* [openeuler:openEuler-1.0-LTS 1782/1782] mm/vmalloc.c:217:23: warning: variable 'start' set but not used
@ 2025-09-15 16:08 kernel test robot
0 siblings, 0 replies; only message in thread
From: kernel test robot @ 2025-09-15 16:08 UTC (permalink / raw)
To: kernel, Yang Yingliang; +Cc: oe-kbuild-all
Hi Nicholas,
FYI, the error/warning still remains.
tree: https://gitee.com/openeuler/kernel.git openEuler-1.0-LTS
head: 8975e9a49fdd2f6402cc5fe68bc08d3c2b7a35a5
commit: 3eb01faed2ebb254019a3bb72ce3bdf4d0a9be74 [1782/1782] mm/vmalloc: add vmap_range_noflush variant
config: arm64-allnoconfig (https://download.01.org/0day-ci/archive/20250916/202509160016.RjCI0LQf-lkp@intel.com/config)
compiler: aarch64-linux-gcc (GCC) 15.1.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250916/202509160016.RjCI0LQf-lkp@intel.com/reproduce)
If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202509160016.RjCI0LQf-lkp@intel.com/
All warnings (new ones prefixed by >>):
mm/vmalloc.c: In function 'vmap_range_noflush':
>> mm/vmalloc.c:217:23: warning: variable 'start' set but not used [-Wunused-but-set-variable]
217 | unsigned long start;
| ^~~~~
mm/vmalloc.c: At top level:
mm/vmalloc.c:1417:6: warning: no previous prototype for 'set_iounmap_nonlazy' [-Wmissing-prototypes]
1417 | void set_iounmap_nonlazy(void)
| ^~~~~~~~~~~~~~~~~~~
In file included from arch/arm64/include/asm/atomic.h:36,
from include/linux/atomic.h:7,
from include/asm-generic/bitops/atomic.h:5,
from arch/arm64/include/asm/bitops.h:37,
from include/linux/bitops.h:19,
from include/linux/kernel.h:11,
from include/linux/list.h:9,
from include/linux/preempt.h:11,
from include/linux/spinlock.h:51,
from include/linux/vmalloc.h:5,
from mm/vmalloc.c:11:
In function '__cmpxchg_case_acq_4',
inlined from '__cmpxchg_acq' at arch/arm64/include/asm/cmpxchg.h:141:1,
inlined from 'queued_spin_lock' at include/asm-generic/qspinlock.h:85:8,
inlined from 'do_raw_spin_lock' at include/linux/spinlock.h:180:2,
inlined from '__raw_spin_lock' at include/linux/spinlock_api_smp.h:143:2,
inlined from 'spin_lock' at include/linux/spinlock.h:329:2,
inlined from 'find_vmap_area' at mm/vmalloc.c:1519:2:
arch/arm64/include/asm/atomic_ll_sc.h:259:9: warning: array subscript 'long unsigned int[0]' is partly outside array bounds of 'spinlock_t[1]' {aka 'struct spinlock[1]'} [-Warray-bounds=]
259 | asm volatile( \
| ^~~
arch/arm64/include/asm/atomic_ll_sc.h:283:1: note: in expansion of macro '__CMPXCHG_CASE'
283 | __CMPXCHG_CASE(w, , acq_4, , a, , "memory")
| ^~~~~~~~~~~~~~
In file included from include/linux/spinlock.h:82:
mm/vmalloc.c: In function 'find_vmap_area':
mm/vmalloc.c:557:24: note: object 'vmap_area_lock' of size 4
557 | static DEFINE_SPINLOCK(vmap_area_lock);
| ^~~~~~~~~~~~~~
include/linux/spinlock_types.h:81:44: note: in definition of macro 'DEFINE_SPINLOCK'
81 | #define DEFINE_SPINLOCK(x) spinlock_t x = __SPIN_LOCK_UNLOCKED(x)
