The patch titled
ia64: allow smp_call_function_single() to current cpu
has been added to the -mm tree. Its filename is
ia64-allow-smp_call_function_single-to-current-cpu.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: ia64: allow smp_call_function_single() to current cpu
From: Avi Kivity <avi@xxxxxxxxxxxx>
This removes the requirement for callers to get_cpu() to check in simple
cases. i386 and x86_64 already received a similar treatment.
Signed-off-by: Avi Kivity <avi@xxxxxxxxxxxx>
Cc: "Luck, Tony" <tony.luck@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/ia64/kernel/smp.c | 8 +++++---
1 files changed, 5 insertions(+), 3 deletions(-)
diff -puN arch/ia64/kernel/smp.c~ia64-allow-smp_call_function_single-to-current-cpu arch/ia64/kernel/smp.c
--- a/arch/ia64/kernel/smp.c~ia64-allow-smp_call_function_single-to-current-cpu
+++ a/arch/ia64/kernel/smp.c
@@ -346,7 +346,7 @@ smp_flush_tlb_mm (struct mm_struct *mm)
}
/*
- * Run a function on another CPU
+ * Run a function on a specific CPU
* <func> The function to run. This must be fast and non-blocking.
* <info> An arbitrary pointer to pass to the function.
* <nonatomic> Currently unused.
@@ -366,9 +366,11 @@ smp_call_function_single (int cpuid, voi
int me = get_cpu(); /* prevent preemption and reschedule on another processor */
if (cpuid == me) {
- printk(KERN_INFO "%s: trying to call self\n", __FUNCTION__);
+ local_irq_disable();
+ func(info);
+ local_irq_enable();
put_cpu();
- return -EBUSY;
+ return 0;
}
data.func = func;
_
Patches currently in -mm which might be from avi@xxxxxxxxxxxx are
origin.patch
ia64-allow-smp_call_function_single-to-current-cpu.patch
git-kvm.patch
-
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