18 (patch)
tree42d542fd45bb4a7d5567c3e203b8b5ce3a4d409d /tools/testing/selftests/bpf/prog_tests/percpu_alloc.c
parentd082ecbc71e9e0bf49883ee4afd435a77a5101b6 (diff)
downloadlwn-6447828875b7d768e4ef0f58765b4bd4e16bcf18.tar.gz
lwn-6447828875b7d768e4ef0f58765b4bd4e16bcf18.zip
x86/mce/inject: Remove call to mce_notify_irq()
The call to mce_notify_irq() has been there since the initial version of the soft inject mce machinery, introduced in ea149b36c7f5 ("x86, mce: add basic error injection infrastructure"). At that time it was functional since injecting an MCE resulted in the following call chain: raise_mce() ->machine_check_poll() ->mce_log() - sets notfiy_user_bit ->mce_notify_user() (current mce_notify_irq) consumed the bit and called the usermode helper. However, with the introduction of 011d82611172 ("RAS: Add a Corrected Errors Collector") the code got moved around and the usermode helper began to be called via the early notifier mce_first_notifier() rendering the call in raise_local() defunct as the mce_need_notify bit (ex notify_user) is only being set from the early notifier. Remove the noop call and make mce_notify_irq() static. No functional changes. Signed-off-by: Nikolay Borisov <nik.borisov@suse.com> Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de> Link: https://lore.kernel.org/r/20250225143348.268469-1-nik.borisov@suse.com
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