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Date: Mon, 18 Nov 2019 15:12:14 +0800
From: kbuild test robot <lkp@...el.com>
To: Corentin Labbe <clabbe.montjoie@...il.com>
Cc: kbuild-all@...ts.01.org, davem@...emloft.net,
herbert@...dor.apana.org.au, mripard@...nel.org, wens@...e.org,
linux-arm-kernel@...ts.infradead.org, linux-crypto@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-sunxi@...glegroups.com,
Corentin Labbe <clabbe.montjoie@...il.com>
Subject: Re: [PATCH 2/2] crypto: sun4i-ss: remove dependency on not 64BIT
Hi Corentin,
I love your patch! Perhaps something to improve:
[auto build test WARNING on cryptodev/master]
[also build test WARNING on next-20191115]
[cannot apply to v5.4-rc8]
[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/Corentin-Labbe/crypto-sun4i-ss-Fix-64-bit-size_t-warnings-on-sun4i-ss-hash-c/20191114-211327
base: https://git.kernel.org/pub/scm/linux/kernel/git/herbert/cryptodev-2.6.git master
config: arm64-allyesconfig (attached as .config)
compiler: aarch64-linux-gcc (GCC) 7.4.0
reproduce:
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# save the attached .config to linux build tree
GCC_VERSION=7.4.0 make.cross ARCH=arm64
If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <lkp@...el.com>
All warnings (new ones prefixed by >>):
In file included from include/linux/clk.h:13:0,
from drivers/crypto/allwinner/sun4i-ss/sun4i-ss.h:14,
from drivers/crypto/allwinner/sun4i-ss/sun4i-ss-cipher.c:13:
drivers/crypto/allwinner/sun4i-ss/sun4i-ss-cipher.c: In function 'sun4i_ss_opti_poll':
include/linux/kernel.h:842:29: warning: comparison of distinct pointer types lacks a cast
(!!(sizeof((typeof(x) *)1 == (typeof(y) *)1)))
^
include/linux/kernel.h:856:4: note: in expansion of macro '__typecheck'
(__typecheck(x, y) && __no_side_effects(x, y))
^~~~~~~~~~~
include/linux/kernel.h:866:24: note: in expansion of macro '__safe_cmp'
__builtin_choose_expr(__safe_cmp(x, y), \
^~~~~~~~~~
include/linux/kernel.h:875:19: note: in expansion of macro '__careful_cmp'
#define min(x, y) __careful_cmp(x, y, <)
^~~~~~~~~~~~~
>> include/linux/kernel.h:890:23: note: in expansion of macro 'min'
#define min3(x, y, z) min((typeof(x))min(x, y), z)
^~~
>> drivers/crypto/allwinner/sun4i-ss/sun4i-ss-cipher.c:75:10: note: in expansion of macro 'min3'
todo = min3(rx_cnt, ileft, (mi.length - oi) / 4);
^~~~
include/linux/kernel.h:842:29: warning: comparison of distinct pointer types lacks a cast
(!!(sizeof((typeof(x) *)1 == (typeof(y) *)1)))
^
include/linux/kernel.h:856:4: note: in expansion of macro '__typecheck'
(__typecheck(x, y) && __no_side_effects(x, y))
^~~~~~~~~~~
include/linux/kernel.h:866:24: note: in expansion of macro '__safe_cmp'
__builtin_choose_expr(__safe_cmp(x, y), \
^~~~~~~~~~
include/linux/kernel.h:875:19: note: in expansion of macro '__careful_cmp'
#define min(x, y) __careful_cmp(x, y, <)
^~~~~~~~~~~~~
>> include/linux/kernel.h:890:23: note: in expansion of macro 'min'
