Hi Vegard, [auto build test WARNING on usb/usb-testing] [also build test WARNING on v4.5-rc3 next-20160210] [if your patch is applied to the wrong git tree, please drop us a note to help improving the system] url: https://github.com/0day-ci/linux/commits/Vegard-Nossum/usb-add-HAS_IOMEM-dependency-to-USB_ISP116X_HCD/20160210-223436 base: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing config: um-allyesconfig (attached as .config) reproduce: # save the attached .config to linux build tree make ARCH=um All warnings (new ones prefixed by >>): In file included from include/linux/linkage.h:4:0, from include/linux/preempt.h:9, from include/linux/spinlock.h:50, from drivers/staging/rtl8723au/include/osdep_service.h:22, from drivers/staging/rtl8723au/core/rtw_cmd.c:17: include/asm-generic/fixmap.h: In function 'fix_to_virt': >> include/asm-generic/fixmap.h:31:19: warning: comparison of unsigned expression >= 0 is always true [-Wtype-limits] BUILD_BUG_ON(idx >= __end_of_fixed_addresses); ^ include/linux/compiler.h:481:19: note: in definition of macro '__compiletime_assert' bool __cond = !(condition); \ ^ include/linux/compiler.h:501:2: note: in expansion of macro '_compiletime_assert' _compiletime_assert(condition, msg, __compiletime_assert_, __LINE__) ^ include/linux/bug.h:50:37: note: in expansion of macro 'compiletime_assert' #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg) ^ include/linux/bug.h:74:2: note: in expansion of macro 'BUILD_BUG_ON_MSG' BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition) ^ >> include/asm-generic/fixmap.h:31:2: note: in expansion of macro 'BUILD_BUG_ON' BUILD_BUG_ON(idx >= __end_of_fixed_addresses); ^ In file included from include/net/checksum.h:25:0, from include/linux/skbuff.h:31, from include/linux/if_ether.h:23, from include/uapi/linux/ethtool.h:17, from include/linux/ethtool.h:16, from include/linux/netdevice.h:42, from drivers/staging/rtl8723au/include/osdep_service.h:30, from drivers/staging/rtl8723au/core/rtw_cmd.c:17: arch/um/include/asm/uaccess.h: In function '__access_ok': >> arch/um/include/asm/uaccess.h:18:29: warning: comparison of unsigned expression >= 0 is always true [-Wtype-limits] (((unsigned long) (addr) >= FIXADDR_USER_START) && \ ^ >> arch/um/include/asm/uaccess.h:48:3: note: in expansion of macro '__access_ok_vsyscall' __access_ok_vsyscall(addr, size) || ^ vim +31 include/asm-generic/fixmap.h d57c33c5 Mark Salter 2014-01-23 15 #ifndef __ASM_GENERIC_FIXMAP_H d57c33c5 Mark Salter 2014-01-23 16 #define __ASM_GENERIC_FIXMAP_H d57c33c5 Mark Salter 2014-01-23 17 d57c33c5 Mark Salter 2014-01-23 18 #include <linux/bug.h> d57c33c5 Mark Salter 2014-01-23 19 d57c33c5 Mark Salter 2014-01-23 20 #define __fix_to_virt(x) (FIXADDR_TOP - ((x) << PAGE_SHIFT)) d57c33c5 Mark Salter 2014-01-23 21 #define __virt_to_fix(x) ((FIXADDR_TOP - ((x)&PAGE_MASK)) >> PAGE_SHIFT) d57c33c5 Mark Salter 2014-01-23 22 d57c33c5 Mark Salter 2014-01-23 23 #ifndef __ASSEMBLY__ d57c33c5 Mark Salter 2014-01-23 24 /* d57c33c5 Mark Salter 2014-01-23 25 * 'index to address' translation. If anyone tries to use the idx d57c33c5 Mark Salter 2014-01-23 26 * directly without translation, we catch the bug with a NULL-deference d57c33c5 Mark Salter 2014-01-23 27 * kernel oops. Illegal ranges of incoming indices are caught too. d57c33c5 Mark Salter 2014-01-23 28 */ d57c33c5 Mark Salter 2014-01-23 29 static __always_inline unsigned long fix_to_virt(const unsigned int idx) d57c33c5 Mark Salter 2014-01-23 30 { d57c33c5 Mark Salter 2014-01-23 @31 BUILD_BUG_ON(idx >= __end_of_fixed_addresses); d57c33c5 Mark Salter 2014-01-23 32 return __fix_to_virt(idx); d57c33c5 Mark Salter 2014-01-23 33 } d57c33c5 Mark Salter 2014-01-23 34 d57c33c5 Mark Salter 2014-01-23 35 static inline unsigned long virt_to_fix(const unsigned long vaddr) d57c33c5 Mark Salter 2014-01-23 36 { d57c33c5 Mark Salter 2014-01-23 37 BUG_ON(vaddr >= FIXADDR_TOP || vaddr < FIXADDR_START); d57c33c5 Mark Salter 2014-01-23 38 return __virt_to_fix(vaddr); d57c33c5 Mark Salter 2014-01-23 39 } :::::: The code at line 31 was first introduced by commit :::::: d57c33c5daa4efa9e4d303bd0faf868080b532be add generic fixmap.h :::::: TO: Mark Salter <msalter@xxxxxxxxxx> :::::: CC: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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