Subject: Re: [PATCH 1/3] dma-direct: provide the ability to reserve per-numa CMA

From: kbuild test robot <[email-masked]>
Date: Wed, 3 Jun 2020 14:55:28 +0800

Hi Barry,

I love your patch! Perhaps something to improve:

[auto build test WARNING on arm64/for-next/core]
[also build test WARNING on linus/master v5.7]
[cannot apply to hch-configfs/for-next next-20200602]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please see https://stackoverflow.com/a/37406982]

url:    https://github.com/0day-ci/linux/commits/Barry-Song/support-per-numa-CMA-for-ARM-server/20200603-104821
base:   https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-next/core
config: i386-randconfig-r033-20200602 (attached as .config)
compiler: gcc-9 (Debian 9.3.0-13) 9.3.0
reproduce (this is a W=1 build):
        # save the attached .config to linux build tree
        make W=1 ARCH=i386 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kbuild test robot <[email-masked]>

All warnings (new ones prefixed by >>, old ones prefixed by <<):

In file included from include/linux/kernel.h:15,
from include/asm-generic/bug.h:19,
from arch/x86/include/asm/bug.h:83,
from include/linux/bug.h:5,
from include/linux/mmdebug.h:5,
from include/linux/mm.h:9,
from include/linux/memblock.h:13,
from kernel/dma/contiguous.c:21:
kernel/dma/contiguous.c: In function 'dma_pernuma_cma_reserve':
>> include/linux/kern_levels.h:5:18: warning: format '%llu' expects argument of type 'long long unsigned int', but argument 3 has type 'unsigned int' [-Wformat=]
5 | #define KERN_SOH "001"  /* ASCII Start Of Header */
|                  ^~~~~~
include/linux/printk.h:137:10: note: in definition of macro 'no_printk'
137 |   printk(fmt, ##__VA_ARGS__);           |          ^~~
include/linux/kern_levels.h:15:20: note: in expansion of macro 'KERN_SOH'
15 | #define KERN_DEBUG KERN_SOH "7" /* debug-level messages */
|                    ^~~~~~~~
include/linux/printk.h:336:12: note: in expansion of macro 'KERN_DEBUG'
336 |  no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
|            ^~~~~~~~~~
kernel/dma/contiguous.c:128:3: note: in expansion of macro 'pr_debug'
128 |   pr_debug("%s: reserved %llu MiB on node %dn", __func__,
|   ^~~~~~~~
kernel/dma/contiguous.c:128:29: note: format string is defined here
128 |   pr_debug("%s: reserved %llu MiB on node %dn", __func__,
|                          ~~~^
|                             |
|                             long long unsigned int
|                          %u

vim +5 include/linux/kern_levels.h

314ba3520e513a Joe Perches 2012-07-30  4  
04d2c8c83d0e3a Joe Perches 2012-07-30 @5  #define KERN_SOH	"\001"		/* ASCII Start Of Header */
04d2c8c83d0e3a Joe Perches 2012-07-30  6  #define KERN_SOH_ASCII	'\001'
04d2c8c83d0e3a Joe Perches 2012-07-30  7  

:::::: The code at line 5 was first introduced by commit
:::::: 04d2c8c83d0e3ac5f78aeede51babb3236200112 printk: convert the format for KERN_<LEVEL> to a 2 byte pattern

:::::: TO: Joe Perches <[email-masked]>
:::::: CC: Linus Torvalds <[email-masked]>

---
0-DAY CI Kernel Test Service, Intel Corporation
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