#define min3(x, y, z) min((typeof(x))min(x, y), z)
^~~
drivers/crypto/allwinner/sun4i-ss/sun4i-ss-cipher.c:90:10: note: in expansion of macro 'min3'
todo = min3(tx_cnt, oleft, (mo.length - oo) / 4);
^~~~
drivers/crypto/allwinner/sun4i-ss/sun4i-ss-cipher.c: In function 'sun4i_ss_cipher_poll':
include/linux/kernel.h:842:29: warning: comparison of distinct pointer types lacks a cast
(!!(sizeof((typeof(x) *)1 == (typeof(y) *)1)))
^
include/linux/kernel.h:856:4: note: in expansion of macro '__typecheck'
(__typecheck(x, y) && __no_side_effects(x, y))
^~~~~~~~~~~
include/linux/kernel.h:866:24: note: in expansion of macro '__safe_cmp'
__builtin_choose_expr(__safe_cmp(x, y), \
^~~~~~~~~~
include/linux/kernel.h:875:19: note: in expansion of macro '__careful_cmp'
#define min(x, y) __careful_cmp(x, y, <)
^~~~~~~~~~~~~
>> include/linux/kernel.h:890:23: note: in expansion of macro 'min'
#define min3(x, y, z) min((typeof(x))min(x, y), z)
^~~
drivers/crypto/allwinner/sun4i-ss/sun4i-ss-cipher.c:242:11: note: in expansion of macro 'min3'
todo = min3(rx_cnt, ileft / 4, (mi.length - oi) / 4);
^~~~
include/linux/kernel.h:842:29: warning: comparison of distinct pointer types lacks a cast
(!!(sizeof((typeof(x) *)1 == (typeof(y) *)1)))
^
include/linux/kernel.h:856:4: note: in expansion of macro '__typecheck'
(__typecheck(x, y) && __no_side_effects(x, y))
^~~~~~~~~~~
include/linux/kernel.h:866:24: note: in expansion of macro '__safe_cmp'
__builtin_choose_expr(__safe_cmp(x, y), \
^~~~~~~~~~
include/linux/kernel.h:875:19: note: in expansion of macro '__careful_cmp'
#define min(x, y) __careful_cmp(x, y, <)
^~~~~~~~~~~~~
>> include/linux/kernel.h:890:23: note: in expansion of macro 'min'
#define min3(x, y, z) min((typeof(x))min(x, y), z)
^~~
drivers/crypto/allwinner/sun4i-ss/sun4i-ss-cipher.c:256:12: note: in expansion of macro 'min3'
todo = min3(rx_cnt * 4 - ob, ileft,
^~~~
In file included from include/linux/printk.h:332:0,
from include/linux/kernel.h:15,
from include/linux/clk.h:13,
from drivers/crypto/allwinner/sun4i-ss/sun4i-ss.h:14,
from drivers/crypto/allwinner/sun4i-ss/sun4i-ss-cipher.c:13:
>> drivers/crypto/allwinner/sun4i-ss/sun4i-ss-cipher.c:277:20: warning: format '%u' expects argument of type 'unsigned int', but argument 6 has type 'size_t {aka long unsigned int}' [-Wformat=]
dev_dbg(ss->dev, "%x %u/%u %u/%u cnt=%u %u/%u %u/%u cnt=%u %u\n",
^
include/linux/dynamic_debug.h:125:15: note: in definition of macro '__dynamic_func_call'
func(&id, ##__VA_ARGS__); \
^~~~~~~~~~~
include/linux/dynamic_debug.h:157:2: note: in expansion of macro '_dynamic_func_call'
_dynamic_func_call(fmt,__dynamic_dev_dbg, \
^~~~~~~~~~~~~~~~~~
include/linux/device.h:1751:2: note: in expansion of macro 'dynamic_dev_dbg'
dynamic_dev_dbg(dev, dev_fmt(fmt), ##__VA_ARGS__)
^~~~~~~~~~~~~~~
include/linux/device.h:1751:23: note: in expansion of macro 'dev_fmt'
dynamic_dev_dbg(dev, dev_fmt(fmt), ##__VA_ARGS__)
