From: kernel test robot <lkp@intel.com>
To: kbuild-all@lists.01.org
Subject: include/asm-generic/cmpxchg.h:37:39: sparse: sparse: cast truncates bits from constant value (deadbeef becomes ef)
Date: Sat, 01 Jan 2022 19:04:43 +0800 [thread overview]
Message-ID: <202201011813.hKjzPzZI-lkp@intel.com> (raw)
[-- Attachment #1: Type: text/plain, Size: 7761 bytes --]
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 8008293888188c3923f5bd8a69370dae25ed14e5
commit: c7178cdecdbef8321f418fac55f3afaca3bb4c96 locking/atomic: h8300: use asm-generic exclusively
date: 7 months ago
config: h8300-randconfig-s031-20211117 (https://download.01.org/0day-ci/archive/20220101/202201011813.hKjzPzZI-lkp(a)intel.com/config)
compiler: h8300-linux-gcc (GCC) 11.2.0
reproduce:
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# apt-get install sparse
# sparse version: v0.6.4-dirty
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c7178cdecdbef8321f418fac55f3afaca3bb4c96
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout c7178cdecdbef8321f418fac55f3afaca3bb4c96
# save the config file to linux build tree
mkdir build_dir
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=h8300 SHELL=/bin/bash
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>
sparse warnings: (new ones prefixed by >>)
lib/atomic64_test.c: note: in included file (through arch/h8300/include/generated/asm/cmpxchg.h, include/asm-generic/atomic.h, arch/h8300/include/generated/asm/atomic.h, ...):
>> include/asm-generic/cmpxchg.h:37:39: sparse: sparse: cast truncates bits from constant value (deadbeef becomes ef)
>> include/asm-generic/cmpxchg.h:48:40: sparse: sparse: cast truncates bits from constant value (deadbeef becomes beef)
>> include/asm-generic/cmpxchg.h:37:39: sparse: sparse: cast truncates bits from constant value (deadbeef becomes ef)
>> include/asm-generic/cmpxchg.h:48:40: sparse: sparse: cast truncates bits from constant value (deadbeef becomes beef)
>> include/asm-generic/cmpxchg.h:37:39: sparse: sparse: cast truncates bits from constant value (deadbeef becomes ef)
>> include/asm-generic/cmpxchg.h:48:40: sparse: sparse: cast truncates bits from constant value (deadbeef becomes beef)
>> include/asm-generic/cmpxchg.h:37:39: sparse: sparse: cast truncates bits from constant value (deadbeef becomes ef)
>> include/asm-generic/cmpxchg.h:48:40: sparse: sparse: cast truncates bits from constant value (deadbeef becomes beef)
lib/atomic64_test.c: note: in included file (through include/asm-generic/cmpxchg.h, arch/h8300/include/generated/asm/cmpxchg.h, include/asm-generic/atomic.h, ...):
>> include/asm-generic/cmpxchg-local.h:30:42: sparse: sparse: cast truncates bits from constant value (deadbeef becomes ef)
>> include/asm-generic/cmpxchg-local.h:34:44: sparse: sparse: cast truncates bits from constant value (deadbeef becomes beef)
>> include/asm-generic/cmpxchg-local.h:30:42: sparse: sparse: cast truncates bits from constant value (deadbeef becomes ef)
>> include/asm-generic/cmpxchg-local.h:34:44: sparse: sparse: cast truncates bits from constant value (deadbeef becomes beef)
>> include/asm-generic/cmpxchg-local.h:30:42: sparse: sparse: cast truncates bits from constant value (deadbeef becomes ef)
>> include/asm-generic/cmpxchg-local.h:34:44: sparse: sparse: cast truncates bits from constant value (deadbeef becomes beef)
>> include/asm-generic/cmpxchg-local.h:30:42: sparse: sparse: cast truncates bits from constant value (deadbeef becomes ef)
>> include/asm-generic/cmpxchg-local.h:34:44: sparse: sparse: cast truncates bits from constant value (deadbeef becomes beef)
>> include/asm-generic/cmpxchg-local.h:30:42: sparse: sparse: cast truncates bits from constant value (deadbeef becomes ef)
>> include/asm-generic/cmpxchg-local.h:34:44: sparse: sparse: cast truncates bits from constant value (deadbeef becomes beef)
>> include/asm-generic/cmpxchg-local.h:30:42: sparse: sparse: cast truncates bits from constant value (deadbeef becomes ef)
