* [akpm-mm:mm-unstable 269/293] mm/mm_init.c:1386:33: warning: right shift count is negative
@ 2023-03-23 11:01 kernel test robot
2023-03-23 12:27 ` Mike Rapoport
0 siblings, 1 reply; 2+ messages in thread
From: kernel test robot @ 2023-03-23 11:01 UTC (permalink / raw)
To: Mike Rapoport (IBM)
Cc: oe-kbuild-all, Andrew Morton, Linux Memory Management List
Hi Mike,
FYI, the error/warning was bisected to this commit, please ignore it if it's irrelevant.
tree: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-unstable
head: 51551d71edbc998fd8c8afa7312db3d270f5998e
commit: a37d26b620530076879100bb6e3953458bf069fe [269/293] mm: move most of core MM initialization to mm/mm_init.c
config: loongarch-allnoconfig (https://download.01.org/0day-ci/archive/20230323/202303231850.ZgGa5u2h-lkp@intel.com/config)
compiler: loongarch64-linux-gcc (GCC) 12.1.0
reproduce (this is a W=1 build):
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
# https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git/commit/?id=a37d26b620530076879100bb6e3953458bf069fe
git remote add akpm-mm https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git
git fetch --no-tags akpm-mm mm-unstable
git checkout a37d26b620530076879100bb6e3953458bf069fe
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=loongarch olddefconfig
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=loongarch SHELL=/bin/bash
If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>
| Link: https://lore.kernel.org/oe-kbuild-all/202303231850.ZgGa5u2h-lkp@intel.com/
All warnings (new ones prefixed by >>):
58 | #define pageblock_start_pfn(pfn) ALIGN_DOWN((pfn), pageblock_nr_pages)
| ^~~~~~~~~~
include/linux/pageblock-flags.h:58:59: note: in expansion of macro 'pageblock_nr_pages'
58 | #define pageblock_start_pfn(pfn) ALIGN_DOWN((pfn), pageblock_nr_pages)
| ^~~~~~~~~~~~~~~~~~
mm/mm_init.c:787:32: note: in expansion of macro 'pageblock_start_pfn'
787 | if (!pfn_valid(pageblock_start_pfn(pfn))) {
| ^~~~~~~~~~~~~~~~~~~
include/linux/pageblock-flags.h:55:38: warning: left shift count is negative [-Wshift-count-negative]
55 | #define pageblock_nr_pages (1UL << pageblock_order)
| ^~
include/uapi/linux/const.h:32:61: note: in definition of macro '__ALIGN_KERNEL_MASK'
32 | #define __ALIGN_KERNEL_MASK(x, mask) (((x) + (mask)) & ~(mask))
| ^~~~
include/linux/align.h:9:33: note: in expansion of macro '__ALIGN_KERNEL'
9 | #define ALIGN_DOWN(x, a) __ALIGN_KERNEL((x) - ((a) - 1), (a))
| ^~~~~~~~~~~~~~
include/linux/pageblock-flags.h:58:41: note: in expansion of macro 'ALIGN_DOWN'
58 | #define pageblock_start_pfn(pfn) ALIGN_DOWN((pfn), pageblock_nr_pages)
| ^~~~~~~~~~
include/linux/pageblock-flags.h:58:59: note: in expansion of macro 'pageblock_nr_pages'
58 | #define pageblock_start_pfn(pfn) ALIGN_DOWN((pfn), pageblock_nr_pages)
| ^~~~~~~~~~~~~~~~~~
mm/mm_init.c:787:32: note: in expansion of macro 'pageblock_start_pfn'
787 | if (!pfn_valid(pageblock_start_pfn(pfn))) {
| ^~~~~~~~~~~~~~~~~~~
include/linux/pageblock-flags.h:55:38: warning: left shift count is negative [-Wshift-count-negative]
55 | #define pageblock_nr_pages (1UL << pageblock_order)
| ^~
include/uapi/linux/const.h:32:50: note: in definition of macro '__ALIGN_KERNEL_MASK'
32 | #define __ALIGN_KERNEL_MASK(x, mask) (((x) + (mask)) & ~(mask))
| ^~~~