| ^
In function '__cmpxchg_case_acq_4',
inlined from '__cmpxchg_acq' at arch/arm64/include/asm/cmpxchg.h:141:1,
inlined from 'queued_spin_lock' at include/asm-generic/qspinlock.h:85:8,
inlined from 'do_raw_spin_lock' at include/linux/spinlock.h:180:2,
inlined from '__raw_spin_lock' at include/linux/spinlock_api_smp.h:143:2,
inlined from 'spin_lock' at include/linux/spinlock.h:329:2,
inlined from 'find_vmap_area' at mm/vmalloc.c:1519:2:
arch/arm64/include/asm/atomic_ll_sc.h:259:9: warning: array subscript 'long unsigned int[0]' is partly outside array bounds of 'spinlock_t[1]' {aka 'struct spinlock[1]'} [-Warray-bounds=]
259 | asm volatile( \
| ^~~
arch/arm64/include/asm/atomic_ll_sc.h:283:1: note: in expansion of macro '__CMPXCHG_CASE'
283 | __CMPXCHG_CASE(w, , acq_4, , a, , "memory")
| ^~~~~~~~~~~~~~
mm/vmalloc.c: In function 'find_vmap_area':
mm/vmalloc.c:557:24: note: object 'vmap_area_lock' of size 4
557 | static DEFINE_SPINLOCK(vmap_area_lock);
| ^~~~~~~~~~~~~~
include/linux/spinlock_types.h:81:44: note: in definition of macro 'DEFINE_SPINLOCK'
81 | #define DEFINE_SPINLOCK(x) spinlock_t x = __SPIN_LOCK_UNLOCKED(x)
| ^
In function '__cmpxchg_case_acq_4',
inlined from '__cmpxchg_acq' at arch/arm64/include/asm/cmpxchg.h:141:1,
inlined from 'queued_spin_lock' at include/asm-generic/qspinlock.h:85:8,
inlined from 'do_raw_spin_lock' at include/linux/spinlock.h:180:2,
inlined from '__raw_spin_lock' at include/linux/spinlock_api_smp.h:143:2,
inlined from 'spin_lock' at include/linux/spinlock.h:329:2,
inlined from 'setup_vmalloc_vm' at mm/vmalloc.c:2111:2:
arch/arm64/include/asm/atomic_ll_sc.h:259:9: warning: array subscript 'long unsigned int[0]' is partly outside array bounds of 'spinlock_t[1]' {aka 'struct spinlock[1]'} [-Warray-bounds=]
259 | asm volatile( \
| ^~~
arch/arm64/include/asm/atomic_ll_sc.h:283:1: note: in expansion of macro '__CMPXCHG_CASE'
283 | __CMPXCHG_CASE(w, , acq_4, , a, , "memory")
| ^~~~~~~~~~~~~~
mm/vmalloc.c: In function 'setup_vmalloc_vm':
mm/vmalloc.c:557:24: note: object 'vmap_area_lock' of size 4
557 | static DEFINE_SPINLOCK(vmap_area_lock);
| ^~~~~~~~~~~~~~
include/linux/spinlock_types.h:81:44: note: in definition of macro 'DEFINE_SPINLOCK'
81 | #define DEFINE_SPINLOCK(x) spinlock_t x = __SPIN_LOCK_UNLOCKED(x)
| ^
In function '__cmpxchg_case_acq_4',
inlined from '__cmpxchg_acq' at arch/arm64/include/asm/cmpxchg.h:141:1,
inlined from 'queued_spin_lock' at include/asm-generic/qspinlock.h:85:8,
inlined from 'do_raw_spin_lock' at include/linux/spinlock.h:180:2,
inlined from '__raw_spin_lock' at include/linux/spinlock_api_smp.h:143:2,
inlined from 'spin_lock' at include/linux/spinlock.h:329:2,
inlined from 'setup_vmalloc_vm' at mm/vmalloc.c:2111:2:
arch/arm64/include/asm/atomic_ll_sc.h:259:9: warning: array subscript 'long unsigned int[0]' is partly outside array bounds of 'spinlock_t[1]' {aka 'struct spinlock[1]'} [-Warray-bounds=]
