Hi Andrew,
As discussed just now, please drop:
redefine-unregister_hotcpu_notifier-hotplug_cpu.patch
and apply the patch below instead.
Satyam
[PATCH] Redefine {un}register_hotcpu_notifier() !HOTPLUG_CPU stubs
The return of the present "do {} while" based stub definition of
register_hotcpu_notifier() cannot be checked. This makes the stub
asymmetric w.r.t. the real HOTPLUG_CPU=y implementation that is
int-returning. So let us redefine this to be consistent with the
full version. Also do the same for unregister_hotcpu_notifier().
We cannot define these as static inline functions due to an existing
GCC bug (#33172). So define as macros that return appropriately
instead (int '0' for the register_hotcpu_notifier case and void for
unregister_hotcpu_notifier).
Signed-off-by: Satyam Sharma <[email protected]>
---
include/linux/cpu.h | 5 +++--
1 files changed, 3 insertions(+), 2 deletions(-)
diff --git a/include/linux/cpu.h b/include/linux/cpu.h
index 1d5ded0..2ffcef5 100644
--- a/include/linux/cpu.h
+++ b/include/linux/cpu.h
@@ -119,8 +119,9 @@ static inline void cpuhotplug_mutex_unlock(struct mutex *cpu_hp_mutex)
#define lock_cpu_hotplug() do { } while (0)
#define unlock_cpu_hotplug() do { } while (0)
#define hotcpu_notifier(fn, pri) do { (void)(fn); } while (0)
-#define register_hotcpu_notifier(nb) do { (void)(nb); } while (0)
-#define unregister_hotcpu_notifier(nb) do { (void)(nb); } while (0)
+/* These aren't inline functions due to a GCC bug. */
+#define register_hotcpu_notifier(nb) ({ (void)(nb); 0; })
+#define unregister_hotcpu_notifier(nb) ({ (void)(nb); })
/* CPUs don't go offline once they're online w/o CONFIG_HOTPLUG_CPU */
static inline int cpu_is_offline(int cpu) { return 0; }
-
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