Hi Chunfeng,

I love your patch! Perhaps something to improve:

[auto build test WARNING on usb/usb-testing]
[also build test WARNING on robh/for-next linus/master v5.12-rc4 next-20210322]
[cannot apply to mediatek/for-next]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Chunfeng-Yun/dt-bindings-usb-mtk-xhci-support-property-usb2-lpm-disable/20210322-111651
base:   https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git usb-testing
config: ia64-randconfig-r002-20210322 (attached as .config)
compiler: ia64-linux-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/0day-ci/linux/commit/6c0e65b02daf53e661d1804f081cb75fda28b916
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Chunfeng-Yun/dt-bindings-usb-mtk-xhci-support-property-usb2-lpm-disable/20210322-111651
        git checkout 6c0e65b02daf53e661d1804f081cb75fda28b916
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=ia64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

   In file included from arch/ia64/include/asm/pgtable.h:154,
                    from include/linux/pgtable.h:6,
                    from arch/ia64/include/asm/uaccess.h:40,
                    from include/linux/uaccess.h:11,
                    from arch/ia64/include/asm/sections.h:11,
                    from include/linux/interrupt.h:20,
                    from arch/ia64/include/asm/hw_irq.h:10,
                    from include/linux/irq.h:589,
                    from drivers/usb/mtu3/mtu3_host.c:12:
   arch/ia64/include/asm/mmu_context.h: In function 'reload_context':
   arch/ia64/include/asm/mmu_context.h:127:41: warning: variable 'old_rr4' set but not used [-Wunused-but-set-variable]
     127 |  unsigned long rr0, rr1, rr2, rr3, rr4, old_rr4;
         |                                         ^~~~~~~
   In file included from include/linux/bits.h:6,
                    from include/linux/bitops.h:6,
                    from include/linux/kernel.h:11,
                    from include/linux/clk.h:13,
                    from drivers/usb/mtu3/mtu3_host.c:10:
   drivers/usb/mtu3/mtu3_host.c: In function 'ssusb_wakeup_ip_sleep_set':
>> include/vdso/bits.h:7:19: warning: conversion from 'long unsigned int' to 'u32' {aka 'unsigned int'} changes value from '18446744073441120320' to '4026536000' [-Woverflow]
       7 | #define BIT(nr)   (UL(1) << (nr))
         |                   ^
   drivers/usb/mtu3/mtu3_host.c:31:19: note: in expansion of macro 'BIT'
      31 | #define WC0_IS_EN BIT(6)
         |                   ^~~
   drivers/usb/mtu3/mtu3_host.c:60:9: note: in expansion of macro 'WC0_IS_EN'
      60 |   msk = WC0_IS_EN | WC0_IS_C(0xf) | WC0_IS_P;
         |         ^~~~~~~~~


vim +7 include/vdso/bits.h

3945ff37d2f48d Vincenzo Frascino 2020-03-20  6  
3945ff37d2f48d Vincenzo Frascino 2020-03-20 @7  #define BIT(nr)			(UL(1) << (nr))
3945ff37d2f48d Vincenzo Frascino 2020-03-20  8  

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0-DAY CI Kernel Test Service, Intel Corporation
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