diff options
| author | Max Filippov <jcmvbkbc@gmail.com> | 2019-11-13 16:06:42 -0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-12-21 11:04:33 +0100 |
| commit | 1948e76afc1202558d05bea5e2278f42b81cee10 (patch) | |
| tree | 26b3ac168c6b221c08d7081bdc78e54dea3fc4af /arch/xtensa | |
| parent | 06ad673b6c585581a68e7b0059cf89ca9de67ab0 (diff) | |
xtensa: use MEMBLOCK_ALLOC_ANYWHERE for KASAN shadow map
commit e64681b487c897ec871465083bf0874087d47b66 upstream.
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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 af7152560bc3..b771459778fe 100644 --- a/arch/xtensa/mm/kasan_init.c +++ b/arch/xtensa/mm/kasan_init.c @@ -56,7 +56,9 @@ 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"); |