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Building with LTO enabled reveals some functions whose prototypes in the header are different from the definition: drivers/video/fbdev/sis/sis_main.h:765:0: error: type of 'SiS_SetCH70xxANDOR' does not match original declaration [-Werror=lto-type-mismatch] extern void SiS_SetCH70xxANDOR(struct SiS_Private *SiS_Pr, unsigned short reg, drivers/video/fbdev/sis/init301.c:8937:0: note: type mismatch in parameter 4 SiS_SetCH70xxANDOR(struct SiS_Private *SiS_Pr, unsigned short reg, drivers/video/fbdev/sis/init301.c:8937:0: note: type 'short unsigned int' should match type 'unsigned char' drivers/video/fbdev/sis/init301.c:8937:0: note: 'SiS_SetCH70xxANDOR' was previously declared here The root cause appears to be the way that header files are used in this driver, where they contain both static variable and declarations for symbols in other files. To clean that up, I'm changing all mixed headers to only contain declarations the way we normally do in C, or contain only static variables, and move the rest to a more appropriate place. Once that is done, the headers can be included in the other files as well, and guarantee that the prototypes match. There are a few headers that now only contain static variables, and I'm leaving those alone here as the patch is already too big. These could be trivially moved into the respective .c files. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Cc: Thomas Winischhofer <thomas@winischhofer.net> Cc: Nicolas Pitre <nico@linaro.org> Cc: Andi Kleen <ak@linux.intel.com> Cc: "Gustavo A. R. Silva" <gustavo@embeddedor.com>, Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@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.