From mboxrd@z Thu Jan 1 00:00:00 1970 From: fengguang.wu@intel.com (kbuild test robot) Date: Thu, 13 Oct 2016 21:26:03 +0800 Subject: [arm-soc:to-build 4/4] include/linux/buffer_head.h:340:16: warning: 'bno' may be used uninitialized in this function Message-ID: <201610132148.TWDi70Ia%fengguang.wu@intel.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org tree: https://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc.git to-build head: 346c22ea9cb8d0ee331c73529b205414e43a4655 commit: 346c22ea9cb8d0ee331c73529b205414e43a4655 [4/4] Revert "Disable "maybe-uninitialized" warning globally" config: blackfin-BF526-EZBRD_defconfig (attached as .config) compiler: bfin-uclinux-gcc (GCC) 6.2.0 reproduce: wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git checkout 346c22ea9cb8d0ee331c73529b205414e43a4655 # save the attached .config to linux build tree make.cross ARCH=blackfin Note: it may well be a FALSE warning. FWIW you are at least aware of it now. http://gcc.gnu.org/wiki/Better_Uninitialized_Warnings All warnings (new ones prefixed by >>): In file included from fs/ext2/inode.c:32:0: fs/ext2/inode.c: In function 'ext2_get_block': >> include/linux/buffer_head.h:340:16: warning: 'bno' may be used uninitialized in this function [-Wmaybe-uninitialized] bh->b_blocknr = block; ~~~~~~~~~~~~~~^~~~~~~ fs/ext2/inode.c:783:6: note: 'bno' was declared here u32 bno; ^~~ vim +/bno +340 include/linux/buffer_head.h bd7ade3c Nikolay Borisov 2015-07-02 324 sb_getblk_gfp(struct super_block *sb, sector_t block, gfp_t gfp) bd7ade3c Nikolay Borisov 2015-07-02 325 { bd7ade3c Nikolay Borisov 2015-07-02 326 return __getblk_gfp(sb->s_bdev, block, sb->s_blocksize, gfp); bd7ade3c Nikolay Borisov 2015-07-02 327 } bd7ade3c Nikolay Borisov 2015-07-02 328 ^1da177e Linus Torvalds 2005-04-16 329 static inline struct buffer_head * ^1da177e Linus Torvalds 2005-04-16 330 sb_find_get_block(struct super_block *sb, sector_t block) ^1da177e Linus Torvalds 2005-04-16 331 { ^1da177e Linus Torvalds 2005-04-16 332 return __find_get_block(sb->s_bdev, block, sb->s_blocksize); ^1da177e Linus Torvalds 2005-04-16 333 } ^1da177e Linus Torvalds 2005-04-16 334 ^1da177e Linus Torvalds 2005-04-16 335 static inline void ^1da177e Linus Torvalds 2005-04-16 336 map_bh(struct buffer_head *bh, struct super_block *sb, sector_t block) ^1da177e Linus Torvalds 2005-04-16 337 { ^1da177e Linus Torvalds 2005-04-16 338 set_buffer_mapped(bh); ^1da177e Linus Torvalds 2005-04-16 339 bh->b_bdev = sb->s_bdev; ^1da177e Linus Torvalds 2005-04-16 @340 bh->b_blocknr = block; b0cf2321 Badari Pulavarty 2006-03-26 341 bh->b_size = sb->s_blocksize; ^1da177e Linus Torvalds 2005-04-16 342 } ^1da177e Linus Torvalds 2005-04-16 343 ^1da177e Linus Torvalds 2005-04-16 344 static inline void wait_on_buffer(struct buffer_head *bh) ^1da177e Linus Torvalds 2005-04-16 345 { ^1da177e Linus Torvalds 2005-04-16 346 might_sleep(); a9877cc2 Richard Kennedy 2010-08-09 347 if (buffer_locked(bh)) ^1da177e Linus Torvalds 2005-04-16 348 __wait_on_buffer(bh); :::::: The code at line 340 was first introduced by commit :::::: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Linux-2.6.12-rc2 :::::: TO: Linus Torvalds :::::: CC: Linus Torvalds --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation -------------- next part -------------- A non-text attachment was scrubbed... Name: .config.gz Type: application/gzip Size: 14504 bytes Desc: not available URL: