summaryrefslogtreecommitdiff
path: root/include/linux/device-mapper.h
diff options
context:
space:
mode:
authorGustavo A. R. Silva <gustavo@embeddedor.com>2019-10-02 22:03:41 +0300
committerMike Snitzer <snitzer@redhat.com>2019-11-05 22:09:59 +0300
commit8adeac3be03d400f9c2391d52f85cd27bd188800 (patch)
treea6ed57219cb85a0474c904a93022c9001a2ed992 /include/linux/device-mapper.h
parent53be73a5d75f477e52c9275ed7aa9307a8b73e5c (diff)
downloadlinux-8adeac3be03d400f9c2391d52f85cd27bd188800.tar.xz
dm stripe: use struct_size() in kmalloc()
One of the more common cases of allocation size calculations is finding the size of a structure that has a zero-sized array at the end, along with memory for some number of elements for that array. For example: struct stripe_c { ... struct stripe stripe[0]; }; In this case alloc_context() and dm_array_too_big() are removed and replaced by the direct use of the struct_size() helper in kmalloc(). Notice that open-coded form is prone to type mistakes. This code was detected with the help of Coccinelle. Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'include/linux/device-mapper.h')
-rw-r--r--include/linux/device-mapper.h3
1 files changed, 0 insertions, 3 deletions
diff --git a/include/linux/device-mapper.h b/include/linux/device-mapper.h
index 399ad8632356..2e13826898b2 100644
--- a/include/linux/device-mapper.h
+++ b/include/linux/device-mapper.h
@@ -594,9 +594,6 @@ void *dm_vcalloc(unsigned long nmemb, unsigned long elem_size);
*/
#define dm_round_up(n, sz) (dm_div_up((n), (sz)) * (sz))
-#define dm_array_too_big(fixed, obj, num) \
- ((num) > (UINT_MAX - (fixed)) / (obj))
-
/*
* Sector offset taken relative to the start of the target instead of
* relative to the start of the device.