linux-kernel - Re: [linux-next:master 2811/2969] lib/test-parse-integer.c:118:57: sparse: constant 4294967296 is so big it is long

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Date:	Thu, 16 Jul 2015 21:51:28 +0300
From:	Alexey Dobriyan <adobriyan@...il.com>
To:	kbuild test robot <fengguang.wu@...el.com>
Cc:	kbuild-all@...org, Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org
Subject: Re: [linux-next:master 2811/2969] lib/test-parse-integer.c:118:57:
 sparse: constant 4294967296 is so big it is long

On Thu, Jul 16, 2015 at 05:10:30PM +0800, kbuild test robot wrote:

Frankly, I don't remember why this sparse warning exists at all.
Some numbers are postfixed with ULL because gcc says something
about C99 rules and that's it.

And linux-mm has nothing to do with the code. :^)

> >> lib/test-parse-integer.c:118:57: sparse: constant 4294967296 is so big it is long
>    lib/test-parse-integer.c:119:57: sparse: constant 9223372036854775807 is so big it is long
>    lib/test-parse-integer.c:134:57: sparse: constant 040000000000 is so big it is long
>    lib/test-parse-integer.c:135:57: sparse: constant 0777777777777777777777 is so big it is long
> >> lib/test-parse-integer.c:136:57: sparse: constant 01000000000000000000000 is so big it is unsigned long
>    lib/test-parse-integer.c:137:57: sparse: constant 01777777777777777777777 is so big it is unsigned long
>    lib/test-parse-integer.c:150:49: sparse: constant 0x100000000 is so big it is long
>    lib/test-parse-integer.c:151:49: sparse: constant 0x7fffffffffffffff is so big it is long
>    lib/test-parse-integer.c:152:49: sparse: constant 0x8000000000000000 is so big it is unsigned long
>    lib/test-parse-integer.c:153:49: sparse: constant 0xffffffffffffffff is so big it is unsigned long
>    lib/test-parse-integer.c:287:50: sparse: constant 4294967296 is so big it is long
>    lib/test-parse-integer.c:301:49: sparse: constant 9223372036854775807 is so big it is long
> 
> vim +118 lib/test-parse-integer.c
> 
>    112		{"32768",			10,	5,	32768},
>    113		{"65535",			10,	5,	65535},
>    114		{"65536",			10,	5,	65536},
>    115		{"2147483647",			10,	10,	2147483647},
>    116		{"2147483648",			10,	10,	2147483648ull},
>    117		{"4294967295",			10,	10,	4294967295ull},
>  > 118		{"4294967296",			10,	10,	4294967296},
>    119		{"9223372036854775807",		10,	19,	9223372036854775807},
>    120		{"9223372036854775808",		10,	19,	9223372036854775808ull},
>    121		{"18446744073709551615",	10,	20,	18446744073709551615ull},
>    122	
>    123		{"177",				8,	3,	0177},
>    124		{"200",				8,	3,	0200},
>    125		{"377",				8,	3,	0377},
>    126		{"400",				8,	3,	0400},
>    127		{"77777",			8,	5,	077777},
>    128		{"100000",			8,	6,	0100000},
>    129		{"177777",			8,	6,	0177777},
>    130		{"200000",			8,	6,	0200000},
>    131		{"17777777777",			8,	11,	017777777777},
>    132		{"20000000000",			8,	11,	020000000000},
>    133		{"37777777777",			8,	11,	037777777777},
>    134		{"40000000000",			8,	11,	040000000000},
>    135		{"777777777777777777777",	8,	21,	0777777777777777777777},
>  > 136		{"1000000000000000000000",	8,	22,	01000000000000000000000},
>    137		{"1777777777777777777777",	8,	22,	01777777777777777777777},
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