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authorGustavo A. R. Silva <gustavo@embeddedor.com>2019-07-17 01:30:58 +0200
committerLinus Torvalds <torvalds@linux-foundation.org>2019-07-17 04:23:25 +0200
commit43e11fa2d1d3b6e35629fa556eb7d571edba2010 (patch)
treee031de3623167cd0fa10f8de744b24627885e4e8 /arch/ia64
parentmm: add account_locked_vm utility function (diff)
downloadlinux-43e11fa2d1d3b6e35629fa556eb7d571edba2010.tar.xz
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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>
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