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authorAnton Arapov <anton@redhat.com>2012-10-29 11:15:37 +0100
committerAnton Arapov <anton@redhat.com>2012-10-29 11:15:37 +0100
commit7d558cd9c7b18e4b16953265aa0da45e63f3b968 (patch)
tree7135d5a810768c9c619346282ee9cfdf1765e225 /arch/powerpc/sysdev/dart_iommu.c
parent985ef6b2108ed28ffd5f6630e1e0fce2e2a775f2 (diff)
downloadkernel-uprobes-f17.tar.gz
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kernel-uprobes-f17.zip
fedora kernel: cd394142aac30b5c751f25b517572e2448695641v3.6.3-2f17
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.c12
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)