include/linux/align.h:8:33: note: in expansion of macro '__ALIGN_KERNEL'
8 | #define ALIGN(x, a) __ALIGN_KERNEL((x), (a))
| ^~~~~~~~~~~~~~
include/linux/pageblock-flags.h:59:41: note: in expansion of macro 'ALIGN'
59 | #define pageblock_end_pfn(pfn) ALIGN((pfn) + 1, pageblock_nr_pages)
| ^~~~~
include/linux/pageblock-flags.h:59:58: note: in expansion of macro 'pageblock_nr_pages'
59 | #define pageblock_end_pfn(pfn) ALIGN((pfn) + 1, pageblock_nr_pages)
| ^~~~~~~~~~~~~~~~~~
mm/mm_init.c:788:31: note: in expansion of macro 'pageblock_end_pfn'
788 | pfn = pageblock_end_pfn(pfn) - 1;
| ^~~~~~~~~~~~~~~~~
include/linux/pageblock-flags.h:55:38: warning: left shift count is negative [-Wshift-count-negative]
55 | #define pageblock_nr_pages (1UL << pageblock_order)
| ^~
include/uapi/linux/const.h:32:61: note: in definition of macro '__ALIGN_KERNEL_MASK'
32 | #define __ALIGN_KERNEL_MASK(x, mask) (((x) + (mask)) & ~(mask))
| ^~~~
include/linux/align.h:8:33: note: in expansion of macro '__ALIGN_KERNEL'
8 | #define ALIGN(x, a) __ALIGN_KERNEL((x), (a))
| ^~~~~~~~~~~~~~
include/linux/pageblock-flags.h:59:41: note: in expansion of macro 'ALIGN'
59 | #define pageblock_end_pfn(pfn) ALIGN((pfn) + 1, pageblock_nr_pages)
| ^~~~~
include/linux/pageblock-flags.h:59:58: note: in expansion of macro 'pageblock_nr_pages'
59 | #define pageblock_end_pfn(pfn) ALIGN((pfn) + 1, pageblock_nr_pages)
| ^~~~~~~~~~~~~~~~~~
mm/mm_init.c:788:31: note: in expansion of macro 'pageblock_end_pfn'
788 | pfn = pageblock_end_pfn(pfn) - 1;
| ^~~~~~~~~~~~~~~~~
mm/mm_init.c: In function 'memmap_init_range':
include/linux/pageblock-flags.h:55:38: warning: left shift count is negative [-Wshift-count-negative]
55 | #define pageblock_nr_pages (1UL << pageblock_order)
| ^~
include/linux/align.h:13:62: note: in definition of macro 'IS_ALIGNED'
13 | #define IS_ALIGNED(x, a) (((x) & ((typeof(x))(a) - 1)) == 0)
| ^
include/linux/pageblock-flags.h:57:51: note: in expansion of macro 'pageblock_nr_pages'
57 | #define pageblock_aligned(pfn) IS_ALIGNED((pfn), pageblock_nr_pages)
| ^~~~~~~~~~~~~~~~~~
mm/mm_init.c:863:21: note: in expansion of macro 'pageblock_aligned'
863 | if (pageblock_aligned(pfn)) {
| ^~~~~~~~~~~~~~~~~
In file included from include/linux/mmzone.h:19,
from include/linux/gfp.h:7,
from include/linux/xarray.h:15,
from include/linux/radix-tree.h:21,
from include/linux/idr.h:15,
from include/linux/kernfs.h:12,
from include/linux/sysfs.h:16,
from include/linux/kobject.h:20,
from mm/mm_init.c:11:
mm/mm_init.c: In function 'usemap_size':
include/linux/pageblock-flags.h:55:38: warning: left shift count is negative [-Wshift-count-negative]
55 | #define pageblock_nr_pages (1UL << pageblock_order)
| ^~
mm/mm_init.c:1384:39: note: in expansion of macro 'pageblock_nr_pages'
1384 | zonesize += zone_start_pfn & (pageblock_nr_pages-1);
| ^~~~~~~~~~~~~~~~~~
include/linux/pageblock-flags.h:55:38: warning: left shift count is negative [-Wshift-count-negative]
55 | #define pageblock_nr_pages (1UL << pageblock_order)
| ^~
include/linux/math.h:61:25: note: in definition of macro 'roundup'
61 | typeof(y) __y = y; \
| ^
mm/mm_init.c:1385:40: note: in expansion of macro 'pageblock_nr_pages'
1385 | usemapsize = roundup(zonesize, pageblock_nr_pages);
| ^~~~~~~~~~~~~~~~~~
>> mm/mm_init.c:1386:33: warning: right shift count is negative [-Wshift-count-negative]
