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| author | Toshihiro HANAWA <hanawa@ccs.tsukuba.ac.jp> | 2009-10-02 17:52:54 +0900 |
|---|---|---|
| committer | Hirokazu Takata <takata@linux-m32r.org> | 2009-10-04 12:02:37 +0900 |
| commit | 0a3d31b79e7fa600108e699805e2b2f9ea1f3194 (patch) | |
| tree | 3c2f761d0a8f4cfbbff08ee3753f44f4ac7349ab /arch | |
| parent | 6b6fabce5ac47668a2c2d9a14f1cdcc23c4ed896 (diff) | |
| download | linux-0a3d31b79e7fa600108e699805e2b2f9ea1f3194.tar.gz linux-0a3d31b79e7fa600108e699805e2b2f9ea1f3194.tar.bz2 linux-0a3d31b79e7fa600108e699805e2b2f9ea1f3194.zip | |
m32r: Fix IPI function calls for SMP
This patch fixes the m32r SMP kernel after 2.6.27.
A part of the following patch breaks m32r SMP operation.
> m32r: convert to generic helpers for IPI function calls
> commit 7b7426c8a615cf61df9a77b9df7d5b75d91e3fa0
In the above patch, a CALL_FUNC_SINGLE_IPI was newly introduced,
but the its IPI vector number was wrong in the patch code.
The m32r SMP kernel hanged-up during boot operation, because
the CPU_BOOT_IPI was called instead of CALL_FUNC_SINGLE_IPI
(CPU_BOOT_IPI had no side effect at that time because the 2nd
core had already been started up),
as a result, csd_unlock() was not called, then a dead lock
occurred in csd_lock_wait() after the detection of Compact Flash
memory as IDE generic disk.
Signed-off-by: Toshihiro HANAWA <hanawa@ccs.tsukuba.ac.jp>
Signed-off-by: Hirokazu Takata <takata@linux-m32r.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/m32r/kernel/traps.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/m32r/kernel/traps.c b/arch/m32r/kernel/traps.c index 03b14e55cd89..fbd109031df3 100644 --- a/arch/m32r/kernel/traps.c +++ b/arch/m32r/kernel/traps.c @@ -104,8 +104,8 @@ static void set_eit_vector_entries(void) eit_vector[186] = (unsigned long)smp_call_function_interrupt; eit_vector[187] = (unsigned long)smp_ipi_timer_interrupt; eit_vector[188] = (unsigned long)smp_flush_cache_all_interrupt; - eit_vector[189] = (unsigned long)smp_call_function_single_interrupt; - eit_vector[190] = 0; + eit_vector[189] = 0; /* CPU_BOOT_IPI */ + eit_vector[190] = (unsigned long)smp_call_function_single_interrupt; eit_vector[191] = 0; #endif _flush_cache_copyback_all(); |