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a145abf12c
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: 1a472c9dba ("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>
15 lines
315 B
C
15 lines
315 B
C
#ifndef _ASM_POWERPC_BOOK3S_PGALLOC_H
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#define _ASM_POWERPC_BOOK3S_PGALLOC_H
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#include <linux/mm.h>
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extern void tlb_remove_table(struct mmu_gather *tlb, void *table);
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#ifdef CONFIG_PPC64
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#include <asm/book3s/64/pgalloc.h>
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#else
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#include <asm/book3s/32/pgalloc.h>
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#endif
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#endif /* _ASM_POWERPC_BOOK3S_PGALLOC_H */
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