1386 | usemapsize = usemapsize >> pageblock_order;
| ^~
mm/mm_init.c: In function 'alloc_node_mem_map':
include/linux/mmzone.h:33:31: warning: left shift count is negative [-Wshift-count-negative]
33 | #define MAX_ORDER_NR_PAGES (1 << MAX_ORDER)
| ^~
mm/mm_init.c:1587:43: note: in expansion of macro 'MAX_ORDER_NR_PAGES'
1587 | start = pgdat->node_start_pfn & ~(MAX_ORDER_NR_PAGES - 1);
| ^~~~~~~~~~~~~~~~~~
include/linux/mmzone.h:33:31: warning: left shift count is negative [-Wshift-count-negative]
33 | #define MAX_ORDER_NR_PAGES (1 << MAX_ORDER)
| ^~
include/uapi/linux/const.h:32:50: note: in definition of macro '__ALIGN_KERNEL_MASK'
32 | #define __ALIGN_KERNEL_MASK(x, mask) (((x) + (mask)) & ~(mask))
| ^~~~
include/linux/align.h:8:33: note: in expansion of macro '__ALIGN_KERNEL'
8 | #define ALIGN(x, a) __ALIGN_KERNEL((x), (a))
| ^~~~~~~~~~~~~~
mm/mm_init.c:1600:23: note: in expansion of macro 'ALIGN'
1600 | end = ALIGN(end, MAX_ORDER_NR_PAGES);
| ^~~~~
mm/mm_init.c:1600:34: note: in expansion of macro 'MAX_ORDER_NR_PAGES'
1600 | end = ALIGN(end, MAX_ORDER_NR_PAGES);
| ^~~~~~~~~~~~~~~~~~
include/linux/mmzone.h:33:31: warning: left shift count is negative [-Wshift-count-negative]
33 | #define MAX_ORDER_NR_PAGES (1 << MAX_ORDER)
| ^~
include/uapi/linux/const.h:32:61: note: in definition of macro '__ALIGN_KERNEL_MASK'
32 | #define __ALIGN_KERNEL_MASK(x, mask) (((x) + (mask)) & ~(mask))
| ^~~~
include/linux/align.h:8:33: note: in expansion of macro '__ALIGN_KERNEL'
8 | #define ALIGN(x, a) __ALIGN_KERNEL((x), (a))
| ^~~~~~~~~~~~~~
mm/mm_init.c:1600:23: note: in expansion of macro 'ALIGN'
1600 | end = ALIGN(end, MAX_ORDER_NR_PAGES);
| ^~~~~
mm/mm_init.c:1600:34: note: in expansion of macro 'MAX_ORDER_NR_PAGES'
1600 | end = ALIGN(end, MAX_ORDER_NR_PAGES);
| ^~~~~~~~~~~~~~~~~~
vim +1386 mm/mm_init.c
1371
1372 #ifndef CONFIG_SPARSEMEM
1373 /*
1374 * Calculate the size of the zone->blockflags rounded to an unsigned long
1375 * Start by making sure zonesize is a multiple of pageblock_order by rounding
1376 * up. Then use 1 NR_PAGEBLOCK_BITS worth of bits per pageblock, finally
1377 * round what is now in bits to nearest long in bits, then return it in
1378 * bytes.
1379 */
1380 static unsigned long __init usemap_size(unsigned long zone_start_pfn, unsigned long zonesize)
1381 {
1382 unsigned long usemapsize;
1383
1384 zonesize += zone_start_pfn & (pageblock_nr_pages-1);
1385 usemapsize = roundup(zonesize, pageblock_nr_pages);
> 1386 usemapsize = usemapsize >> pageblock_order;
1387 usemapsize *= NR_PAGEBLOCK_BITS;
1388 usemapsize = roundup(usemapsize, 8 * sizeof(unsigned long));
1389
1390 return usemapsize / 8;
1391 }
1392
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [akpm-mm:mm-unstable 269/293] mm/mm_init.c:1386:33: warning: right shift count is negative
2023-03-23 11:01 [akpm-mm:mm-unstable 269/293] mm/mm_init.c:1386:33: warning: right shift count is negative kernel test robot
@ 2023-03-23 12:27 ` Mike Rapoport
0 siblings, 0 replies; 2+ messages in thread
From: Mike Rapoport @ 2023-03-23 12:27 UTC (permalink / raw)
To: kernel test robot
Cc: oe-kbuild-all, Andrew Morton, Linux Memory Management List
On Thu, Mar 23, 2023 at 07:01:38PM +0800, kernel test robot wrote:
> Hi Mike,
>
> FYI, the error/warning was bisected to this commit, please ignore it if it's irrelevant.
