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authorJunhua Huang2019-07-06 14:41:15 +0800
committerWill Deacon2019-08-05 12:35:34 +0100
commit13776f9d40a028a245bb766269e360f5b7a62721 (patch)
tree9df6c442578a46f10b18c318da3e3279de9e4c9a /arch/arm64/mm
parent22ec71615d824f4f11d38d0e55a88d8956b7e45f (diff)
arm64: mm: free the initrd reserved memblock in a aligned manner
We should free the initrd reserved memblock in an aligned manner, because the initrd reserves the memblock in an aligned manner in arm64_memblock_init(). Otherwise there are some fragments in memblock_reserved regions after free_initrd_mem(). e.g.: /sys/kernel/debug/memblock # cat reserved 0: 0x0000000080080000..0x00000000817fafff 1: 0x0000000083400000..0x0000000083ffffff 2: 0x0000000090000000..0x000000009000407f 3: 0x00000000b0000000..0x00000000b000003f 4: 0x00000000b26184ea..0x00000000b2618fff The fragments like the ranges from b0000000 to b000003f and from b26184ea to b2618fff should be freed. And we can do free_reserved_area() after memblock_free(), as free_reserved_area() calls __free_pages(), once we've done that it could be allocated somewhere else, but memblock and iomem still say this is reserved memory. Fixes: 05c58752f9dc ("arm64: To remove initrd reserved area entry from memblock") Signed-off-by: Junhua Huang <huang.junhua@zte.com.cn> Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'arch/arm64/mm')
-rw-r--r--arch/arm64/mm/init.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c
index f3c795278def..b1ee6cb4b17f 100644
--- a/arch/arm64/mm/init.c
+++ b/arch/arm64/mm/init.c
@@ -570,8 +570,12 @@ void free_initmem(void)
#ifdef CONFIG_BLK_DEV_INITRD
void __init free_initrd_mem(unsigned long start, unsigned long end)
{
+ unsigned long aligned_start, aligned_end;
+
+ aligned_start = __virt_to_phys(start) & PAGE_MASK;
+ aligned_end = PAGE_ALIGN(__virt_to_phys(end));
+ memblock_free(aligned_start, aligned_end - aligned_start);
free_reserved_area((void *)start, (void *)end, 0, "initrd");
- memblock_free(__virt_to_phys(start), end - start);
}
#endif