^~~~~~~
>> drivers/crypto/allwinner/sun4i-ss/sun4i-ss-cipher.c:277:3: note: in expansion of macro 'dev_dbg'
dev_dbg(ss->dev, "%x %u/%u %u/%u cnt=%u %u/%u %u/%u cnt=%u %u\n",
^~~~~~~
drivers/crypto/allwinner/sun4i-ss/sun4i-ss-cipher.c:277:20: warning: format '%u' expects argument of type 'unsigned int', but argument 11 has type 'size_t {aka long unsigned int}' [-Wformat=]
dev_dbg(ss->dev, "%x %u/%u %u/%u cnt=%u %u/%u %u/%u cnt=%u %u\n",
^
include/linux/dynamic_debug.h:125:15: note: in definition of macro '__dynamic_func_call'
func(&id, ##__VA_ARGS__); \
^~~~~~~~~~~
include/linux/dynamic_debug.h:157:2: note: in expansion of macro '_dynamic_func_call'
_dynamic_func_call(fmt,__dynamic_dev_dbg, \
^~~~~~~~~~~~~~~~~~
include/linux/device.h:1751:2: note: in expansion of macro 'dynamic_dev_dbg'
dynamic_dev_dbg(dev, dev_fmt(fmt), ##__VA_ARGS__)
^~~~~~~~~~~~~~~
include/linux/device.h:1751:23: note: in expansion of macro 'dev_fmt'
dynamic_dev_dbg(dev, dev_fmt(fmt), ##__VA_ARGS__)
^~~~~~~
>> drivers/crypto/allwinner/sun4i-ss/sun4i-ss-cipher.c:277:3: note: in expansion of macro 'dev_dbg'
dev_dbg(ss->dev, "%x %u/%u %u/%u cnt=%u %u/%u %u/%u cnt=%u %u\n",
^~~~~~~
In file included from include/linux/clk.h:13:0,
from drivers/crypto/allwinner/sun4i-ss/sun4i-ss.h:14,
from drivers/crypto/allwinner/sun4i-ss/sun4i-ss-cipher.c:13:
include/linux/kernel.h:842:29: warning: comparison of distinct pointer types lacks a cast
(!!(sizeof((typeof(x) *)1 == (typeof(y) *)1)))
^
include/linux/kernel.h:856:4: note: in expansion of macro '__typecheck'
(__typecheck(x, y) && __no_side_effects(x, y))
^~~~~~~~~~~
include/linux/kernel.h:866:24: note: in expansion of macro '__safe_cmp'
__builtin_choose_expr(__safe_cmp(x, y), \
^~~~~~~~~~
include/linux/kernel.h:875:19: note: in expansion of macro '__careful_cmp'
#define min(x, y) __careful_cmp(x, y, <)
^~~~~~~~~~~~~
>> include/linux/kernel.h:890:23: note: in expansion of macro 'min'
#define min3(x, y, z) min((typeof(x))min(x, y), z)
^~~
drivers/crypto/allwinner/sun4i-ss/sun4i-ss-cipher.c:285:10: note: in expansion of macro 'min3'
todo = min3(tx_cnt, oleft / 4, (mo.length - oo) / 4);
^~~~
include/linux/kernel.h:842:29: warning: comparison of distinct pointer types lacks a cast
(!!(sizeof((typeof(x) *)1 == (typeof(y) *)1)))
^
include/linux/kernel.h:856:4: note: in expansion of macro '__typecheck'
(__typecheck(x, y) && __no_side_effects(x, y))
^~~~~~~~~~~
include/linux/kernel.h:866:24: note: in expansion of macro '__safe_cmp'
__builtin_choose_expr(__safe_cmp(x, y), \
^~~~~~~~~~
include/linux/kernel.h:875:19: note: in expansion of macro '__careful_cmp'
#define min(x, y) __careful_cmp(x, y, <)
^~~~~~~~~~~~~
>> drivers/crypto/allwinner/sun4i-ss/sun4i-ss-cipher.c:311:12: note: in expansion of macro 'min'
todo = min(mo.length - oo, obl - obo);
^~~
--
In file included from include/linux/clk.h:13:0,
from drivers/crypto//allwinner/sun4i-ss/sun4i-ss.h:14,
