Re: [PATCH v3 7/7] vga: Optimise console scrolling

From: kbuild test robot
Date: Sun Mar 26 2017 - 05:54:28 EST

Hi Matthew,

[auto build test ERROR on linus/master]
[also build test ERROR on v4.11-rc3 next-20170324]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url: https://github.com/0day-ci/linux/commits/Matthew-Wilcox/Add-memsetN-functions/20170326-140108
config: mips-defconfig (attached as .config)
compiler: mips-linux-gnu-gcc (Debian 6.1.1-9) 6.1.1 20160705
reproduce:
wget https://raw.githubusercontent.com/01org/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# save the attached .config to linux build tree
make.cross ARCH=mips

All errors (new ones prefixed by >>):

In file included from include/linux/selection.h:11:0,
from drivers/video/console/newport_con.c:16:
include/linux/vt_buffer.h: In function 'scr_memsetw':
>> include/linux/vt_buffer.h:34:2: error: implicit declaration of function 'memset16' [-Werror=implicit-function-declaration]
memset16(s, c, count / 2);
^~~~~~~~
include/linux/vt_buffer.h: In function 'scr_memcpyw':
>> include/linux/vt_buffer.h:47:2: error: implicit declaration of function 'memcpy' [-Werror=implicit-function-declaration]
memcpy(d, s, count);
^~~~~~
include/linux/vt_buffer.h: In function 'scr_memmovew':
>> include/linux/vt_buffer.h:66:2: error: implicit declaration of function 'memmove' [-Werror=implicit-function-declaration]
memmove(d, s, count);
^~~~~~~
In file included from include/linux/string.h:18:0,
from include/linux/bitmap.h:8,
from include/linux/cpumask.h:11,
from arch/mips/include/asm/processor.h:15,
from arch/mips/include/asm/thread_info.h:15,
from include/linux/thread_info.h:25,
from include/asm-generic/preempt.h:4,
from ./arch/mips/include/generated/asm/preempt.h:1,
from include/linux/preempt.h:80,
from include/linux/spinlock.h:50,
from include/linux/wait.h:8,
from include/linux/fs.h:5,
from include/linux/tty.h:4,
from include/linux/vt_kern.h:11,
from drivers/video/console/newport_con.c:18:
arch/mips/include/asm/string.h: At top level:
>> arch/mips/include/asm/string.h:138:14: error: conflicting types for 'memcpy'
extern void *memcpy(void *__to, __const__ void *__from, size_t __n);
^~~~~~
In file included from include/linux/selection.h:11:0,
from drivers/video/console/newport_con.c:16:
include/linux/vt_buffer.h:47:2: note: previous implicit declaration of 'memcpy' was here
memcpy(d, s, count);
^~~~~~
In file included from include/linux/string.h:18:0,
from include/linux/bitmap.h:8,
from include/linux/cpumask.h:11,
from arch/mips/include/asm/processor.h:15,
from arch/mips/include/asm/thread_info.h:15,
from include/linux/thread_info.h:25,
from include/asm-generic/preempt.h:4,
from ./arch/mips/include/generated/asm/preempt.h:1,
from include/linux/preempt.h:80,
from include/linux/spinlock.h:50,
from include/linux/wait.h:8,
from include/linux/fs.h:5,
from include/linux/tty.h:4,
from include/linux/vt_kern.h:11,
from drivers/video/console/newport_con.c:18:
>> arch/mips/include/asm/string.h:141:14: error: conflicting types for 'memmove'
extern void *memmove(void *__dest, __const__ void *__src, size_t __n);
^~~~~~~
In file included from include/linux/selection.h:11:0,
from drivers/video/console/newport_con.c:16:
include/linux/vt_buffer.h:66:2: note: previous implicit declaration of 'memmove' was here
memmove(d, s, count);
^~~~~~~
In file included from include/linux/bitmap.h:8:0,
from include/linux/cpumask.h:11,
from arch/mips/include/asm/processor.h:15,
from arch/mips/include/asm/thread_info.h:15,
from include/linux/thread_info.h:25,
from include/asm-generic/preempt.h:4,
from ./arch/mips/include/generated/asm/preempt.h:1,
from include/linux/preempt.h:80,
from include/linux/spinlock.h:50,
from include/linux/wait.h:8,
from include/linux/fs.h:5,
from include/linux/tty.h:4,
from include/linux/vt_kern.h:11,
from drivers/video/console/newport_con.c:18:
include/linux/string.h:104:14: error: conflicting types for 'memset16'
extern void *memset16(uint16_t *, uint16_t, __kernel_size_t);
^~~~~~~~
In file included from include/linux/selection.h:11:0,
from drivers/video/console/newport_con.c:16:
include/linux/vt_buffer.h:34:2: note: previous implicit declaration of 'memset16' was here
memset16(s, c, count / 2);
^~~~~~~~
cc1: some warnings being treated as errors

vim +/memset16 +34 include/linux/vt_buffer.h

28 {
29 #ifdef VT_BUF_HAVE_RW
30 count /= 2;
31 while (count--)
32 scr_writew(c, s++);
33 #else
> 34 memset16(s, c, count / 2);
35 #endif
36 }
37 #endif
38
39 #ifndef VT_BUF_HAVE_MEMCPYW
40 static inline void scr_memcpyw(u16 *d, const u16 *s, unsigned int count)
41 {
42 #ifdef VT_BUF_HAVE_RW
43 count /= 2;
44 while (count--)
45 scr_writew(scr_readw(s++), d++);
46 #else
> 47 memcpy(d, s, count);
48 #endif
49 }
50 #endif
51
52 #ifndef VT_BUF_HAVE_MEMMOVEW
53 static inline void scr_memmovew(u16 *d, const u16 *s, unsigned int count)
54 {
55 #ifdef VT_BUF_HAVE_RW
56 if (d < s)
57 scr_memcpyw(d, s, count);
58 else {
59 count /= 2;
60 d += count;
61 s += count;
62 while (count--)
63 scr_writew(scr_readw(--s), --d);
64 }
65 #else
> 66 memmove(d, s, count);
67 #endif
68 }
69 #endif

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