Commit 5f29a77cd957
("mm: fix mixed zone detection in devm_memremap_pages")
Aligned resource limits before region_intersects() which breaks
the following with false assertions on kernel command line: memmap=4M!700M"devm_memremap_pages attempted on mixed region [ mem 0x2bc00000-0x2bfffff flags 0x200]" Memory regions 0x100000-0x2bbfffff: usable 0x2bc000000-0x2bbfffff: persistent 0x2c0000000-0x2bffffff: usable resource start: 0x2bc00000 align start: 0x28000000 resource size: 0x3fffffff align size: 0x80000000 SECTION_SIZE: 0x8000000 Now we need aligned memmap declarations based on 128M in this case eg memmap=128!640M Signed-off-by: Fabian Frederick <[email protected]> --- kernel/memremap.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/kernel/memremap.c b/kernel/memremap.c index b501e39..1bb5eec 100644 --- a/kernel/memremap.c +++ b/kernel/memremap.c @@ -296,8 +296,8 @@ void *devm_memremap_pages(struct device *dev, struct resource *res, IORESOURCE_SYSTEM_RAM, IORES_DESC_NONE); if (is_ram == REGION_MIXED) { - WARN_ONCE(1, "%s attempted on mixed region %pr\n", - __func__, res); + WARN_ONCE(1, "%s attempted on mixed region %pr or arguments not aligned to section size: %#lx\n", + __func__, res, SECTION_SIZE); return ERR_PTR(-ENXIO); } -- 2.7.4
