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Message-Id: <1363156381-2881-3-git-send-email-iamjoonsoo.kim@lge.com>
Date: Wed, 13 Mar 2013 15:32:54 +0900
From: Joonsoo Kim <iamjoonsoo.kim@....com>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: linux-kernel@...r.kernel.org, linux-mm@...ck.org,
Dave Anderson <anderson@...hat.com>,
Atsushi Kumagai <kumagai-atsushi@....nes.nec.co.jp>,
Vivek Goyal <vgoyal@...hat.com>, Bob Liu <lliubbo@...il.com>,
Pekka Enberg <penberg@...nel.org>, kexec@...ts.infradead.org,
Joonsoo Kim <js1304@...il.com>,
Joonsoo Kim <iamjoonsoo.kim@....com>
Subject: [PATCH v2 2/8] mm, vmalloc: move get_vmalloc_info() to vmalloc.c
From: Joonsoo Kim <js1304@...il.com>
Now get_vmalloc_info() is in fs/proc/mmu.c. There is no reason
that this code must be here and it's implementation needs vmlist_lock
and it iterate a vmlist which may be internal data structure for vmalloc.
It is preferable that vmlist_lock and vmlist is only used in vmalloc.c
for maintainability. So move the code to vmalloc.c
Signed-off-by: Joonsoo Kim <js1304@...il.com>
Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@....com>
diff --git a/fs/proc/Makefile b/fs/proc/Makefile
index 712f24d..ab30716 100644
--- a/fs/proc/Makefile
+++ b/fs/proc/Makefile
@@ -5,7 +5,7 @@
obj-y += proc.o
proc-y := nommu.o task_nommu.o
-proc-$(CONFIG_MMU) := mmu.o task_mmu.o
+proc-$(CONFIG_MMU) := task_mmu.o
proc-y += inode.o root.o base.o generic.o array.o \
fd.o
diff --git a/fs/proc/internal.h b/fs/proc/internal.h
index 85ff3a4..7571035 100644
--- a/fs/proc/internal.h
+++ b/fs/proc/internal.h
@@ -30,24 +30,6 @@ extern int proc_net_init(void);
static inline int proc_net_init(void) { return 0; }
#endif
-struct vmalloc_info {
- unsigned long used;
- unsigned long largest_chunk;
-};
-
-#ifdef CONFIG_MMU
-#define VMALLOC_TOTAL (VMALLOC_END - VMALLOC_START)
-extern void get_vmalloc_info(struct vmalloc_info *vmi);
-#else
-
-#define VMALLOC_TOTAL 0UL
-#define get_vmalloc_info(vmi) \
-do { \
- (vmi)->used = 0; \
- (vmi)->largest_chunk = 0; \
-} while(0)
-#endif
-
extern int proc_tid_stat(struct seq_file *m, struct pid_namespace *ns,
struct pid *pid, struct task_struct *task);
extern int proc_tgid_stat(struct seq_file *m, struct pid_namespace *ns,
diff --git a/fs/proc/meminfo.c b/fs/proc/meminfo.c
index 1efaaa1..5aa847a 100644
--- a/fs/proc/meminfo.c
+++ b/fs/proc/meminfo.c
@@ -11,6 +11,7 @@
#include <linux/swap.h>
#include <linux/vmstat.h>
#include <linux/atomic.h>
+#include <linux/vmalloc.h>
#include <asm/page.h>
#include <asm/pgtable.h>
#include "internal.h"
diff --git a/fs/proc/mmu.c b/fs/proc/mmu.c
deleted file mode 100644
index 8ae221d..0000000
--- a/fs/proc/mmu.c
+++ /dev/null
@@ -1,60 +0,0 @@
-/* mmu.c: mmu memory info files
- *
- * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
- * Written by David Howells (dhowells@...hat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- */
-#include <linux/spinlock.h>
-#include <linux/vmalloc.h>
-#include <linux/highmem.h>
-#include <asm/pgtable.h>
-#include "internal.h"
-
-void get_vmalloc_info(struct vmalloc_info *vmi)
-{
- struct vm_struct *vma;
- unsigned long free_area_size;
- unsigned long prev_end;
-
- vmi->used = 0;
-
- if (!vmlist) {
- vmi->largest_chunk = VMALLOC_TOTAL;
- }
- else {
- vmi->largest_chunk = 0;
-
- prev_end = VMALLOC_START;
-
- read_lock(&vmlist_lock);
-
- for (vma = vmlist; vma; vma = vma->next) {
- unsigned long addr = (unsigned long) vma->addr;
-
- /*
- * Some archs keep another range for modules in vmlist
- */
- if (addr < VMALLOC_START)
- continue;
- if (addr >= VMALLOC_END)
- break;
-
- vmi->used += vma->size;
-
- free_area_size = addr - prev_end;
- if (vmi->largest_chunk < free_area_size)
- vmi->largest_chunk = free_area_size;
-
- prev_end = vma->size + addr;
- }
-
- if (VMALLOC_END - prev_end > vmi->largest_chunk)
- vmi->largest_chunk = VMALLOC_END - prev_end;
-
- read_unlock(&vmlist_lock);
- }
-}
diff --git a/include/linux/vmalloc.h b/include/linux/vmalloc.h
index 6071e91..698b1e5 100644
--- a/include/linux/vmalloc.h
+++ b/include/linux/vmalloc.h
@@ -158,4 +158,22 @@ pcpu_free_vm_areas(struct vm_struct **vms, int nr_vms)
# endif
#endif
+struct vmalloc_info {
+ unsigned long used;
+ unsigned long largest_chunk;
+};
+
+#ifdef CONFIG_MMU
+#define VMALLOC_TOTAL (VMALLOC_END - VMALLOC_START)
+extern void get_vmalloc_info(struct vmalloc_info *vmi);
+#else
+
+#define VMALLOC_TOTAL 0UL
+#define get_vmalloc_info(vmi) \
+do { \
+ (vmi)->used = 0; \
+ (vmi)->largest_chunk = 0; \
+} while (0)
+#endif
+
#endif /* _LINUX_VMALLOC_H */
diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index 0f751f2..1d9878b 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -2645,5 +2645,49 @@ static int __init proc_vmalloc_init(void)
return 0;
}
module_init(proc_vmalloc_init);
+
+void get_vmalloc_info(struct vmalloc_info *vmi)
+{
+ struct vm_struct *vma;
+ unsigned long free_area_size;
+ unsigned long prev_end;
+
+ vmi->used = 0;
+
+ if (!vmlist) {
+ vmi->largest_chunk = VMALLOC_TOTAL;
+ } else {
+ vmi->largest_chunk = 0;
+
+ prev_end = VMALLOC_START;
+
+ read_lock(&vmlist_lock);
+
+ for (vma = vmlist; vma; vma = vma->next) {
+ unsigned long addr = (unsigned long) vma->addr;
+
+ /*
+ * Some archs keep another range for modules in vmlist
+ */
+ if (addr < VMALLOC_START)
+ continue;
+ if (addr >= VMALLOC_END)
+ break;
+
+ vmi->used += vma->size;
+
+ free_area_size = addr - prev_end;
+ if (vmi->largest_chunk < free_area_size)
+ vmi->largest_chunk = free_area_size;
+
+ prev_end = vma->size + addr;
+ }
+
+ if (VMALLOC_END - prev_end > vmi->largest_chunk)
+ vmi->largest_chunk = VMALLOC_END - prev_end;
+
+ read_unlock(&vmlist_lock);
+ }
+}
#endif
--
1.7.9.5
--
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