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initramfs: move the legacy keepinitrd parameter to core code

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No need to handle the freeing disable in arch code when we already have a
core hook (and a different name for the option) for it.

Link: http://lkml.kernel.org/r/20190213174621.29297-7-hch@lst.de
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>	[arm64]
Acked-by: Mike Rapoport <rppt@linux.ibm.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>	[m68k]
Cc: Steven Price <steven.price@arm.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Guan Xuetao <gxt@pku.edu.cn>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Will Deacon <will.deacon@arm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Christoph Hellwig 2019-05-13 17:18:30 -07:00 committed by Linus Torvalds
parent afef7889c4
commit d8ae8a3765
8 changed files with 28 additions and 47 deletions
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7
arch/Kconfig
View File

@ -245,6 +245,13 @@ config ARCH_HAS_FORTIFY_SOURCE
An architecture should select this when it can successfully
build and run with CONFIG_FORTIFY_SOURCE.
#
# Select if the arch provides a historic keepinit alias for the retain_initrd
# command line option
#
config ARCH_HAS_KEEPINITRD
bool
# Select if arch has all set_memory_ro/rw/x/nx() functions in asm/cacheflush.h
config ARCH_HAS_SET_MEMORY
bool

1
arch/arm/Kconfig
View File

@ -9,6 +9,7 @@ config ARM
select ARCH_HAS_DEVMEM_IS_ALLOWED
select ARCH_HAS_ELF_RANDOMIZE
select ARCH_HAS_FORTIFY_SOURCE
select ARCH_HAS_KEEPINITRD
select ARCH_HAS_KCOV
select ARCH_HAS_MEMBARRIER_SYNC_CORE
select ARCH_HAS_PTE_SPECIAL if ARM_LPAE

25
arch/arm/mm/init.c
View File

@ -695,27 +695,14 @@ void free_initmem(void)
}
#ifdef CONFIG_BLK_DEV_INITRD
static int keep_initrd;
void free_initrd_mem(unsigned long start, unsigned long end)
{
if (!keep_initrd) {
if (start == initrd_start)
start = round_down(start, PAGE_SIZE);
if (end == initrd_end)
end = round_up(end, PAGE_SIZE);
if (start == initrd_start)
start = round_down(start, PAGE_SIZE);
if (end == initrd_end)
end = round_up(end, PAGE_SIZE);
poison_init_mem((void *)start, PAGE_ALIGN(end) - start);
free_reserved_area((void *)start, (void *)end, -1, "initrd");
}
poison_init_mem((void *)start, PAGE_ALIGN(end) - start);
free_reserved_area((void *)start, (void *)end, -1, "initrd");
}
static int __init keepinitrd_setup(char *__unused)
{
keep_initrd = 1;
return 1;
}
__setup("keepinitrd", keepinitrd_setup);
#endif

1
arch/arm64/Kconfig
View File

@ -21,6 +21,7 @@ config ARM64
select ARCH_HAS_GCOV_PROFILE_ALL
select ARCH_HAS_GIGANTIC_PAGE if (MEMORY_ISOLATION && COMPACTION) || CMA
select ARCH_HAS_KCOV
select ARCH_HAS_KEEPINITRD
select ARCH_HAS_MEMBARRIER_SYNC_CORE
select ARCH_HAS_PTE_SPECIAL
select ARCH_HAS_SETUP_DMA_OPS

17
arch/arm64/mm/init.c
View File

@ -578,24 +578,11 @@ void free_initmem(void)
}
#ifdef CONFIG_BLK_DEV_INITRD
static int keep_initrd __initdata;
void __init free_initrd_mem(unsigned long start, unsigned long end)
{
if (!keep_initrd) {
free_reserved_area((void *)start, (void *)end, 0, "initrd");
memblock_free(__virt_to_phys(start), end - start);
}
free_reserved_area((void *)start, (void *)end, 0, "initrd");
memblock_free(__virt_to_phys(start), end - start);
}
static int __init keepinitrd_setup(char *__unused)
{
keep_initrd = 1;
return 1;
}
__setup("keepinitrd", keepinitrd_setup);
#endif
/*

1
arch/unicore32/Kconfig
View File

@ -3,6 +3,7 @@ config UNICORE32
def_bool y
select ARCH_32BIT_OFF_T
select ARCH_HAS_DEVMEM_IS_ALLOWED
select ARCH_HAS_KEEPINITRD
select ARCH_MIGHT_HAVE_PC_PARPORT
select ARCH_MIGHT_HAVE_PC_SERIO
select HAVE_KERNEL_GZIP

14
arch/unicore32/mm/init.c
View File

@ -294,20 +294,8 @@ void free_initmem(void)
}
#ifdef CONFIG_BLK_DEV_INITRD
static int keep_initrd;
void free_initrd_mem(unsigned long start, unsigned long end)
{
if (!keep_initrd)
free_reserved_area((void *)start, (void *)end, -1, "initrd");
free_reserved_area((void *)start, (void *)end, -1, "initrd");
}
static int __init keepinitrd_setup(char *__unused)
{
keep_initrd = 1;
return 1;
}
__setup("keepinitrd", keepinitrd_setup);
#endif

9
init/initramfs.c
View File

@ -513,6 +513,15 @@ static int __init retain_initrd_param(char *str)
}
__setup("retain_initrd", retain_initrd_param);
#ifdef CONFIG_ARCH_HAS_KEEPINITRD
static int __init keepinitrd_setup(char *__unused)
{
do_retain_initrd = 1;
return 1;
}
__setup("keepinitrd", keepinitrd_setup);
#endif
extern char __initramfs_start[];
extern unsigned long __initramfs_size;
#include <linux/initrd.h>