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| author | Joonsoo Kim <js1304@gmail.com> | 2013-04-29 15:07:28 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-04-29 15:54:33 -0700 |
| commit | db3808c1bac64740b9d830fda92801ae65f1c851 (patch) | |
| tree | 5f209495fa8865cf7283ae928f566142bb9a9c00 /mm/vmalloc.c | |
| parent | ef93247325028a35e089f3012c270379a89d052c (diff) | |
| download | linux-db3808c1bac64740b9d830fda92801ae65f1c851.tar.bz2 | |
mm, vmalloc: move get_vmalloc_info() to vmalloc.c
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@gmail.com>
Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Atsushi Kumagai <kumagai-atsushi@mxc.nes.nec.co.jp>
Cc: Chris Metcalf <cmetcalf@tilera.com>
Cc: Dave Anderson <anderson@redhat.com>
Cc: Eric Biederman <ebiederm@xmission.com>
Cc: Guan Xuetao <gxt@mprc.pku.edu.cn>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Vivek Goyal <vgoyal@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/vmalloc.c')
| -rw-r--r-- | mm/vmalloc.c | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/mm/vmalloc.c b/mm/vmalloc.c index 0f751f2068c3..1d9878b7cf52 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 |