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| author |   Max Filippov <jcmvbkbc@gmail.com> | 2019-11-13 16:06:42 -0800 |
|---|---|---|
| committer | Max Filippov <jcmvbkbc@gmail.com> | 2019-11-26 11:33:39 -0800 |
| commit | e64681b487c897ec871465083bf0874087d47b66 (patch) | |
| tree | 98e23d719528687833254e7b8a91a03f3475c390 /arch/xtensa | |
| parent | xtensa: fix TLB sanity checker (diff) | |
| download | wireguard-linux-e64681b487c897ec871465083bf0874087d47b66.tar.xz wireguard-linux-e64681b487c897ec871465083bf0874087d47b66.zip | |
xtensa: use MEMBLOCK_ALLOC_ANYWHERE for KASAN shadow map
KASAN shadow map doesn't need to be accessible through the linear kernel
mapping, allocate its pages with MEMBLOCK_ALLOC_ANYWHERE so that high
memory can be used. This frees up to ~100MB of low memory on xtensa
configurations with KASAN and high memory.
Cc: stable@vger.kernel.org # v5.1+
Fixes: f240ec09bb8a ("memblock: replace memblock_alloc_base(ANYWHERE) with memblock_phys_alloc")
Reviewed-by: Mike Rapoport <rppt@linux.ibm.com>
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Diffstat (limited to 'arch/xtensa')
| -rw-r--r-- | arch/xtensa/mm/kasan_init.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/arch/xtensa/mm/kasan_init.c b/arch/xtensa/mm/kasan_init.c index 9c957791bb33..e3baa21ff24c 100644 --- a/arch/xtensa/mm/kasan_init.c +++ b/arch/xtensa/mm/kasan_init.c @@ -60,7 +60,9 @@ static void __init populate(void *start, void *end) for (k = 0; k < PTRS_PER_PTE; ++k, ++j) { phys_addr_t phys = - memblock_phys_alloc(PAGE_SIZE, PAGE_SIZE); + memblock_phys_alloc_range(PAGE_SIZE, PAGE_SIZE, + 0, + MEMBLOCK_ALLOC_ANYWHERE); if (!phys) panic("Failed to allocate page table page\n"); |