Commit 800a85d3 authored Oct 24, 2014 by Laurent Pinchart Committed by Marek Szyprowski Oct 27, 2014

mm: cma: Always consider a 0 base address reservation as dynamic

The fixed parameter to cma_declare_contiguous() tells the function
whether the given base address must be honoured or should be considered
as a hint only. The API considers a zero base address as meaning any
base address, which must never be considered as a fixed value.

Part of the implementation correctly checks both fixed and base != 0,
but two locations check the fixed value only. Set fixed to false when
base is 0 to fix that and simplify the code.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Acked-by: Michal Nazarewicz <mina86@mina86.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>

parent f022d8cb

mm/cma.c

+4 −1

Original line number	Diff line number	Diff line
		@@ -245,6 +245,9 @@ int __init cma_declare_contiguous(phys_addr_t base,
		size = ALIGN(size, alignment);
		limit &= ~(alignment - 1);

		if (!base)
		fixed = false;

		/* size should be aligned with order_per_bit */
		if (!IS_ALIGNED(size >> PAGE_SHIFT, 1 << order_per_bit))
		return -EINVAL;
		@@ -268,7 +271,7 @@ int __init cma_declare_contiguous(phys_addr_t base,
		}

		/* Reserve memory */
		if (base && fixed) {
		if (fixed) {
		if (memblock_is_region_reserved(base, size) \|\|
		memblock_reserve(base, size) < 0) {
		ret = -EBUSY;