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isdn: avm: Fix string plus integer warning from Clang

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A recent commit in Clang expanded the -Wstring-plus-int warning, showing
some odd behavior in this file.

drivers/isdn/hardware/avm/b1.c:426:30: warning: adding 'int' to a string does not append to the string [-Wstring-plus-int]
                cinfo->version[j] = "\0\0" + 1;
                                    ~~~~~~~^~~
drivers/isdn/hardware/avm/b1.c:426:30: note: use array indexing to silence this warning
                cinfo->version[j] = "\0\0" + 1;
                                           ^
                                    &      [  ]
1 warning generated.

This is equivalent to just "\0". Nick pointed out that it is smarter to
use "" instead of "\0" because "" is used elsewhere in the kernel and
can be deduplicated at the linking stage.

Link: https://github.com/ClangBuiltLinux/linux/issues/309
Suggested-by: Nick Desaulniers <[email protected]>
Signed-off-by: Nathan Chancellor <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
This commit is contained in:
Nathan Chancellor 2019-01-09 22:41:08 -07:00 • committed by David S. Miller
commit 7afa81c55f
1 changed files with 1 additions and 1 deletions
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2
drivers/isdn/hardware/avm/b1.c
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@ -423,7 +423,7 @@ void b1_parse_version(avmctrl_info *cinfo)
int i, j;
for (j = 0; j < AVM_MAXVERSION; j++)
cinfo->version[j] = "\0\0" + 1;
cinfo->version[j] = "";
for (i = 0, j = 0;
j < AVM_MAXVERSION && i < cinfo->versionlen;
j++, i += cinfo->versionbuf[i] + 1)