>> include/asm-generic/cmpxchg-local.h:34:44: sparse: sparse: cast truncates bits from constant value (deadbeef becomes beef)
>> include/asm-generic/cmpxchg-local.h:30:42: sparse: sparse: cast truncates bits from constant value (deadbeef becomes ef)
>> include/asm-generic/cmpxchg-local.h:34:44: sparse: sparse: cast truncates bits from constant value (deadbeef becomes beef)
>> include/asm-generic/cmpxchg-local.h:30:42: sparse: sparse: cast truncates bits from constant value (deadbeef becomes ef)
>> include/asm-generic/cmpxchg-local.h:34:44: sparse: sparse: cast truncates bits from constant value (deadbeef becomes beef)
vim +37 include/asm-generic/cmpxchg.h
b4816afa398670 David Howells 2012-03-28 24
b4816afa398670 David Howells 2012-03-28 25 static inline
b4816afa398670 David Howells 2012-03-28 26 unsigned long __xchg(unsigned long x, volatile void *ptr, int size)
b4816afa398670 David Howells 2012-03-28 27 {
b4816afa398670 David Howells 2012-03-28 28 unsigned long ret, flags;
b4816afa398670 David Howells 2012-03-28 29
b4816afa398670 David Howells 2012-03-28 30 switch (size) {
b4816afa398670 David Howells 2012-03-28 31 case 1:
b4816afa398670 David Howells 2012-03-28 32 #ifdef __xchg_u8
b4816afa398670 David Howells 2012-03-28 33 return __xchg_u8(x, ptr);
b4816afa398670 David Howells 2012-03-28 34 #else
b4816afa398670 David Howells 2012-03-28 35 local_irq_save(flags);
b4816afa398670 David Howells 2012-03-28 36 ret = *(volatile u8 *)ptr;
b4816afa398670 David Howells 2012-03-28 @37 *(volatile u8 *)ptr = x;
b4816afa398670 David Howells 2012-03-28 38 local_irq_restore(flags);
b4816afa398670 David Howells 2012-03-28 39 return ret;
b4816afa398670 David Howells 2012-03-28 40 #endif /* __xchg_u8 */
b4816afa398670 David Howells 2012-03-28 41
b4816afa398670 David Howells 2012-03-28 42 case 2:
b4816afa398670 David Howells 2012-03-28 43 #ifdef __xchg_u16
b4816afa398670 David Howells 2012-03-28 44 return __xchg_u16(x, ptr);
b4816afa398670 David Howells 2012-03-28 45 #else
b4816afa398670 David Howells 2012-03-28 46 local_irq_save(flags);
b4816afa398670 David Howells 2012-03-28 47 ret = *(volatile u16 *)ptr;
b4816afa398670 David Howells 2012-03-28 @48 *(volatile u16 *)ptr = x;
b4816afa398670 David Howells 2012-03-28 49 local_irq_restore(flags);
b4816afa398670 David Howells 2012-03-28 50 return ret;
b4816afa398670 David Howells 2012-03-28 51 #endif /* __xchg_u16 */
b4816afa398670 David Howells 2012-03-28 52
b4816afa398670 David Howells 2012-03-28 53 case 4:
b4816afa398670 David Howells 2012-03-28 54 #ifdef __xchg_u32
b4816afa398670 David Howells 2012-03-28 55 return __xchg_u32(x, ptr);
b4816afa398670 David Howells 2012-03-28 56 #else
b4816afa398670 David Howells 2012-03-28 57 local_irq_save(flags);
b4816afa398670 David Howells 2012-03-28 58 ret = *(volatile u32 *)ptr;
b4816afa398670 David Howells 2012-03-28 59 *(volatile u32 *)ptr = x;
b4816afa398670 David Howells 2012-03-28 60 local_irq_restore(flags);
b4816afa398670 David Howells 2012-03-28 61 return ret;
b4816afa398670 David Howells 2012-03-28 62 #endif /* __xchg_u32 */
b4816afa398670 David Howells 2012-03-28 63
:::::: The code at line 37 was first introduced by commit
:::::: b4816afa3986704d1404fc48e931da5135820472 Move the asm-generic/system.h xchg() implementation to asm-generic/cmpxchg.h
:::::: TO: David Howells <dhowells@redhat.com>
:::::: CC: David Howells <dhowells@redhat.com>
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org
WARNING: multiple messages have this Message-ID (diff)
From: kernel test robot <lkp@intel.com>
To: Mark Rutland <mark.rutland@arm.com>
Cc: kbuild-all@lists.01.org, linux-kernel@vger.kernel.org,
Peter Zijlstra <peterz@infradead.org>
Subject: include/asm-generic/cmpxchg.h:37:39: sparse: sparse: cast truncates bits from constant value (deadbeef becomes ef)
Date: Sat, 1 Jan 2022 19:04:43 +0800 [thread overview]
