The patch titled
Let smp_call_function_single return -EBUSY on UP
has been added to the -mm tree. Its filename is
let-smp_call_function_single-return-ebusy-on-up.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: Let smp_call_function_single return -EBUSY on UP
From: Heiko Carstens <heiko.carstens@xxxxxxxxxx>
All architectures that have an implementation of smp_call_function_single
let it return -EBUSY if it is asked to execute func on the current cpu.
(akpm: except for x86_64). Therefore the UP version must always return
-EBUSY.
Signed-off-by: Heiko Carstens <heiko.carstens@xxxxxxxxxx>
Cc: Andi Kleen <ak@xxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/smp.h | 6 ++----
1 files changed, 2 insertions(+), 4 deletions(-)
diff -puN include/linux/smp.h~let-smp_call_function_single-return-ebusy-on-up include/linux/smp.h
--- a/include/linux/smp.h~let-smp_call_function_single-return-ebusy-on-up
+++ a/include/linux/smp.h
@@ -99,11 +99,9 @@ static inline void smp_send_reschedule(i
#define num_booting_cpus() 1
#define smp_prepare_boot_cpu() do {} while (0)
static inline int smp_call_function_single(int cpuid, void (*func) (void *info),
- void *info, int retry, int wait)
+ void *info, int retry, int wait)
{
- /* Disable interrupts here? */
- func(info);
- return 0;
+ return -EBUSY;
}
#endif /* !SMP */
_
Patches currently in -mm which might be from heiko.carstens@xxxxxxxxxx are
s390-spinlock-initializer-cleanup.patch
simplify-compat_sys_timerfd.patch
let-smp_call_function_single-return-ebusy-on-up.patch
-
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