from drivers/crypto//allwinner/sun4i-ss/sun4i-ss-cipher.c:13:
drivers/crypto//allwinner/sun4i-ss/sun4i-ss-cipher.c: In function 'sun4i_ss_opti_poll':
include/linux/kernel.h:842:29: warning: comparison of distinct pointer types lacks a cast
(!!(sizeof((typeof(x) *)1 == (typeof(y) *)1)))
^
include/linux/kernel.h:856:4: note: in expansion of macro '__typecheck'
(__typecheck(x, y) && __no_side_effects(x, y))
^~~~~~~~~~~
include/linux/kernel.h:866:24: note: in expansion of macro '__safe_cmp'
__builtin_choose_expr(__safe_cmp(x, y), \
^~~~~~~~~~
include/linux/kernel.h:875:19: note: in expansion of macro '__careful_cmp'
#define min(x, y) __careful_cmp(x, y, <)
^~~~~~~~~~~~~
>> include/linux/kernel.h:890:23: note: in expansion of macro 'min'
#define min3(x, y, z) min((typeof(x))min(x, y), z)
^~~
drivers/crypto//allwinner/sun4i-ss/sun4i-ss-cipher.c:75:10: note: in expansion of macro 'min3'
todo = min3(rx_cnt, ileft, (mi.length - oi) / 4);
^~~~
include/linux/kernel.h:842:29: warning: comparison of distinct pointer types lacks a cast
(!!(sizeof((typeof(x) *)1 == (typeof(y) *)1)))
^
include/linux/kernel.h:856:4: note: in expansion of macro '__typecheck'
(__typecheck(x, y) && __no_side_effects(x, y))
^~~~~~~~~~~
include/linux/kernel.h:866:24: note: in expansion of macro '__safe_cmp'
__builtin_choose_expr(__safe_cmp(x, y), \
^~~~~~~~~~
include/linux/kernel.h:875:19: note: in expansion of macro '__careful_cmp'
#define min(x, y) __careful_cmp(x, y, <)
^~~~~~~~~~~~~
>> include/linux/kernel.h:890:23: note: in expansion of macro 'min'
#define min3(x, y, z) min((typeof(x))min(x, y), z)
^~~
drivers/crypto//allwinner/sun4i-ss/sun4i-ss-cipher.c:90:10: note: in expansion of macro 'min3'
todo = min3(tx_cnt, oleft, (mo.length - oo) / 4);
^~~~
drivers/crypto//allwinner/sun4i-ss/sun4i-ss-cipher.c: In function 'sun4i_ss_cipher_poll':
include/linux/kernel.h:842:29: warning: comparison of distinct pointer types lacks a cast
(!!(sizeof((typeof(x) *)1 == (typeof(y) *)1)))
^
include/linux/kernel.h:856:4: note: in expansion of macro '__typecheck'
(__typecheck(x, y) && __no_side_effects(x, y))
^~~~~~~~~~~
include/linux/kernel.h:866:24: note: in expansion of macro '__safe_cmp'
__builtin_choose_expr(__safe_cmp(x, y), \
^~~~~~~~~~
include/linux/kernel.h:875:19: note: in expansion of macro '__careful_cmp'
#define min(x, y) __careful_cmp(x, y, <)
^~~~~~~~~~~~~
>> include/linux/kernel.h:890:23: note: in expansion of macro 'min'
#define min3(x, y, z) min((typeof(x))min(x, y), z)
^~~
drivers/crypto//allwinner/sun4i-ss/sun4i-ss-cipher.c:242:11: note: in expansion of macro 'min3'
todo = min3(rx_cnt, ileft / 4, (mi.length - oi) / 4);
^~~~
include/linux/kernel.h:842:29: warning: comparison of distinct pointer types lacks a cast
(!!(sizeof((typeof(x) *)1 == (typeof(y) *)1)))
^
include/linux/kernel.h:856:4: note: in expansion of macro '__typecheck'
(__typecheck(x, y) && __no_side_effects(x, y))
^~~~~~~~~~~
