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author | Gustavo A. R. Silva <gustavo@embeddedor.com> | 2019-07-17 01:30:58 +0200 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2019-07-17 04:23:25 +0200 |
commit | 43e11fa2d1d3b6e35629fa556eb7d571edba2010 (patch) | |
tree | e031de3623167cd0fa10f8de744b24627885e4e8 /arch/ia64 | |
parent | mm: add account_locked_vm utility function (diff) | |
download | linux-43e11fa2d1d3b6e35629fa556eb7d571edba2010.tar.xz linux-43e11fa2d1d3b6e35629fa556eb7d571edba2010.zip |
fs/select.c: 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 foo {
int stuff;
struct boo entry[];
};
size = sizeof(struct foo) + count * sizeof(struct boo);
instance = kmalloc(size, GFP_KERNEL);
Instead of leaving these open-coded and prone to type mistakes, we can now
use the new struct_size() helper:
instance = kmalloc(struct_size(instance, entry, count), GFP_KERNEL);
Also, notice that variable size is unnecessary, hence it is removed.
This code was detected with the help of Coccinelle.
Link: http://lkml.kernel.org/r/20190604164226.GA13823@embeddedor
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/ia64')
0 files changed, 0 insertions, 0 deletions