kcore: add kclist types

Presently, kclist_add() only eats start address and size as its arguments.
Considering to make kclist dynamically reconfigulable, it's necessary to
know which kclists are for System RAM and which are not.

This patch add kclist types as
  KCORE_RAM
  KCORE_VMALLOC
  KCORE_TEXT
  KCORE_OTHER

This "type" is used in a patch following this for detecting KCORE_RAM.

Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: WANG Cong <xiyou.wangcong@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

9 files changed, 36 insertions, 22 deletions

diff --git a/arch/ia64/mm/init.c b/arch/ia64/mm/init.c
index 1d286244a562..f6a3c21a2826 100644
--- a/arch/ia64/mm/init.c
+++ b/arch/ia64/mm/init.c
@@ -639,9 +639,10 @@ mem_init (void)
 
         high_memory = __va(max_low_pfn * PAGE_SIZE);
 
-        kclist_add(&kcore_mem, __va(0), max_low_pfn * PAGE_SIZE);
-        kclist_add(&kcore_vmem, (void *)VMALLOC_START, VMALLOC_END-VMALLOC_START);
-        kclist_add(&kcore_kernel, _stext, _end - _stext);
+        kclist_add(&kcore_mem, __va(0), max_low_pfn * PAGE_SIZE, KCORE_RAM);
+        kclist_add(&kcore_vmem, (void *)VMALLOC_START,
+                        VMALLOC_END-VMALLOC_START, KCORE_VMALLOC);
+        kclist_add(&kcore_kernel, _stext, _end - _stext, KCORE_TEXT);
 
         for_each_online_pgdat(pgdat)
                 if (pgdat->bdata->node_bootmem_map)
diff --git a/arch/mips/mm/init.c b/arch/mips/mm/init.c
index 1f4ee4797a6e..f8661985bff6 100644
--- a/arch/mips/mm/init.c
+++ b/arch/mips/mm/init.c
@@ -409,11 +409,12 @@ void __init mem_init(void)
         if ((unsigned long) &_text > (unsigned long) CKSEG0)
                 /* The -4 is a hack so that user tools don't have to handle
                    the overflow.  */
-                kclist_add(&kcore_kseg0, (void *) CKSEG0, 0x80000000 - 4);
+                kclist_add(&kcore_kseg0, (void *) CKSEG0,
+                                0x80000000 - 4, KCORE_TEXT);
 #endif
-        kclist_add(&kcore_mem, __va(0), max_low_pfn << PAGE_SHIFT);
+        kclist_add(&kcore_mem, __va(0), max_low_pfn << PAGE_SHIFT, KCORE_RAM);
         kclist_add(&kcore_vmalloc, (void *)VMALLOC_START,
-                   VMALLOC_END-VMALLOC_START);
+                   VMALLOC_END-VMALLOC_START, KCORE_VMALLOC);
 
         printk(KERN_INFO "Memory: %luk/%luk available (%ldk kernel code, "
                "%ldk reserved, %ldk data, %ldk init, %ldk highmem)\n",
diff --git a/arch/powerpc/mm/init_32.c b/arch/powerpc/mm/init_32.c
index 3ef5084b90ca..e91add90ec54 100644
--- a/arch/powerpc/mm/init_32.c
+++ b/arch/powerpc/mm/init_32.c
@@ -268,11 +268,11 @@ static int __init setup_kcore(void)
                                                 size);
                 }
 
-                kclist_add(kcore_mem, __va(base), size);
+                kclist_add(kcore_mem, __va(base), size, KCORE_RAM);
         }
 
         kclist_add(&kcore_vmem, (void *)VMALLOC_START,
-                VMALLOC_END-VMALLOC_START);
+                VMALLOC_END-VMALLOC_START, KCORE_VMALLOC);
 
         return 0;
 }
diff --git a/arch/powerpc/mm/init_64.c b/arch/powerpc/mm/init_64.c
index 31582329cd67..9ee563101b56 100644
--- a/arch/powerpc/mm/init_64.c
+++ b/arch/powerpc/mm/init_64.c
@@ -128,10 +128,11 @@ static int __init setup_kcore(void)
                 if (!kcore_mem)
                         panic("%s: kmalloc failed\n", __func__);
 
-                kclist_add(kcore_mem, __va(base), size);
+                kclist_add(kcore_mem, __va(base), size, KCORE_RAM);
         }
 
-        kclist_add(&kcore_vmem, (void *)VMALLOC_START, VMALLOC_END-VMALLOC_START);
+        kclist_add(&kcore_vmem, (void *)VMALLOC_START,
+                VMALLOC_END-VMALLOC_START, KCORE_VMALLOC);
 
         return 0;
 }
diff --git a/arch/sh/mm/init.c b/arch/sh/mm/init.c
index fabb7c6f48d2..ef56c9f9d7ba 100644
--- a/arch/sh/mm/init.c
+++ b/arch/sh/mm/init.c
@@ -226,9 +226,9 @@ void __init mem_init(void)
         datasize =  (unsigned long) &_edata - (unsigned long) &_etext;
         initsize =  (unsigned long) &__init_end - (unsigned long) &__init_begin;
 
