path: root/arch/powerpc/include/asm/book3s/pgalloc.h
diff options
authorAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>2016-06-08 19:55:51 +0530
committerMichael Ellerman <mpe@ellerman.id.au>2016-06-10 16:14:52 +1000
commita145abf12c9f7d30d8c330c9d8a97428cbf0589b (patch)
treefd6299b45426739853fc7b4da91fd62d7fdf3a74 /arch/powerpc/include/asm/book3s/pgalloc.h
parent36194812a4063dd2a72070aec3ee7890d135a587 (diff)
powerpc/mm/radix: Flush page walk cache when freeing page table
Even though a tlb_flush() does a flush with invalidate all cache, we can end up doing an RCU page table free before calling tlb_flush(). That means we can have page walk cache entries even after we free the page table pages. This can result in us doing wrong page table walk. Avoid this by doing pwc flush on every page table free. We can't batch the pwc flush, because the rcu call back function where we free the page table pages doesn't have information of the mmu gather. Thus we have to do a pwc on every page table page freed. Note: I also removed the dummy tlb_flush_pgtable call functions for hash 32. Fixes: 1a472c9dba6b ("powerpc/mm/radix: Add tlbflush routines") Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/include/asm/book3s/pgalloc.h')
1 files changed, 0 insertions, 5 deletions
diff --git a/arch/powerpc/include/asm/book3s/pgalloc.h b/arch/powerpc/include/asm/book3s/pgalloc.h
index 54f591e9572e..c0a69ae92256 100644
--- a/arch/powerpc/include/asm/book3s/pgalloc.h
+++ b/arch/powerpc/include/asm/book3s/pgalloc.h
@@ -4,11 +4,6 @@
#include <linux/mm.h>
extern void tlb_remove_table(struct mmu_gather *tlb, void *table);
-static inline void tlb_flush_pgtable(struct mmu_gather *tlb,
- unsigned long address)
#ifdef CONFIG_PPC64
#include <asm/book3s/64/pgalloc.h>