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initramfs: poison freed initrd memory

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Various architectures including x86 poison the freed initrd memory.  Do
the same in the generic free_initrd_mem implementation and switch a few
more architectures that are identical to the generic code over to it now.

Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Christoph Hellwig <[email protected]>
Acked-by: Mike Rapoport <[email protected]>
Cc: Catalin Marinas <[email protected]>	[arm64]
Cc: Geert Uytterhoeven <[email protected]>	[m68k]
Cc: Steven Price <[email protected]>
Cc: Alexander Viro <[email protected]>
Cc: Guan Xuetao <[email protected]>
Cc: Russell King <[email protected]>
Cc: Will Deacon <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
This commit is contained in:
Christoph Hellwig 2019-05-13 17:18:37 -07:00 • committed by Linus Torvalds
commit f94f7434cb
5 changed files with 2 additions and 33 deletions
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8
arch/mips/mm/init.c
View file

@ -504,14 +504,6 @@ void free_init_pages(const char *what, unsigned long begin, unsigned long end)
printk(KERN_INFO "Freeing %s: %ldk freed\n", what, (end - begin) >> 10);
}
#ifdef CONFIG_BLK_DEV_INITRD
void free_initrd_mem(unsigned long start, unsigned long end)
{
free_reserved_area((void *)start, (void *)end, POISON_FREE_INITMEM,
"initrd");
}
#endif
void (*free_init_pages_eva)(void *begin, void *end) = NULL;
void __ref free_initmem(void)