include/linux/kernel.h:866:24: note: in expansion of macro '__safe_cmp'
__builtin_choose_expr(__safe_cmp(x, y), \
^~~~~~~~~~
include/linux/kernel.h:875:19: note: in expansion of macro '__careful_cmp'
#define min(x, y) __careful_cmp(x, y, <)
^~~~~~~~~~~~~
>> include/linux/kernel.h:890:23: note: in expansion of macro 'min'
#define min3(x, y, z) min((typeof(x))min(x, y), z)
^~~
drivers/crypto//allwinner/sun4i-ss/sun4i-ss-cipher.c:256:12: note: in expansion of macro 'min3'
todo = min3(rx_cnt * 4 - ob, ileft,
^~~~
In file included from include/linux/printk.h:332:0,
from include/linux/kernel.h:15,
from include/linux/clk.h:13,
from drivers/crypto//allwinner/sun4i-ss/sun4i-ss.h:14,
from drivers/crypto//allwinner/sun4i-ss/sun4i-ss-cipher.c:13:
drivers/crypto//allwinner/sun4i-ss/sun4i-ss-cipher.c:277:20: warning: format '%u' expects argument of type 'unsigned int', but argument 6 has type 'size_t {aka long unsigned int}' [-Wformat=]
dev_dbg(ss->dev, "%x %u/%u %u/%u cnt=%u %u/%u %u/%u cnt=%u %u\n",
^
include/linux/dynamic_debug.h:125:15: note: in definition of macro '__dynamic_func_call'
func(&id, ##__VA_ARGS__); \
^~~~~~~~~~~
include/linux/dynamic_debug.h:157:2: note: in expansion of macro '_dynamic_func_call'
_dynamic_func_call(fmt,__dynamic_dev_dbg, \
^~~~~~~~~~~~~~~~~~
include/linux/device.h:1751:2: note: in expansion of macro 'dynamic_dev_dbg'
dynamic_dev_dbg(dev, dev_fmt(fmt), ##__VA_ARGS__)
^~~~~~~~~~~~~~~
include/linux/device.h:1751:23: note: in expansion of macro 'dev_fmt'
dynamic_dev_dbg(dev, dev_fmt(fmt), ##__VA_ARGS__)
^~~~~~~
drivers/crypto//allwinner/sun4i-ss/sun4i-ss-cipher.c:277:3: note: in expansion of macro 'dev_dbg'
dev_dbg(ss->dev, "%x %u/%u %u/%u cnt=%u %u/%u %u/%u cnt=%u %u\n",
^~~~~~~
drivers/crypto//allwinner/sun4i-ss/sun4i-ss-cipher.c:277:20: warning: format '%u' expects argument of type 'unsigned int', but argument 11 has type 'size_t {aka long unsigned int}' [-Wformat=]
dev_dbg(ss->dev, "%x %u/%u %u/%u cnt=%u %u/%u %u/%u cnt=%u %u\n",
^
include/linux/dynamic_debug.h:125:15: note: in definition of macro '__dynamic_func_call'
func(&id, ##__VA_ARGS__); \
^~~~~~~~~~~
include/linux/dynamic_debug.h:157:2: note: in expansion of macro '_dynamic_func_call'
_dynamic_func_call(fmt,__dynamic_dev_dbg, \
^~~~~~~~~~~~~~~~~~
include/linux/device.h:1751:2: note: in expansion of macro 'dynamic_dev_dbg'
dynamic_dev_dbg(dev, dev_fmt(fmt), ##__VA_ARGS__)
^~~~~~~~~~~~~~~
include/linux/device.h:1751:23: note: in expansion of macro 'dev_fmt'
dynamic_dev_dbg(dev, dev_fmt(fmt), ##__VA_ARGS__)
^~~~~~~
drivers/crypto//allwinner/sun4i-ss/sun4i-ss-cipher.c:277:3: note: in expansion of macro 'dev_dbg'
dev_dbg(ss->dev, "%x %u/%u %u/%u cnt=%u %u/%u %u/%u cnt=%u %u\n",
^~~~~~~
In file included from include/linux/clk.h:13:0,
from drivers/crypto//allwinner/sun4i-ss/sun4i-ss.h:14,
from drivers/crypto//allwinner/sun4i-ss/sun4i-ss-cipher.c:13:
include/linux/kernel.h:842:29: warning: comparison of distinct pointer types lacks a cast
