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initramfs: Provide a common initrd reserve function

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Some architectures(eg, ARM and riscv) have similar logic to
check and reserve the memory of initrd, let's provide a common
function reserve_initrd_mem() to reduce duplicated code.

Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>
This commit is contained in:
Kefeng Wang 2021-01-15 13:46:04 +08:00 • committed by Palmer Dabbelt
parent fade5cad93
commit c72160fe05
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2 changed files with 51 additions and 0 deletions
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6
include/linux/initrd.h
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@ -18,6 +18,12 @@ extern int initrd_below_start_ok;
extern unsigned long initrd_start, initrd_end;
extern void free_initrd_mem(unsigned long, unsigned long);
#ifdef CONFIG_BLK_DEV_INITRD
extern void __init reserve_initrd_mem(void);
#else
static inline void __init reserve_initrd_mem(void) {}
#endif
extern phys_addr_t phys_initrd_start;
extern unsigned long phys_initrd_size;