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authorKumar Gala <galak@kernel.crashing.org>2008-11-19 05:53:24 +0000
committerPaul Mackerras <paulus@samba.org>2008-12-03 20:46:35 +1100
commitdf3b8611554e389e703fa753540289874fa5126c (patch)
tree19b02efa50c28fbece905bd9fe2dc6c6ae6fcfd5 /arch/powerpc/include/asm/highmem.h
parentf4f3a1261ad70988ad45614ebc87e553143a332b (diff)
powerpc: Add a local_flush_tlb_page to handle kmap_atomic invalidates
The tlb invalidates in kmap_atomic/kunmap_atomic can be called from IRQ context, however they are only local invalidates (on the processor that the kmap was called on). In the future we want to use IPIs to do tlb invalidates this causes issue since flush_tlb_page() is considered a broadcast invalidate. Add local_flush_tlb_page() as a non-broadcast invalidate and use it in kmap_atomic() since we don't have enough information in the flush_tlb_page() call to determine its local. Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/powerpc/include/asm/highmem.h')
-rw-r--r--arch/powerpc/include/asm/highmem.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/powerpc/include/asm/highmem.h b/arch/powerpc/include/asm/highmem.h
index 91c589520c0a..7dc52eca8b67 100644
--- a/arch/powerpc/include/asm/highmem.h
+++ b/arch/powerpc/include/asm/highmem.h
@@ -85,7 +85,7 @@ static inline void *kmap_atomic_prot(struct page *page, enum km_type type, pgpro
BUG_ON(!pte_none(*(kmap_pte-idx)));
#endif
__set_pte_at(&init_mm, vaddr, kmap_pte-idx, mk_pte(page, prot));
- flush_tlb_page(NULL, vaddr);
+ local_flush_tlb_page(vaddr);
return (void*) vaddr;
}
@@ -113,7 +113,7 @@ static inline void kunmap_atomic(void *kvaddr, enum km_type type)
* this pte without first remap it
*/
pte_clear(&init_mm, vaddr, kmap_pte-idx);
- flush_tlb_page(NULL, vaddr);
+ local_flush_tlb_page(vaddr);
#endif
pagefault_enable();
}