>
> tree: https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-unstable
> head: 51551d71edbc998fd8c8afa7312db3d270f5998e
> commit: a37d26b620530076879100bb6e3953458bf069fe [269/293] mm: move most of core MM initialization to mm/mm_init.c
> config: loongarch-allnoconfig (https://download.01.org/0day-ci/archive/20230323/202303231850.ZgGa5u2h-lkp@intel.com/config)
> compiler: loongarch64-linux-gcc (GCC) 12.1.0
> reproduce (this is a W=1 build):
> wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
> chmod +x ~/bin/make.cross
> # https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git/commit/?id=a37d26b620530076879100bb6e3953458bf069fe
> git remote add akpm-mm https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git
> git fetch --no-tags akpm-mm mm-unstable
> git checkout a37d26b620530076879100bb6e3953458bf069fe
> # save the config file
> mkdir build_dir && cp config build_dir/.config
> COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=loongarch olddefconfig
> COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=loongarch SHELL=/bin/bash
>
> If you fix the issue, kindly add following tag where applicable
> | Reported-by: kernel test robot <lkp@intel.com>
> | Link: https://lore.kernel.org/oe-kbuild-all/202303231850.ZgGa5u2h-lkp@intel.com/
>
> All warnings (new ones prefixed by >>):
These are old warnings, they just moved from mm/page_alloc.c to
mm/mm_init.c
> 58 | #define pageblock_start_pfn(pfn) ALIGN_DOWN((pfn), pageblock_nr_pages)
> | ^~~~~~~~~~
> include/linux/pageblock-flags.h:58:59: note: in expansion of macro 'pageblock_nr_pages'
> 58 | #define pageblock_start_pfn(pfn) ALIGN_DOWN((pfn), pageblock_nr_pages)
> | ^~~~~~~~~~~~~~~~~~
> mm/mm_init.c:787:32: note: in expansion of macro 'pageblock_start_pfn'
> 787 | if (!pfn_valid(pageblock_start_pfn(pfn))) {
> | ^~~~~~~~~~~~~~~~~~~
> include/linux/pageblock-flags.h:55:38: warning: left shift count is negative [-Wshift-count-negative]
> 55 | #define pageblock_nr_pages (1UL << pageblock_order)
> | ^~
> include/uapi/linux/const.h:32:61: note: in definition of macro '__ALIGN_KERNEL_MASK'
> 32 | #define __ALIGN_KERNEL_MASK(x, mask) (((x) + (mask)) & ~(mask))
> | ^~~~
> include/linux/align.h:9:33: note: in expansion of macro '__ALIGN_KERNEL'
> 9 | #define ALIGN_DOWN(x, a) __ALIGN_KERNEL((x) - ((a) - 1), (a))
> | ^~~~~~~~~~~~~~
> include/linux/pageblock-flags.h:58:41: note: in expansion of macro 'ALIGN_DOWN'
> 58 | #define pageblock_start_pfn(pfn) ALIGN_DOWN((pfn), pageblock_nr_pages)
> | ^~~~~~~~~~
> include/linux/pageblock-flags.h:58:59: note: in expansion of macro 'pageblock_nr_pages'
> 58 | #define pageblock_start_pfn(pfn) ALIGN_DOWN((pfn), pageblock_nr_pages)
> | ^~~~~~~~~~~~~~~~~~
> mm/mm_init.c:787:32: note: in expansion of macro 'pageblock_start_pfn'
> 787 | if (!pfn_valid(pageblock_start_pfn(pfn))) {
> | ^~~~~~~~~~~~~~~~~~~
> include/linux/pageblock-flags.h:55:38: warning: left shift count is negative [-Wshift-count-negative]
> 55 | #define pageblock_nr_pages (1UL << pageblock_order)
> | ^~
> include/uapi/linux/const.h:32:50: note: in definition of macro '__ALIGN_KERNEL_MASK'
> 32 | #define __ALIGN_KERNEL_MASK(x, mask) (((x) + (mask)) & ~(mask))
> | ^~~~
> include/linux/align.h:8:33: note: in expansion of macro '__ALIGN_KERNEL'
> 8 | #define ALIGN(x, a) __ALIGN_KERNEL((x), (a))
