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powerpc/xive: Add warning if target CPU not found

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Add a warn_once to warn if the CPU target is not found. This could help
to find about any such usecase.

This is a very rare case, which either means mask was empty or
atomic update failed for all online CPUs. So it is worth printing that
path for potential fix.

Signed-off-by: Shrikanth Hegde <sshegde@linux.ibm.com>
Reviewed-by: Yury Norov <ynorov@gmail.com>
Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com>
Link: https://patch.msgid.link/20260427044715.559137-5-sshegde@linux.ibm.com
This commit is contained in:
Shrikanth Hegde 2026-04-27 10:17:15 +05:30 committed by Madhavan Srinivasan
parent 1f8986fdae
commit 0521dbbc57
1 changed files with 1 additions and 0 deletions
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arch/powerpc/sysdev/xive/common.c
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@ -564,6 +564,7 @@ static int xive_find_target_in_mask(const struct cpumask *mask,
return cpu;
}
WARN_ONCE(1, "target CPU not found in mask: %*pbl\n", cpumask_pr_args(mask));
return -1;
}