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ANDROID: GKI: Export memblock_free to drivers

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On architectures that support the preservation of memblock metadata
after __init, allow drivers to call memblock_free() to free a
reservation made by early arch code. This is a hack to support the
freeing of bootsplash reservations passed to Linux by the bootloader.

(This should be reworked in future versions of Android; do not
cherry-pick this patch forward.)

Bug: 139653858
Bug: 174620135
Change-Id: I32c0ee70c33c94deff70aa548896caa9978396fb
Signed-off-by: Alistair Delva <adelva@google.com>
(cherry picked from commit 2eeee9f41c0cddbc300d9b89bba6d498998b2498)
This commit is contained in:
Alistair Delva
2020-06-04 09:29:56 -07:00
committed by Todd Kjos
parent 6c96f52eb0
commit 3654b006f0
1 changed files with 3 additions and 0 deletions
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mm/memblock.c
+3
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@@ -924,6 +924,9 @@ int __init_memblock memblock_phys_free(phys_addr_t base, phys_addr_t size)
kmemleak_free_part_phys(base, size); kmemleak_free_part_phys(base, size);
return memblock_remove_range(&memblock.reserved, base, size); return memblock_remove_range(&memblock.reserved, base, size);
} }
#ifdef CONFIG_ARCH_KEEP_MEMBLOCK
EXPORT_SYMBOL_GPL(memblock_free);
#endif
int __init_memblock memblock_reserve(phys_addr_t base, phys_addr_t size) int __init_memblock memblock_reserve(phys_addr_t base, phys_addr_t size)
{ {