(!!(sizeof((typeof(x) *)1 == (typeof(y) *)1)))
^
include/linux/kernel.h:856:4: note: in expansion of macro '__typecheck'
(__typecheck(x, y) && __no_side_effects(x, y))
^~~~~~~~~~~
include/linux/kernel.h:866:24: note: in expansion of macro '__safe_cmp'
__builtin_choose_expr(__safe_cmp(x, y), \
^~~~~~~~~~
include/linux/kernel.h:875:19: note: in expansion of macro '__careful_cmp'
#define min(x, y) __careful_cmp(x, y, <)
^~~~~~~~~~~~~
>> include/linux/kernel.h:890:23: note: in expansion of macro 'min'
#define min3(x, y, z) min((typeof(x))min(x, y), z)
^~~
drivers/crypto//allwinner/sun4i-ss/sun4i-ss-cipher.c:285:10: note: in expansion of macro 'min3'
todo = min3(tx_cnt, oleft / 4, (mo.length - oo) / 4);
^~~~
include/linux/kernel.h:842:29: warning: comparison of distinct pointer types lacks a cast
(!!(sizeof((typeof(x) *)1 == (typeof(y) *)1)))
^
include/linux/kernel.h:856:4: note: in expansion of macro '__typecheck'
(__typecheck(x, y) && __no_side_effects(x, y))
^~~~~~~~~~~
include/linux/kernel.h:866:24: note: in expansion of macro '__safe_cmp'
__builtin_choose_expr(__safe_cmp(x, y), \
^~~~~~~~~~
include/linux/kernel.h:875:19: note: in expansion of macro '__careful_cmp'
#define min(x, y) __careful_cmp(x, y, <)
^~~~~~~~~~~~~
drivers/crypto//allwinner/sun4i-ss/sun4i-ss-cipher.c:311:12: note: in expansion of macro 'min'
todo = min(mo.length - oo, obl - obo);
^~~
vim +/min +890 include/linux/kernel.h
526211bc58c4b3 Ingo Molnar 2009-03-05 828
^1da177e4c3f41 Linus Torvalds 2005-04-16 829 /*
3c8ba0d61d04ce Kees Cook 2018-03-30 830 * min()/max()/clamp() macros must accomplish three things:
3c8ba0d61d04ce Kees Cook 2018-03-30 831 *
3c8ba0d61d04ce Kees Cook 2018-03-30 832 * - avoid multiple evaluations of the arguments (so side-effects like
3c8ba0d61d04ce Kees Cook 2018-03-30 833 * "x++" happen only once) when non-constant.
3c8ba0d61d04ce Kees Cook 2018-03-30 834 * - perform strict type-checking (to generate warnings instead of
3c8ba0d61d04ce Kees Cook 2018-03-30 835 * nasty runtime surprises). See the "unnecessary" pointer comparison
3c8ba0d61d04ce Kees Cook 2018-03-30 836 * in __typecheck().
3c8ba0d61d04ce Kees Cook 2018-03-30 837 * - retain result as a constant expressions when called with only
3c8ba0d61d04ce Kees Cook 2018-03-30 838 * constant expressions (to avoid tripping VLA warnings in stack
3c8ba0d61d04ce Kees Cook 2018-03-30 839 * allocation usage).
3c8ba0d61d04ce Kees Cook 2018-03-30 840 */
3c8ba0d61d04ce Kees Cook 2018-03-30 841 #define __typecheck(x, y) \
3c8ba0d61d04ce Kees Cook 2018-03-30 842 (!!(sizeof((typeof(x) *)1 == (typeof(y) *)1)))
3c8ba0d61d04ce Kees Cook 2018-03-30 843
3c8ba0d61d04ce Kees Cook 2018-03-30 844 /*
3c8ba0d61d04ce Kees Cook 2018-03-30 845 * This returns a constant expression while determining if an argument is
3c8ba0d61d04ce Kees Cook 2018-03-30 846 * a constant expression, most importantly without evaluating the argument.
