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x86: make sure initmem is writable on 64-bit

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Impact: unification

This patch ports commit 3c1df68b84 ("x86: make
sure initmem is writable") to the 64-bit version to unify implementations of
free_init_pages().

Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
Cc: Arjan van de Ven <arjan@linux.intel.com>
LKML-Reference: <1236078904.2675.17.camel@penberg-laptop>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Pekka Enberg 2009-03-03 13:15:04 +02:00 • committed by Ingo Molnar
parent 05f209e7b9
commit e087edd8c0
1 changed files with 7 additions and 0 deletions
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7
arch/x86/mm/init_64.c
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@ -962,6 +962,13 @@ void free_init_pages(char *what, unsigned long begin, unsigned long end)
begin, PAGE_ALIGN(end));
set_memory_np(begin, (end - begin) >> PAGE_SHIFT);
#else
/*
* We just marked the kernel text read only above, now that
* we are going to free part of that, we need to make that
* writeable first.
*/
set_memory_rw(begin, (end - begin) >> PAGE_SHIFT);
printk(KERN_INFO "Freeing %s: %luk freed\n", what, (end - begin) >> 10);
for (; addr < end; addr += PAGE_SIZE) {