Message-ID: <202201011813.hKjzPzZI-lkp@intel.com> (raw)
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: 8008293888188c3923f5bd8a69370dae25ed14e5
commit: c7178cdecdbef8321f418fac55f3afaca3bb4c96 locking/atomic: h8300: use asm-generic exclusively
date: 7 months ago
config: h8300-randconfig-s031-20211117 (https://download.01.org/0day-ci/archive/20220101/202201011813.hKjzPzZI-lkp@intel.com/config)
compiler: h8300-linux-gcc (GCC) 11.2.0
reproduce:
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# apt-get install sparse
# sparse version: v0.6.4-dirty
# https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c7178cdecdbef8321f418fac55f3afaca3bb4c96
git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
git fetch --no-tags linus master
git checkout c7178cdecdbef8321f418fac55f3afaca3bb4c96
# save the config file to linux build tree
mkdir build_dir
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=h8300 SHELL=/bin/bash
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>
sparse warnings: (new ones prefixed by >>)
lib/atomic64_test.c: note: in included file (through arch/h8300/include/generated/asm/cmpxchg.h, include/asm-generic/atomic.h, arch/h8300/include/generated/asm/atomic.h, ...):
>> include/asm-generic/cmpxchg.h:37:39: sparse: sparse: cast truncates bits from constant value (deadbeef becomes ef)
>> include/asm-generic/cmpxchg.h:48:40: sparse: sparse: cast truncates bits from constant value (deadbeef becomes beef)
>> include/asm-generic/cmpxchg.h:37:39: sparse: sparse: cast truncates bits from constant value (deadbeef becomes ef)
>> include/asm-generic/cmpxchg.h:48:40: sparse: sparse: cast truncates bits from constant value (deadbeef becomes beef)
>> include/asm-generic/cmpxchg.h:37:39: sparse: sparse: cast truncates bits from constant value (deadbeef becomes ef)
>> include/asm-generic/cmpxchg.h:48:40: sparse: sparse: cast truncates bits from constant value (deadbeef becomes beef)
>> include/asm-generic/cmpxchg.h:37:39: sparse: sparse: cast truncates bits from constant value (deadbeef becomes ef)
>> include/asm-generic/cmpxchg.h:48:40: sparse: sparse: cast truncates bits from constant value (deadbeef becomes beef)
lib/atomic64_test.c: note: in included file (through include/asm-generic/cmpxchg.h, arch/h8300/include/generated/asm/cmpxchg.h, include/asm-generic/atomic.h, ...):
>> include/asm-generic/cmpxchg-local.h:30:42: sparse: sparse: cast truncates bits from constant value (deadbeef becomes ef)
>> include/asm-generic/cmpxchg-local.h:34:44: sparse: sparse: cast truncates bits from constant value (deadbeef becomes beef)
>> include/asm-generic/cmpxchg-local.h:30:42: sparse: sparse: cast truncates bits from constant value (deadbeef becomes ef)
>> include/asm-generic/cmpxchg-local.h:34:44: sparse: sparse: cast truncates bits from constant value (deadbeef becomes beef)
>> include/asm-generic/cmpxchg-local.h:30:42: sparse: sparse: cast truncates bits from constant value (deadbeef becomes ef)
>> include/asm-generic/cmpxchg-local.h:34:44: sparse: sparse: cast truncates bits from constant value (deadbeef becomes beef)
>> include/asm-generic/cmpxchg-local.h:30:42: sparse: sparse: cast truncates bits from constant value (deadbeef becomes ef)
>> include/asm-generic/cmpxchg-local.h:34:44: sparse: sparse: cast truncates bits from constant value (deadbeef becomes beef)
>> include/asm-generic/cmpxchg-local.h:30:42: sparse: sparse: cast truncates bits from constant value (deadbeef becomes ef)
>> include/asm-generic/cmpxchg-local.h:34:44: sparse: sparse: cast truncates bits from constant value (deadbeef becomes beef)
>> include/asm-generic/cmpxchg-local.h:30:42: sparse: sparse: cast truncates bits from constant value (deadbeef becomes ef)
>> include/asm-generic/cmpxchg-local.h:34:44: sparse: sparse: cast truncates bits from constant value (deadbeef becomes beef)
>> include/asm-generic/cmpxchg-local.h:30:42: sparse: sparse: cast truncates bits from constant value (deadbeef becomes ef)
