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Older compilers like gcc-4.6 may run into a case that returns an uninitialized variable from rcar_drif_enable_rx() if that function was ever called with an empty cur_ch_mask: drivers/media/platform/rcar_drif.c:658:2: error: ‘ret’ may be used uninitialized in this function [-Werror=uninitialized] Newer compilers don't have that problem as they optimize the 'ret' variable away and just return zero in that case. This changes the function to return -EINVAL for this particular failure, to make it consistent across all compiler versions. In case gcc gets changed to report a warning for it in the future, it's also a good idea to shut it up now. Link: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82203 Signed-off-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Ramesh Shanmugasundaram <ramesh.shanmugasundaram@bp.renesas.com> Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com> |
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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.