diff options
| author | Will Deacon <will.deacon@arm.com> | 2014-10-29 13:03:09 +0300 |
|---|---|---|
| committer | Will Deacon <will.deacon@arm.com> | 2014-11-17 13:12:42 +0300 |
| commit | fb7332a9fedfd62b1ba6530c86f39f0fa38afd49 (patch) | |
| tree | 5e77bd4944da750634c4438df64257cdeaa58888 /arch/powerpc/mm | |
| parent | 63648dd20fa0780ab6c1e923b5c276d257422cb3 (diff) | |
| download | linux-fb7332a9fedfd62b1ba6530c86f39f0fa38afd49.tar.xz | |
mmu_gather: move minimal range calculations into generic code
On architectures with hardware broadcasting of TLB invalidation messages
, it makes sense to reduce the range of the mmu_gather structure when
unmapping page ranges based on the dirty address information passed to
tlb_remove_tlb_entry.
arm64 already does this by directly manipulating the start/end fields
of the gather structure, but this confuses the generic code which
does not expect these fields to change and can end up calculating
invalid, negative ranges when forcing a flush in zap_pte_range.
This patch moves the minimal range calculation out of the arm64 code
and into the generic implementation, simplifying zap_pte_range in the
process (which no longer needs to care about start/end, since they will
point to the appropriate ranges already). With the range being tracked
by core code, the need_flush flag is dropped in favour of checking that
the end of the range has actually been set.
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Russell King - ARM Linux <linux@arm.linux.org.uk>
Cc: Michal Simek <monstr@monstr.eu>
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Diffstat (limited to 'arch/powerpc/mm')
| -rw-r--r-- | arch/powerpc/mm/hugetlbpage.c | 2 |
1 files changed, 0 insertions, 2 deletions
diff --git a/arch/powerpc/mm/hugetlbpage.c b/arch/powerpc/mm/hugetlbpage.c index 7e70ae968e5f..6a4a5fcb9730 100644 --- a/arch/powerpc/mm/hugetlbpage.c +++ b/arch/powerpc/mm/hugetlbpage.c @@ -517,8 +517,6 @@ static void free_hugepd_range(struct mmu_gather *tlb, hugepd_t *hpdp, int pdshif for (i = 0; i < num_hugepd; i++, hpdp++) hpdp->pd = 0; - tlb->need_flush = 1; - #ifdef CONFIG_PPC_FSL_BOOK3E hugepd_free(tlb, hugepte); #else |