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authorHATAYAMA Daisuke <d.hatayama@jp.fujitsu.com>2013-07-04 02:02:17 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2013-07-04 03:07:30 +0400
commitcef2ac3f6c8ab532e49cf69d05f540931ad8ee64 (patch)
treedce89fe59f0803b2eb32a1128993e87bb542c023 /mm/vmalloc.c
parent7f614cd1e052ebbddee7ea49c725dc75fee74a5a (diff)
downloadlinux-cef2ac3f6c8ab532e49cf69d05f540931ad8ee64.tar.xz
vmalloc: make find_vm_area check in range
Currently, __find_vmap_area searches for the kernel VM area starting at a given address. This patch changes this behavior so that it searches for the kernel VM area to which the address belongs. This change is needed by remap_vmalloc_range_partial to be introduced in later patch that receives any position of kernel VM area as target address. This patch changes the condition (addr > va->va_start) to the equivalent (addr >= va->va_end) by taking advantage of the fact that each kernel VM area is non-overlapping. Signed-off-by: HATAYAMA Daisuke <d.hatayama@jp.fujitsu.com> Acked-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Vivek Goyal <vgoyal@redhat.com> Cc: Atsushi Kumagai <kumagai-atsushi@mxc.nes.nec.co.jp> Cc: Lisa Mitchell <lisa.mitchell@hp.com> Cc: Zhang Yanfei <zhangyanfei@cn.fujitsu.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.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/vmalloc.c b/mm/vmalloc.c
index d365724feb05..3875fa2f0f60 100644
--- a/mm/vmalloc.c
+++ b/mm/vmalloc.c
@@ -292,7 +292,7 @@ static struct vmap_area *__find_vmap_area(unsigned long addr)
va = rb_entry(n, struct vmap_area, rb_node);
if (addr < va->va_start)
n = n->rb_left;
- else if (addr > va->va_start)
+ else if (addr >= va->va_end)
n = n->rb_right;
else
return va;