+ powerpc-xive-add-error-return-value-to-xive_smp_probe.patch added to mm-nonmm-unstable branch

The patch titled
     Subject: powerpc/xive: add error return value to xive_smp_probe()
has been added to the -mm mm-nonmm-unstable branch.  Its filename is
     powerpc-xive-add-error-return-value-to-xive_smp_probe.patch

This patch will shortly appear at
     https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/powerpc-xive-add-error-return-value-to-xive_smp_probe.patch

This patch will later appear in the mm-nonmm-unstable branch at
    git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

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------------------------------------------------------
From: Gou Hao <[email protected]>
Subject: powerpc/xive: add error return value to xive_smp_probe()
Date: Fri, 24 Jul 2026 10:28:47 +0800

xive_smp_probe() calls xive_init_ipis() which can fail, but its return
value is currently ignored.  Change xive_smp_probe() to return int so that
errors can be propagated to callers.

This is a preparatory patch for the next one.

No functional change yet; the return value is always 0 at this point.

Link: https://lore.kernel.org/[email protected]
Signed-off-by: Gou Hao <[email protected]>
Reviewed-by: Wentao Guan <[email protected]>
Reviewed-by: jiazhenyuan <[email protected]>
Reviewed-by: Cédric Le Goater <[email protected]>
Cc: Bharat Potnuri <[email protected]>
Cc: Dave Airlie <[email protected]>
Cc: Jason Gunthorpe <[email protected]>
Cc: Leon Romanovsky <[email protected]>
Cc: Maarten Lankhorst <[email protected]>
Cc: Madhavan Srinivasan <[email protected]>
Cc: Maxime Ripard <[email protected]>
Cc: Michael Ellerman <[email protected]>
Cc: Nam Cao <[email protected]>
Cc: Nicholas Piggin <[email protected]>
Cc: Nilay Shroff <[email protected]>
Cc: Shrikanth Hegde <[email protected]>
Cc: Thomas Zimemrmann <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
---

 arch/powerpc/include/asm/xive.h   |    4 ++--
 arch/powerpc/sysdev/xive/common.c |    4 +++-
 2 files changed, 5 insertions(+), 3 deletions(-)

--- a/arch/powerpc/include/asm/xive.h~powerpc-xive-add-error-return-value-to-xive_smp_probe
+++ a/arch/powerpc/include/asm/xive.h
@@ -91,7 +91,7 @@ static inline bool xive_enabled(void) {
 
 bool xive_spapr_init(void);
 bool xive_native_init(void);
-void xive_smp_probe(void);
+int xive_smp_probe(void);
 int  xive_smp_prepare_cpu(unsigned int cpu);
 void xive_smp_setup_cpu(void);
 void xive_smp_disable_cpu(void);
@@ -153,7 +153,7 @@ static inline bool xive_enabled(void) {
 
 static inline bool xive_spapr_init(void) { return false; }
 static inline bool xive_native_init(void) { return false; }
-static inline void xive_smp_probe(void) { }
+static inline int xive_smp_probe(void) { return -EINVAL; }
 static inline int  xive_smp_prepare_cpu(unsigned int cpu) { return -EINVAL; }
 static inline void xive_smp_setup_cpu(void) { }
 static inline void xive_smp_disable_cpu(void) { }
--- a/arch/powerpc/sysdev/xive/common.c~powerpc-xive-add-error-return-value-to-xive_smp_probe
+++ a/arch/powerpc/sysdev/xive/common.c
@@ -1254,7 +1254,7 @@ noinstr static void xive_cleanup_cpu_ipi
 	xive_ops->put_ipi(cpu, xc);
 }
 
-void __init xive_smp_probe(void)
+int __init xive_smp_probe(void)
 {
 	smp_ops->cause_ipi = xive_cause_ipi;
 
@@ -1263,6 +1263,8 @@ void __init xive_smp_probe(void)
 
 	/* Allocate and setup IPI for the boot CPU */
 	xive_setup_cpu_ipi(smp_processor_id());
+
+	return 0;
 }
 
 #endif /* CONFIG_SMP */
_

Patches currently in -mm which might be from [email protected] are

powerpc-xive-remove-dead-null-check-after-gfp_nofail-allocation.patch
powerpc-xive-add-error-return-value-to-xive_smp_probe.patch
powerpc-xive-fix-use-after-free-of-xive_ipis.patch
drm-remove-dead-warn_on-null-check-after-gfp_nofail-allocation.patch
lib-test_hmm-remove-dead-null-checks-after-gfp_nofail-allocations.patch
rdma-cxgb4-remove-dead-null-checks-after-gfp_nofail-allocations.patch