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Some functions return NULL as an indication of failure. The style (!skb) is more common than (skb == NULL) for these functions. Found by the following Coccinelle script. @@ identifier i; statement S; @@ i = (\(kmalloc\|devm_kzalloc\|kmalloc_array\|devm_ioremap\|usb_alloc_urb\| alloc_netdev\|dev_alloc_skb\)(...)); ( -if (i == NULL) +if (!i) S | -if (NULL == i) +if (!i) S ) Signed-off-by: Meghana Madhyastha <meghana.madhyastha@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.