• Gustavo A. R. Silva's avatar
    dmaengine: tegra210-adma: Use struct_size() in devm_kzalloc() · 863326a6
    Gustavo A. R. Silva authored
    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;
        void *entry[];
    };
    
    instance = devm_kzalloc(dev, sizeof(struct foo) + sizeof(void *) * count, GFP_KERNEL);
    
    Instead of leaving these open-coded and prone to type mistakes, we can
    now use the new struct_size() helper:
    
    instance = devm_kzalloc(dev, struct_size(instance, entry, count), GFP_KERNEL);
    
    This code was detected with the help of Coccinelle.
    Signed-off-by: default avatarGustavo A. R. Silva <gustavo@embeddedor.com>
    Signed-off-by: default avatarVinod Koul <vkoul@kernel.org>
    863326a6
tegra210-adma.c 20.5 KB