> | ^~~~~~~~~~~~~~
> include/linux/pageblock-flags.h:59:41: note: in expansion of macro 'ALIGN'
> 59 | #define pageblock_end_pfn(pfn) ALIGN((pfn) + 1, pageblock_nr_pages)
> | ^~~~~
> include/linux/pageblock-flags.h:59:58: note: in expansion of macro 'pageblock_nr_pages'
> 59 | #define pageblock_end_pfn(pfn) ALIGN((pfn) + 1, pageblock_nr_pages)
> | ^~~~~~~~~~~~~~~~~~
> mm/mm_init.c:788:31: note: in expansion of macro 'pageblock_end_pfn'
> 788 | pfn = pageblock_end_pfn(pfn) - 1;
> | ^~~~~~~~~~~~~~~~~
> include/linux/pageblock-flags.h:55:38: warning: left shift count is negative [-Wshift-count-negative]
> 55 | #define pageblock_nr_pages (1UL << pageblock_order)
> | ^~
> include/uapi/linux/const.h:32:61: note: in definition of macro '__ALIGN_KERNEL_MASK'
> 32 | #define __ALIGN_KERNEL_MASK(x, mask) (((x) + (mask)) & ~(mask))
> | ^~~~
> include/linux/align.h:8:33: note: in expansion of macro '__ALIGN_KERNEL'
> 8 | #define ALIGN(x, a) __ALIGN_KERNEL((x), (a))
> | ^~~~~~~~~~~~~~
> include/linux/pageblock-flags.h:59:41: note: in expansion of macro 'ALIGN'
> 59 | #define pageblock_end_pfn(pfn) ALIGN((pfn) + 1, pageblock_nr_pages)
> | ^~~~~
> include/linux/pageblock-flags.h:59:58: note: in expansion of macro 'pageblock_nr_pages'
> 59 | #define pageblock_end_pfn(pfn) ALIGN((pfn) + 1, pageblock_nr_pages)
> | ^~~~~~~~~~~~~~~~~~
> mm/mm_init.c:788:31: note: in expansion of macro 'pageblock_end_pfn'
> 788 | pfn = pageblock_end_pfn(pfn) - 1;
> | ^~~~~~~~~~~~~~~~~
> mm/mm_init.c: In function 'memmap_init_range':
> include/linux/pageblock-flags.h:55:38: warning: left shift count is negative [-Wshift-count-negative]
> 55 | #define pageblock_nr_pages (1UL << pageblock_order)
> | ^~
> include/linux/align.h:13:62: note: in definition of macro 'IS_ALIGNED'
> 13 | #define IS_ALIGNED(x, a) (((x) & ((typeof(x))(a) - 1)) == 0)
> | ^
> include/linux/pageblock-flags.h:57:51: note: in expansion of macro 'pageblock_nr_pages'
> 57 | #define pageblock_aligned(pfn) IS_ALIGNED((pfn), pageblock_nr_pages)
> | ^~~~~~~~~~~~~~~~~~
> mm/mm_init.c:863:21: note: in expansion of macro 'pageblock_aligned'
> 863 | if (pageblock_aligned(pfn)) {
> | ^~~~~~~~~~~~~~~~~
> In file included from include/linux/mmzone.h:19,
> from include/linux/gfp.h:7,
> from include/linux/xarray.h:15,
> from include/linux/radix-tree.h:21,
> from include/linux/idr.h:15,
> from include/linux/kernfs.h:12,
> from include/linux/sysfs.h:16,
> from include/linux/kobject.h:20,
> from mm/mm_init.c:11:
> mm/mm_init.c: In function 'usemap_size':
> include/linux/pageblock-flags.h:55:38: warning: left shift count is negative [-Wshift-count-negative]
> 55 | #define pageblock_nr_pages (1UL << pageblock_order)
> | ^~
> mm/mm_init.c:1384:39: note: in expansion of macro 'pageblock_nr_pages'
> 1384 | zonesize += zone_start_pfn & (pageblock_nr_pages-1);
> | ^~~~~~~~~~~~~~~~~~
> include/linux/pageblock-flags.h:55:38: warning: left shift count is negative [-Wshift-count-negative]
> 55 | #define pageblock_nr_pages (1UL << pageblock_order)
> | ^~
> include/linux/math.h:61:25: note: in definition of macro 'roundup'
> 61 | typeof(y) __y = y; \
> | ^
> mm/mm_init.c:1385:40: note: in expansion of macro 'pageblock_nr_pages'
> 1385 | usemapsize = roundup(zonesize, pageblock_nr_pages);
> | ^~~~~~~~~~~~~~~~~~
> >> mm/mm_init.c:1386:33: warning: right shift count is negative [-Wshift-count-negative]
