lkml.org 
[lkml]   [2014]   [Nov]   [24]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH v7 05/12] mm: slub: introduce virt_to_obj function.
Date
virt_to_obj takes kmem_cache address, address of slab page,
address x pointing somewhere inside slab object,
and returns address of the begging of object.

Signed-off-by: Andrey Ryabinin <a.ryabinin@samsung.com>
---
include/linux/slub_def.h | 5 +++++
1 file changed, 5 insertions(+)

diff --git a/include/linux/slub_def.h b/include/linux/slub_def.h
index d82abd4..c75bc1d 100644
--- a/include/linux/slub_def.h
+++ b/include/linux/slub_def.h
@@ -110,4 +110,9 @@ static inline void sysfs_slab_remove(struct kmem_cache *s)
}
#endif

+static inline void *virt_to_obj(struct kmem_cache *s, void *slab_page, void *x)
+{
+ return x - ((x - slab_page) % s->size);
+}
+
#endif /* _LINUX_SLUB_DEF_H */
--
2.1.3


\
 
 \ /
  Last update: 2014-11-24 19:41    [W:0.688 / U:0.324 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site