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kcore: use registerd physmem information

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For /proc/kcore, each arch registers its memory range by kclist_add().
In usual,

	- range of physical memory
	- range of vmalloc area
	- text, etc...

are registered but "range of physical memory" has some troubles.  It
doesn't updated at memory hotplug and it tend to include unnecessary
memory holes.  Now, /proc/iomem (kernel/resource.c) includes required
physical memory range information and it's properly updated at memory
hotplug.  Then, it's good to avoid using its own code(duplicating
information) and to rebuild kclist for physical memory based on
/proc/iomem.

Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: Jiri Slaby <jirislaby@gmail.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: WANG Cong <xiyou.wangcong@gmail.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
KAMEZAWA Hiroyuki
2009-09-22 16:45:48 -07:00
committed by Linus Torvalds
parent 908eedc616
commit 3089aa1b0c
8 changed files with 168 additions and 85 deletions
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32
arch/powerpc/mm/init_32.c
View File

@ -242,35 +242,3 @@ void free_initrd_mem(unsigned long start, unsigned long end)
}
#endif
#ifdef CONFIG_PROC_KCORE
static int __init setup_kcore(void)
{
int i;
for (i = 0; i < lmb.memory.cnt; i++) {
unsigned long base;
unsigned long size;
struct kcore_list *kcore_mem;
base = lmb.memory.region[i].base;
size = lmb.memory.region[i].size;
kcore_mem = kmalloc(sizeof(struct kcore_list), GFP_ATOMIC);
if (!kcore_mem)
panic("%s: kmalloc failed\n", __func__);
/* must stay under 32 bits */
if ( 0xfffffffful - (unsigned long)__va(base) < size) {
size = 0xfffffffful - (unsigned long)(__va(base));
printk(KERN_DEBUG "setup_kcore: restrict size=%lx\n",
size);
}
kclist_add(kcore_mem, __va(base), size, KCORE_RAM);
}
return 0;
}
module_init(setup_kcore);
#endif