From: Max Filippov Date: Thu, 14 Nov 2019 00:06:42 +0000 (-0800) Subject: xtensa: use MEMBLOCK_ALLOC_ANYWHERE for KASAN shadow map X-Git-Tag: v5.4.6~66 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=1948e76afc1202558d05bea5e2278f42b81cee10;p=platform%2Fkernel%2Flinux-rpi.git 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 Signed-off-by: Max Filippov Signed-off-by: Greg Kroah-Hartman --- diff --git a/arch/xtensa/mm/kasan_init.c b/arch/xtensa/mm/kasan_init.c index af71525..b771459 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");