259 | asm volatile( \
| ^~~
arch/arm64/include/asm/atomic_ll_sc.h:283:1: note: in expansion of macro '__CMPXCHG_CASE'
283 | __CMPXCHG_CASE(w, , acq_4, , a, , "memory")
| ^~~~~~~~~~~~~~
mm/vmalloc.c: In function 'setup_vmalloc_vm':
mm/vmalloc.c:557:24: note: object 'vmap_area_lock' of size 4
557 | static DEFINE_SPINLOCK(vmap_area_lock);
| ^~~~~~~~~~~~~~
include/linux/spinlock_types.h:81:44: note: in definition of macro 'DEFINE_SPINLOCK'
81 | #define DEFINE_SPINLOCK(x) spinlock_t x = __SPIN_LOCK_UNLOCKED(x)
| ^
In function '__cmpxchg_case_acq_4',
inlined from '__cmpxchg_acq' at arch/arm64/include/asm/cmpxchg.h:141:1,
vim +/start +217 mm/vmalloc.c
004cface9c1c0b Nicholas Piggin 2021-10-29 211
3eb01faed2ebb2 Nicholas Piggin 2021-10-29 212 static int vmap_range_noflush(unsigned long addr, unsigned long end,
004cface9c1c0b Nicholas Piggin 2021-10-29 213 phys_addr_t phys_addr, pgprot_t prot,
004cface9c1c0b Nicholas Piggin 2021-10-29 214 unsigned int max_page_shift)
004cface9c1c0b Nicholas Piggin 2021-10-29 215 {
004cface9c1c0b Nicholas Piggin 2021-10-29 216 pgd_t *pgd;
004cface9c1c0b Nicholas Piggin 2021-10-29 @217 unsigned long start;
004cface9c1c0b Nicholas Piggin 2021-10-29 218 unsigned long next;
004cface9c1c0b Nicholas Piggin 2021-10-29 219 int err;
004cface9c1c0b Nicholas Piggin 2021-10-29 220
004cface9c1c0b Nicholas Piggin 2021-10-29 221 might_sleep();
004cface9c1c0b Nicholas Piggin 2021-10-29 222 BUG_ON(addr >= end);
004cface9c1c0b Nicholas Piggin 2021-10-29 223
004cface9c1c0b Nicholas Piggin 2021-10-29 224 start = addr;
004cface9c1c0b Nicholas Piggin 2021-10-29 225 pgd = pgd_offset_k(addr);
004cface9c1c0b Nicholas Piggin 2021-10-29 226 do {
004cface9c1c0b Nicholas Piggin 2021-10-29 227 next = pgd_addr_end(addr, end);
004cface9c1c0b Nicholas Piggin 2021-10-29 228 err = vmap_p4d_range(pgd, addr, next, phys_addr, prot, max_page_shift);
004cface9c1c0b Nicholas Piggin 2021-10-29 229 if (err)
004cface9c1c0b Nicholas Piggin 2021-10-29 230 break;
004cface9c1c0b Nicholas Piggin 2021-10-29 231 } while (pgd++, phys_addr += (next - addr), addr = next, addr != end);
004cface9c1c0b Nicholas Piggin 2021-10-29 232
3eb01faed2ebb2 Nicholas Piggin 2021-10-29 233 return err;
3eb01faed2ebb2 Nicholas Piggin 2021-10-29 234 }
3eb01faed2ebb2 Nicholas Piggin 2021-10-29 235
:::::: The code at line 217 was first introduced by commit
:::::: 004cface9c1c0b6351473934a4ce452193e05b07 mm: Move vmap_range from mm/ioremap.c to mm/vmalloc.c
:::::: TO: Nicholas Piggin <npiggin@gmail.com>
:::::: CC: Yang Yingliang <yangyingliang@huawei.com>
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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2025-09-15 16:08 [openeuler:openEuler-1.0-LTS 1782/1782] mm/vmalloc.c:217:23: warning: variable 'start' set but not used kernel test robot
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