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| author | Anton Arapov <anton@redhat.com> | 2012-10-29 11:15:37 +0100 |
|---|---|---|
| committer | Anton Arapov <anton@redhat.com> | 2012-10-29 11:15:37 +0100 |
| commit | 7d558cd9c7b18e4b16953265aa0da45e63f3b968 (patch) | |
| tree | 7135d5a810768c9c619346282ee9cfdf1765e225 /arch/powerpc/sysdev/dart_iommu.c | |
| parent | 985ef6b2108ed28ffd5f6630e1e0fce2e2a775f2 (diff) | |
| download | kernel-uprobes-7d558cd9c7b18e4b16953265aa0da45e63f3b968.tar.gz kernel-uprobes-7d558cd9c7b18e4b16953265aa0da45e63f3b968.tar.xz kernel-uprobes-7d558cd9c7b18e4b16953265aa0da45e63f3b968.zip | |
Signed-off-by: Anton Arapov <anton@redhat.com>
Diffstat (limited to 'arch/powerpc/sysdev/dart_iommu.c')
| -rw-r--r-- | arch/powerpc/sysdev/dart_iommu.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/arch/powerpc/sysdev/dart_iommu.c b/arch/powerpc/sysdev/dart_iommu.c index 4f2680f431b..b68b0db17b3 100644 --- a/arch/powerpc/sysdev/dart_iommu.c +++ b/arch/powerpc/sysdev/dart_iommu.c @@ -74,11 +74,16 @@ static int dart_is_u4; #define DBG(...) +static DEFINE_SPINLOCK(invalidate_lock); + static inline void dart_tlb_invalidate_all(void) { unsigned long l = 0; unsigned int reg, inv_bit; unsigned long limit; + unsigned long flags; + + spin_lock_irqsave(&invalidate_lock, flags); DBG("dart: flush\n"); @@ -111,12 +116,17 @@ retry: panic("DART: TLB did not flush after waiting a long " "time. Buggy U3 ?"); } + + spin_unlock_irqrestore(&invalidate_lock, flags); } static inline void dart_tlb_invalidate_one(unsigned long bus_rpn) { unsigned int reg; unsigned int l, limit; + unsigned long flags; + + spin_lock_irqsave(&invalidate_lock, flags); reg = DART_CNTL_U4_ENABLE | DART_CNTL_U4_IONE | (bus_rpn & DART_CNTL_U4_IONE_MASK); @@ -138,6 +148,8 @@ wait_more: panic("DART: TLB did not flush after waiting a long " "time. Buggy U4 ?"); } + + spin_unlock_irqrestore(&invalidate_lock, flags); } static void dart_flush(struct iommu_table *tbl) |