>> include/asm-generic/cmpxchg-local.h:34:44: sparse: sparse: cast truncates bits from constant value (deadbeef becomes beef)
>> include/asm-generic/cmpxchg-local.h:30:42: sparse: sparse: cast truncates bits from constant value (deadbeef becomes ef)
>> include/asm-generic/cmpxchg-local.h:34:44: sparse: sparse: cast truncates bits from constant value (deadbeef becomes beef)
vim +37 include/asm-generic/cmpxchg.h
b4816afa398670 David Howells 2012-03-28 24
b4816afa398670 David Howells 2012-03-28 25 static inline
b4816afa398670 David Howells 2012-03-28 26 unsigned long __xchg(unsigned long x, volatile void *ptr, int size)
b4816afa398670 David Howells 2012-03-28 27 {
b4816afa398670 David Howells 2012-03-28 28 unsigned long ret, flags;
b4816afa398670 David Howells 2012-03-28 29
b4816afa398670 David Howells 2012-03-28 30 switch (size) {
b4816afa398670 David Howells 2012-03-28 31 case 1:
b4816afa398670 David Howells 2012-03-28 32 #ifdef __xchg_u8
b4816afa398670 David Howells 2012-03-28 33 return __xchg_u8(x, ptr);
b4816afa398670 David Howells 2012-03-28 34 #else
b4816afa398670 David Howells 2012-03-28 35 local_irq_save(flags);
b4816afa398670 David Howells 2012-03-28 36 ret = *(volatile u8 *)ptr;
b4816afa398670 David Howells 2012-03-28 @37 *(volatile u8 *)ptr = x;
b4816afa398670 David Howells 2012-03-28 38 local_irq_restore(flags);
b4816afa398670 David Howells 2012-03-28 39 return ret;
b4816afa398670 David Howells 2012-03-28 40 #endif /* __xchg_u8 */
b4816afa398670 David Howells 2012-03-28 41
b4816afa398670 David Howells 2012-03-28 42 case 2:
b4816afa398670 David Howells 2012-03-28 43 #ifdef __xchg_u16
b4816afa398670 David Howells 2012-03-28 44 return __xchg_u16(x, ptr);
b4816afa398670 David Howells 2012-03-28 45 #else
b4816afa398670 David Howells 2012-03-28 46 local_irq_save(flags);
b4816afa398670 David Howells 2012-03-28 47 ret = *(volatile u16 *)ptr;
b4816afa398670 David Howells 2012-03-28 @48 *(volatile u16 *)ptr = x;
b4816afa398670 David Howells 2012-03-28 49 local_irq_restore(flags);
b4816afa398670 David Howells 2012-03-28 50 return ret;
b4816afa398670 David Howells 2012-03-28 51 #endif /* __xchg_u16 */
b4816afa398670 David Howells 2012-03-28 52
b4816afa398670 David Howells 2012-03-28 53 case 4:
b4816afa398670 David Howells 2012-03-28 54 #ifdef __xchg_u32
b4816afa398670 David Howells 2012-03-28 55 return __xchg_u32(x, ptr);
b4816afa398670 David Howells 2012-03-28 56 #else
b4816afa398670 David Howells 2012-03-28 57 local_irq_save(flags);
b4816afa398670 David Howells 2012-03-28 58 ret = *(volatile u32 *)ptr;
b4816afa398670 David Howells 2012-03-28 59 *(volatile u32 *)ptr = x;
b4816afa398670 David Howells 2012-03-28 60 local_irq_restore(flags);
b4816afa398670 David Howells 2012-03-28 61 return ret;
b4816afa398670 David Howells 2012-03-28 62 #endif /* __xchg_u32 */
b4816afa398670 David Howells 2012-03-28 63
:::::: The code at line 37 was first introduced by commit
:::::: b4816afa3986704d1404fc48e931da5135820472 Move the asm-generic/system.h xchg() implementation to asm-generic/cmpxchg.h
:::::: TO: David Howells <dhowells@redhat.com>
:::::: CC: David Howells <dhowells@redhat.com>
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
next reply other threads:[~2022-01-01 11:04 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-01 11:04 kernel test robot [this message]
2022-01-01 11:04 ` include/asm-generic/cmpxchg.h:37:39: sparse: sparse: cast truncates bits from constant value (deadbeef becomes ef) kernel test robot
-- strict thread matches above, loose matches on Subject: below --
2021-11-23 22:19 kernel test robot
2021-11-23 22:19 ` kernel test robot
2021-11-26 11:03 ` Mark Rutland
2021-11-26 11:03 ` Mark Rutland
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=202201011813.hKjzPzZI-lkp@intel.com \
--to=lkp@intel.com \
--cc=kbuild-all@lists.01.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.