kcore: use registerd physmem information

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>

2 files changed, 0 insertions, 58 deletions

diff --git a/arch/powerpc/mm/init_32.c b/arch/powerpc/mm/init_32.c
index 38a450d16b27..9ddcfb4dc139 100644
--- a/arch/powerpc/mm/init_32.c
+++ b/arch/powerpc/mm/init_32.c
@@ -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
diff --git a/arch/powerpc/mm/init_64.c b/arch/powerpc/mm/init_64.c
index 87ef492a1a5d..335c578b9cc3 100644
--- a/arch/powerpc/mm/init_64.c
+++ b/arch/powerpc/mm/init_64.c
@@ -109,32 +109,6 @@ 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, size;
-                struct kcore_list *kcore_mem;
-
-                base = lmb.memory.region[i].base;
-                size = lmb.memory.region[i].size;
-
-                /* GFP_ATOMIC to avoid might_sleep warnings during boot */
-                kcore_mem = kmalloc(sizeof(struct kcore_list), GFP_ATOMIC);
-                if (!kcore_mem)
-                        panic("%s: kmalloc failed\n", __func__);
-
-                kclist_add(kcore_mem, __va(base), size, KCORE_RAM);
-        }
-
-        return 0;
-}
-module_init(setup_kcore);
-#endif
-
 static void pgd_ctor(void *addr)
 {
         memset(addr, 0, PGD_TABLE_SIZE);