3c8ba0d61d04ce Kees Cook 2018-03-30 847 * Glory to Martin Uecker <Martin.Uecker@....uni-goettingen.de>
^1da177e4c3f41 Linus Torvalds 2005-04-16 848 */
3c8ba0d61d04ce Kees Cook 2018-03-30 849 #define __is_constexpr(x) \
3c8ba0d61d04ce Kees Cook 2018-03-30 850 (sizeof(int) == sizeof(*(8 ? ((void *)((long)(x) * 0l)) : (int *)8)))
3c8ba0d61d04ce Kees Cook 2018-03-30 851
3c8ba0d61d04ce Kees Cook 2018-03-30 852 #define __no_side_effects(x, y) \
3c8ba0d61d04ce Kees Cook 2018-03-30 853 (__is_constexpr(x) && __is_constexpr(y))
3c8ba0d61d04ce Kees Cook 2018-03-30 854
3c8ba0d61d04ce Kees Cook 2018-03-30 855 #define __safe_cmp(x, y) \
3c8ba0d61d04ce Kees Cook 2018-03-30 @856 (__typecheck(x, y) && __no_side_effects(x, y))
3c8ba0d61d04ce Kees Cook 2018-03-30 857
3c8ba0d61d04ce Kees Cook 2018-03-30 858 #define __cmp(x, y, op) ((x) op (y) ? (x) : (y))
3c8ba0d61d04ce Kees Cook 2018-03-30 859
e9092d0d979611 Linus Torvalds 2018-04-09 860 #define __cmp_once(x, y, unique_x, unique_y, op) ({ \
e9092d0d979611 Linus Torvalds 2018-04-09 861 typeof(x) unique_x = (x); \
e9092d0d979611 Linus Torvalds 2018-04-09 862 typeof(y) unique_y = (y); \
e9092d0d979611 Linus Torvalds 2018-04-09 863 __cmp(unique_x, unique_y, op); })
3c8ba0d61d04ce Kees Cook 2018-03-30 864
3c8ba0d61d04ce Kees Cook 2018-03-30 865 #define __careful_cmp(x, y, op) \
3c8ba0d61d04ce Kees Cook 2018-03-30 866 __builtin_choose_expr(__safe_cmp(x, y), \
e9092d0d979611 Linus Torvalds 2018-04-09 867 __cmp(x, y, op), \
e9092d0d979611 Linus Torvalds 2018-04-09 868 __cmp_once(x, y, __UNIQUE_ID(__x), __UNIQUE_ID(__y), op))
e8c97af0c1f23d Randy Dunlap 2017-10-13 869
e8c97af0c1f23d Randy Dunlap 2017-10-13 870 /**
e8c97af0c1f23d Randy Dunlap 2017-10-13 871 * min - return minimum of two values of the same or compatible types
e8c97af0c1f23d Randy Dunlap 2017-10-13 872 * @x: first value
e8c97af0c1f23d Randy Dunlap 2017-10-13 873 * @y: second value
e8c97af0c1f23d Randy Dunlap 2017-10-13 874 */
3c8ba0d61d04ce Kees Cook 2018-03-30 875 #define min(x, y) __careful_cmp(x, y, <)
e8c97af0c1f23d Randy Dunlap 2017-10-13 876
e8c97af0c1f23d Randy Dunlap 2017-10-13 877 /**
e8c97af0c1f23d Randy Dunlap 2017-10-13 878 * max - return maximum of two values of the same or compatible types
e8c97af0c1f23d Randy Dunlap 2017-10-13 879 * @x: first value
e8c97af0c1f23d Randy Dunlap 2017-10-13 880 * @y: second value
e8c97af0c1f23d Randy Dunlap 2017-10-13 881 */
3c8ba0d61d04ce Kees Cook 2018-03-30 882 #define max(x, y) __careful_cmp(x, y, >)
bdf4bbaaee3d4b Harvey Harrison 2008-04-30 883
e8c97af0c1f23d Randy Dunlap 2017-10-13 884 /**
e8c97af0c1f23d Randy Dunlap 2017-10-13 885 * min3 - return minimum of three values
e8c97af0c1f23d Randy Dunlap 2017-10-13 886 * @x: first value
e8c97af0c1f23d Randy Dunlap 2017-10-13 887 * @y: second value
e8c97af0c1f23d Randy Dunlap 2017-10-13 888 * @z: third value
e8c97af0c1f23d Randy Dunlap 2017-10-13 889 */
2e1d06e1c05af9 Michal Nazarewicz 2014-10-09 @890 #define min3(x, y, z) min((typeof(x))min(x, y), z)
e8c97af0c1f23d Randy Dunlap 2017-10-13 891
:::::: The code at line 890 was first introduced by commit
:::::: 2e1d06e1c05af9dbe8a3bfddeefbf041ca637fff include/linux/kernel.h: rewrite min3, max3 and clamp using min and max
:::::: TO: Michal Nazarewicz <mina86@...a86.com>
:::::: CC: Linus Torvalds <torvalds@...ux-foundation.org>
---
0-DAY kernel test infrastructure Open Source Technology Center
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org Intel Corporation
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