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authorEugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>2018-12-19 17:16:16 +0100
committerVineet Gupta <vgupta@synopsys.com>2019-01-17 23:38:00 +0100
commita3010a0465383300f909f62b8a83f83ffa7b2517 (patch)
tree29b5b2a584829f388436256379efa6ee104615b2 /arch/arc/mm/init.c
parentarc: remove redundant kernel-space generic-y (diff)
downloadlinux-a3010a0465383300f909f62b8a83f83ffa7b2517.tar.xz
linux-a3010a0465383300f909f62b8a83f83ffa7b2517.zip
ARC: adjust memblock_reserve of kernel memory
In setup_arch_memory we reserve the memory area wherein the kernel is located. Current implementation may reserve more memory than it actually required in case of CONFIG_LINUX_LINK_BASE is not equal to CONFIG_LINUX_RAM_BASE. This happens because we calculate start of the reserved region relatively to the CONFIG_LINUX_RAM_BASE and end of the region relatively to the CONFIG_LINUX_RAM_BASE. For example in case of HSDK board we wasted 256MiB of physical memory: ------------------->8------------------------------ Memory: 770416K/1048576K available (5496K kernel code, 240K rwdata, 1064K rodata, 2200K init, 275K bss, 278160K reserved, 0K cma-reserved) ------------------->8------------------------------ Fix that. Fixes: 9ed68785f7f2b ("ARC: mm: Decouple RAM base address from kernel link addr") Cc: stable@vger.kernel.org #4.14+ Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com> Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
Diffstat (limited to 'arch/arc/mm/init.c')
-rw-r--r--arch/arc/mm/init.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/arc/mm/init.c b/arch/arc/mm/init.c
index 43bf4c3a1290..e1ab2d7f1d64 100644
--- a/arch/arc/mm/init.c
+++ b/arch/arc/mm/init.c
@@ -119,7 +119,8 @@ void __init setup_arch_memory(void)
*/
memblock_add_node(low_mem_start, low_mem_sz, 0);
- memblock_reserve(low_mem_start, __pa(_end) - low_mem_start);
+ memblock_reserve(CONFIG_LINUX_LINK_BASE,
+ __pa(_end) - CONFIG_LINUX_LINK_BASE);
#ifdef CONFIG_BLK_DEV_INITRD
if (phys_initrd_size) {