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authorKyle McMartin <kyle@treachery.i.cabal.ca>2008-12-22 12:29:02 -0500
committerKyle McMartin <kyle@mcmartin.ca>2009-01-05 18:15:25 +0000
commita60715f58907d4e1db7be6c31fa050c993e119b5 (patch)
tree3f625f4fd943d9f11e44abd55ff78b2d59b01d2d /arch/parisc
parent0ca5506da6795ebc700fd41cef2a7785613fbe28 (diff)
downloadop-kernel-dev-a60715f58907d4e1db7be6c31fa050c993e119b5.zip
op-kernel-dev-a60715f58907d4e1db7be6c31fa050c993e119b5.tar.gz
parisc: factor out sid to protid conversion
Create a new __space_to_prot inline to convert the space id (mmu context) to a protection id. Sadly it doesn't look like the #ifdef can be eliminated since relying on the compiler to not truncate a bit on return (ctx >> SPACEID_SHIFT) << 1; seems a little dodgy. Signed-off-by: Kyle McMartin <kyle@mcmartin.ca>
Diffstat (limited to 'arch/parisc')
-rw-r--r--arch/parisc/include/asm/mmu_context.h13
1 files changed, 9 insertions, 4 deletions
diff --git a/arch/parisc/include/asm/mmu_context.h b/arch/parisc/include/asm/mmu_context.h
index 85856c7..9302897 100644
--- a/arch/parisc/include/asm/mmu_context.h
+++ b/arch/parisc/include/asm/mmu_context.h
@@ -34,16 +34,21 @@ destroy_context(struct mm_struct *mm)
mm->context = 0;
}
-static inline void load_context(mm_context_t context)
+static inline unsigned long __space_to_prot(mm_context_t ctx)
{
- mtsp(context, 3);
#if SPACEID_SHIFT == 0
- mtctl(context << 1,8);
+ return context << 1;
#else
- mtctl(context >> (SPACEID_SHIFT - 1),8);
+ return context >> (SPACEID_SHIFT - 1);
#endif
}
+static inline void load_context(mm_context_t context)
+{
+ mtsp(context, 3);
+ mtctl(__space_to_prot(context), 8);
+}
+
static inline void switch_mm(struct mm_struct *prev, struct mm_struct *next, struct task_struct *tsk)
{
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