-        kclist_add(&kcore_mem, __va(0), max_low_pfn << PAGE_SHIFT);
+        kclist_add(&kcore_mem, __va(0), max_low_pfn << PAGE_SHIFT, KCORE_RAM);
         kclist_add(&kcore_vmalloc, (void *)VMALLOC_START,
-                   VMALLOC_END - VMALLOC_START);
+                   VMALLOC_END - VMALLOC_START, KCORE_VMALLOC);
 
         printk(KERN_INFO "Memory: %luk/%luk available (%dk kernel code, "
                "%dk data, %dk init)\n",
diff --git a/arch/x86/mm/init_32.c b/arch/x86/mm/init_32.c
index b49b4f67453d..2cbc40112932 100644
--- a/arch/x86/mm/init_32.c
+++ b/arch/x86/mm/init_32.c
@@ -886,9 +886,9 @@ void __init mem_init(void)
         datasize =  (unsigned long) &_edata - (unsigned long) &_etext;
         initsize =  (unsigned long) &__init_end - (unsigned long) &__init_begin;
 
-        kclist_add(&kcore_mem, __va(0), max_low_pfn << PAGE_SHIFT);
+        kclist_add(&kcore_mem, __va(0), max_low_pfn << PAGE_SHIFT, KCORE_RAM);
         kclist_add(&kcore_vmalloc, (void *)VMALLOC_START,
-                   VMALLOC_END-VMALLOC_START);
+                   VMALLOC_END-VMALLOC_START, KCORE_VMALLOC);
 
         printk(KERN_INFO "Memory: %luk/%luk available (%dk kernel code, "
                         "%dk reserved, %dk data, %dk init, %ldk highmem)\n",
diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c
index 810bd31e7f5f..c05810b614fe 100644
--- a/arch/x86/mm/init_64.c
+++ b/arch/x86/mm/init_64.c
@@ -677,13 +677,14 @@ void __init mem_init(void)
         initsize =  (unsigned long) &__init_end - (unsigned long) &__init_begin;
 
         /* Register memory areas for /proc/kcore */
-        kclist_add(&kcore_mem, __va(0), max_low_pfn << PAGE_SHIFT);
+        kclist_add(&kcore_mem, __va(0), max_low_pfn << PAGE_SHIFT, KCORE_RAM);
         kclist_add(&kcore_vmalloc, (void *)VMALLOC_START,
-                   VMALLOC_END-VMALLOC_START);
-        kclist_add(&kcore_kernel, &_stext, _end - _stext);
-        kclist_add(&kcore_modules, (void *)MODULES_VADDR, MODULES_LEN);
+                   VMALLOC_END-VMALLOC_START, KCORE_VMALLOC);
+        kclist_add(&kcore_kernel, &_stext, _end - _stext, KCORE_TEXT);
+        kclist_add(&kcore_modules, (void *)MODULES_VADDR, MODULES_LEN,
+                        KCORE_OTHER);
         kclist_add(&kcore_vsyscall, (void *)VSYSCALL_START,
-                                 VSYSCALL_END - VSYSCALL_START);
+                         VSYSCALL_END - VSYSCALL_START, KCORE_OTHER);
 
         printk(KERN_INFO "Memory: %luk/%luk available (%ldk kernel code, "
                          "%ldk absent, %ldk reserved, %ldk data, %ldk init)\n",
diff --git a/fs/proc/kcore.c b/fs/proc/kcore.c
index f9327e51ce99..659c1635db81 100644
--- a/fs/proc/kcore.c
+++ b/fs/proc/kcore.c
@@ -62,10 +62,11 @@ static LIST_HEAD(kclist_head);
 static DEFINE_RWLOCK(kclist_lock);
 
 void
-kclist_add(struct kcore_list *new, void *addr, size_t size)
+kclist_add(struct kcore_list *new, void *addr, size_t size, int type)
 {
         new->addr = (unsigned long)addr;
         new->size = size;
+        new->type = type;
 
         write_lock(&kclist_lock);
         list_add_tail(&new->list, &kclist_head);
diff --git a/include/linux/proc_fs.h b/include/linux/proc_fs.h
index 0aff2a62eba9..bd7b840765a0 100644
--- a/include/linux/proc_fs.h
+++ b/include/linux/proc_fs.h
@@ -78,10 +78,18 @@ struct proc_dir_entry {
         struct list_head pde_openers;   /* who did ->open, but not ->release */
 };
 
+enum kcore_type {
+        KCORE_TEXT,
+        KCORE_VMALLOC,
+        KCORE_RAM,
+        KCORE_OTHER,
+};
+
 struct kcore_list {
         struct list_head list;
         unsigned long addr;
         size_t size;
+        int type;
 };
 
 struct vmcore {
@@ -233,11 +241,12 @@ static inline void dup_mm_exe_file(struct mm_struct *oldmm,
 #endif /* CONFIG_PROC_FS */
 
 #if !defined(CONFIG_PROC_KCORE)
-static inline void kclist_add(struct kcore_list *new, void *addr, size_t size)
+static inline void
+kclist_add(struct kcore_list *new, void *addr, size_t size, int type)
 {
 }
 #else
-extern void kclist_add(struct kcore_list *, void *, size_t);
+extern void kclist_add(struct kcore_list *, void *, size_t, int type);
 #endif
 
 union proc_op {