diff options
| author | Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> | 2016-06-08 19:55:51 +0530 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2016-06-10 16:14:52 +1000 |
| commit | a145abf12c9f7d30d8c330c9d8a97428cbf0589b (patch) | |
| tree | fd6299b45426739853fc7b4da91fd62d7fdf3a74 /arch/powerpc/include/asm/book3s/pgalloc.h | |
| parent | 36194812a4063dd2a72070aec3ee7890d135a587 (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')
| -rw-r--r-- | arch/powerpc/include/asm/book3s/pgalloc.h | 5 |
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> |