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CRIS: Update init memory handling

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- Add free_initrd_mem as found by Guenter Roeck <linux@roeck-us.net>
- Add free_init_pages
- Export empty_zero_page symbol

Signed-off-by: Jesper Nilsson <jesper.nilsson@axis.com>
This commit is contained in:
Jesper Nilsson 2014-10-07 13:03:17 +02:00
parent d6517c4c19
commit 80d6170a28
1 changed files with 33 additions and 5 deletions
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38
arch/cris/mm/init.c
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@ -11,13 +11,15 @@
#include <linux/gfp.h> #include <linux/gfp.h>
#include <linux/init.h> #include <linux/init.h>
#include <linux/bootmem.h> #include <linux/bootmem.h>
#include <linux/proc_fs.h>
#include <linux/kcore.h>
#include <asm/tlb.h> #include <asm/tlb.h>
#include <asm/sections.h> #include <asm/sections.h>
unsigned long empty_zero_page; unsigned long empty_zero_page;
EXPORT_SYMBOL(empty_zero_page);
void __init void __init mem_init(void)
mem_init(void)
{ {
BUG_ON(!mem_map); BUG_ON(!mem_map);
@ -31,10 +33,36 @@ mem_init(void)
mem_init_print_info(NULL); mem_init_print_info(NULL);
} }
/* free the pages occupied by initialization code */ /* Free a range of init pages. Virtual addresses. */
void void free_init_pages(const char *what, unsigned long begin, unsigned long end)
free_initmem(void) {
unsigned long addr;
for (addr = begin; addr < end; addr += PAGE_SIZE) {
ClearPageReserved(virt_to_page(addr));
init_page_count(virt_to_page(addr));
free_page(addr);
totalram_pages++;
}
printk(KERN_INFO "Freeing %s: %ldk freed\n", what, (end - begin) >> 10);
}
/* Free the pages occupied by initialization code. */
void free_initmem(void)
{ {
free_initmem_default(-1); free_initmem_default(-1);
} }
/* Free the pages occupied by initrd code. */
#ifdef CONFIG_BLK_DEV_INITRD
void free_initrd_mem(unsigned long start, unsigned long end)
{
free_init_pages("initrd memory",
start,
end);
}
#endif