> 1386 | usemapsize = usemapsize >> pageblock_order;
> | ^~
> mm/mm_init.c: In function 'alloc_node_mem_map':
> include/linux/mmzone.h:33:31: warning: left shift count is negative [-Wshift-count-negative]
> 33 | #define MAX_ORDER_NR_PAGES (1 << MAX_ORDER)
> | ^~
> mm/mm_init.c:1587:43: note: in expansion of macro 'MAX_ORDER_NR_PAGES'
> 1587 | start = pgdat->node_start_pfn & ~(MAX_ORDER_NR_PAGES - 1);
> | ^~~~~~~~~~~~~~~~~~
> include/linux/mmzone.h:33:31: warning: left shift count is negative [-Wshift-count-negative]
> 33 | #define MAX_ORDER_NR_PAGES (1 << MAX_ORDER)
> | ^~
> include/uapi/linux/const.h:32:50: note: in definition of macro '__ALIGN_KERNEL_MASK'
> 32 | #define __ALIGN_KERNEL_MASK(x, mask) (((x) + (mask)) & ~(mask))
> | ^~~~
> include/linux/align.h:8:33: note: in expansion of macro '__ALIGN_KERNEL'
> 8 | #define ALIGN(x, a) __ALIGN_KERNEL((x), (a))
> | ^~~~~~~~~~~~~~
> mm/mm_init.c:1600:23: note: in expansion of macro 'ALIGN'
> 1600 | end = ALIGN(end, MAX_ORDER_NR_PAGES);
> | ^~~~~
> mm/mm_init.c:1600:34: note: in expansion of macro 'MAX_ORDER_NR_PAGES'
> 1600 | end = ALIGN(end, MAX_ORDER_NR_PAGES);
> | ^~~~~~~~~~~~~~~~~~
> include/linux/mmzone.h:33:31: warning: left shift count is negative [-Wshift-count-negative]
> 33 | #define MAX_ORDER_NR_PAGES (1 << MAX_ORDER)
> | ^~
> include/uapi/linux/const.h:32:61: note: in definition of macro '__ALIGN_KERNEL_MASK'
> 32 | #define __ALIGN_KERNEL_MASK(x, mask) (((x) + (mask)) & ~(mask))
> | ^~~~
> include/linux/align.h:8:33: note: in expansion of macro '__ALIGN_KERNEL'
> 8 | #define ALIGN(x, a) __ALIGN_KERNEL((x), (a))
> | ^~~~~~~~~~~~~~
> mm/mm_init.c:1600:23: note: in expansion of macro 'ALIGN'
> 1600 | end = ALIGN(end, MAX_ORDER_NR_PAGES);
> | ^~~~~
> mm/mm_init.c:1600:34: note: in expansion of macro 'MAX_ORDER_NR_PAGES'
> 1600 | end = ALIGN(end, MAX_ORDER_NR_PAGES);
> | ^~~~~~~~~~~~~~~~~~
>
>
> vim +1386 mm/mm_init.c
>
> 1371
> 1372 #ifndef CONFIG_SPARSEMEM
> 1373 /*
> 1374 * Calculate the size of the zone->blockflags rounded to an unsigned long
> 1375 * Start by making sure zonesize is a multiple of pageblock_order by rounding
> 1376 * up. Then use 1 NR_PAGEBLOCK_BITS worth of bits per pageblock, finally
> 1377 * round what is now in bits to nearest long in bits, then return it in
> 1378 * bytes.
> 1379 */
> 1380 static unsigned long __init usemap_size(unsigned long zone_start_pfn, unsigned long zonesize)
> 1381 {
> 1382 unsigned long usemapsize;
> 1383
> 1384 zonesize += zone_start_pfn & (pageblock_nr_pages-1);
> 1385 usemapsize = roundup(zonesize, pageblock_nr_pages);
> > 1386 usemapsize = usemapsize >> pageblock_order;
> 1387 usemapsize *= NR_PAGEBLOCK_BITS;
> 1388 usemapsize = roundup(usemapsize, 8 * sizeof(unsigned long));
> 1389
> 1390 return usemapsize / 8;
> 1391 }
> 1392
>
> --
> 0-DAY CI Kernel Test Service
> https://github.com/intel/lkp-tests
--
Sincerely yours,
Mike.
^ permalink raw reply [flat|nested] 2+ messages in thread
end of thread, other threads:[~2023-03-23 12:27 UTC | newest]
Thread overview: 2+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2023-03-23 11:01 [akpm-mm:mm-unstable 269/293] mm/mm_init.c:1386:33: warning: right shift count is negative kernel test robot
2023-03-23 12:27 ` Mike Rapoport
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).