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authorMax Filippov <jcmvbkbc@gmail.com>2019-11-14 03:06:42 +0300
committerMax Filippov <jcmvbkbc@gmail.com>2019-11-26 22:33:39 +0300
commite64681b487c897ec871465083bf0874087d47b66 (patch)
tree98e23d719528687833254e7b8a91a03f3475c390 /arch/xtensa
parent36de10c4788efc6efe6ff9aa10d38cb7eea4c818 (diff)
downloadlinux-e64681b487c897ec871465083bf0874087d47b66.tar.xz
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.c4
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");