Hi Al, First bad commit (maybe != root cause): tree: https://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs.git work.uaccess head: 90ccb624044e623d9a41be2b49bd017de1a8ce0b commit: 9c02566c78f0b05d078677c8a4e6f3c0ae380a69 [87/89] binfmt_flat: flat_{get,put}_addr_from_rp() should be able to fail config: blackfin-BF537-STAMP_defconfig (attached as .config) compiler: bfin-uclinux-gcc (GCC) 6.2.0 reproduce: wget https://raw.githubusercontent.com/01org/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git checkout 9c02566c78f0b05d078677c8a4e6f3c0ae380a69 # save the attached .config to linux build tree make.cross ARCH=blackfin All warnings (new ones prefixed by >>): In file included from include/linux/kernel.h:13:0, from include/linux/list.h:8, from include/linux/module.h:9, from arch/blackfin/kernel/flat.c:7: arch/blackfin/kernel/flat.c: In function 'bfin_get_addr_from_rp': include/linux/kern_levels.h:4:18: warning: format '%lx' expects argument of type 'long unsigned int', but argument 2 has type 'unsigned int' [-Wformat=] #define KERN_SOH "\001" /* ASCII Start Of Header */ ^ include/linux/printk.h:136:11: note: in definition of macro 'no_printk' printk(fmt, ##__VA_ARGS__); \ ^~~ include/linux/kern_levels.h:14:20: note: in expansion of macro 'KERN_SOH' #define KERN_DEBUG KERN_SOH "7" /* debug-level messages */ ^~~~~~~~ include/linux/printk.h:339:12: note: in expansion of macro 'KERN_DEBUG' no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__) ^~~~~~~~~~ >> arch/blackfin/kernel/flat.c:35:3: note: in expansion of macro 'pr_debug' pr_debug("*ptr = %lx", get_unaligned(ptr)); ^~~~~~~~ arch/blackfin/kernel/flat.c: In function 'bfin_put_addr_at_rp': include/linux/kern_levels.h:4:18: warning: format '%lx' expects argument of type 'long unsigned int', but argument 2 has type 'unsigned int' [-Wformat=] #define KERN_SOH "\001" /* ASCII Start Of Header */ ^ include/linux/printk.h:136:11: note: in definition of macro 'no_printk' printk(fmt, ##__VA_ARGS__); \ ^~~ include/linux/kern_levels.h:14:20: note: in expansion of macro 'KERN_SOH' #define KERN_DEBUG KERN_SOH "7" /* debug-level messages */ ^~~~~~~~ include/linux/printk.h:339:12: note: in expansion of macro 'KERN_DEBUG' no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__) ^~~~~~~~~~ arch/blackfin/kernel/flat.c:80:3: note: in expansion of macro 'pr_debug' pr_debug("new ptr =%lx", get_unaligned(ptr)); ^~~~~~~~ vim +/pr_debug +35 arch/blackfin/kernel/flat.c 9c02566c Al Viro 2017-05-02 19 u32 *persistent) 1394f032 Bryan Wu 2007-05-06 20 { 1394f032 Bryan Wu 2007-05-06 21 unsigned short *usptr = (unsigned short *)ptr; 1394f032 Bryan Wu 2007-05-06 22 int type = (relval >> 26) & 7; 9c02566c Al Viro 2017-05-02 23 u32 val; 1394f032 Bryan Wu 2007-05-06 24 1394f032 Bryan Wu 2007-05-06 25 switch (type) { 1394f032 Bryan Wu 2007-05-06 26 case FLAT_BFIN_RELOC_TYPE_16_BIT: 1394f032 Bryan Wu 2007-05-06 27 case FLAT_BFIN_RELOC_TYPE_16H_BIT: 1394f032 Bryan Wu 2007-05-06 28 usptr = (unsigned short *)ptr; 1394f032 Bryan Wu 2007-05-06 29 pr_debug("*usptr = %x", get_unaligned(usptr)); 1394f032 Bryan Wu 2007-05-06 30 val = get_unaligned(usptr); 1394f032 Bryan Wu 2007-05-06 31 val += *persistent; 1394f032 Bryan Wu 2007-05-06 32 break; 1394f032 Bryan Wu 2007-05-06 33 1394f032 Bryan Wu 2007-05-06 34 case FLAT_BFIN_RELOC_TYPE_32_BIT: 1394f032 Bryan Wu 2007-05-06 @35 pr_debug("*ptr = %lx", get_unaligned(ptr)); 1394f032 Bryan Wu 2007-05-06 36 val = get_unaligned(ptr); 1394f032 Bryan Wu 2007-05-06 37 break; 1394f032 Bryan Wu 2007-05-06 38 1394f032 Bryan Wu 2007-05-06 39 default: 1f83b8f1 Mike Frysinger 2007-07-12 40 pr_debug("BINFMT_FLAT: Unknown relocation type %x\n", type); 1394f032 Bryan Wu 2007-05-06 41 return 0; 1394f032 Bryan Wu 2007-05-06 42 } 1394f032 Bryan Wu 2007-05-06 43 :::::: The code at line 35 was first introduced by commit :::::: 1394f03221790a988afc3e4b3cb79f2e477246a9 blackfin architecture :::::: TO: Bryan Wu <bryan.wu@xxxxxxxxxx> :::::: CC: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxxxxxxxx> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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