error[E0425]: cannot find function `is_vmalloc_addr` in crate `bindings`

[kernel test robot]

Hi Shivam,

FYI, the error/warning still remains.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   6779b50faa562e6cca1aa6a4649a4d764c6c7e28
commit: 47ac2a4b5cd8f0cb826f6368c2fc0eeb97e5d55f rust: kvec: implement shrink_to for KVVec
date:   3 months ago
config: riscv-randconfig-r073-20260522 (https://download.01.org/0day-ci/archive/20260522/202605220811.LRplxeBR-lkp@xxxxxxxxx/config)
compiler: clang version 23.0.0git (https://github.com/llvm/llvm-project 5bac06718f502014fade905512f1d26d578a18f3)
rustc: rustc 1.88.0 (6b00bc388 2025-06-23)
smatch: v0.5.0-9185-gbcc58b9c
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260522/202605220811.LRplxeBR-lkp@xxxxxxxxx/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
| Fixes: 47ac2a4b5cd8 ("rust: kvec: implement shrink_to for KVVec")
| Reported-by: kernel test robot <lkp@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202605220811.LRplxeBR-lkp@xxxxxxxxx/

All errors (new ones prefixed by >>):

   In file included from include/linux/io.h:12:
   In file included from arch/riscv/include/asm/io.h:140:
   include/asm-generic/io.h:854:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
   854 |         insl(addr, buffer, count);
   |         ^~~~~~~~~~~~~~~~~~~~~~~~~
   arch/riscv/include/asm/io.h:110:53: note: expanded from macro 'insl'
   110 | #define insl(addr, buffer, count) __insl(PCI_IOBASE + (addr), buffer, count)
   |                                          ~~~~~~~~~~ ^
   In file included from kernel/sched/rq-offsets.c:5:
   In file included from kernel/sched/sched.h:28:
   In file included from include/linux/cgroup_api.h:1:
   In file included from include/linux/cgroup.h:27:
   In file included from include/linux/kernel_stat.h:8:
   In file included from include/linux/interrupt.h:11:
   In file included from include/linux/hardirq.h:11:
   In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
   In file included from include/asm-generic/hardirq.h:17:
   In file included from include/linux/irq.h:20:
   In file included from include/linux/io.h:12:
   In file included from arch/riscv/include/asm/io.h:140:
   include/asm-generic/io.h:863:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
   863 |         outsb(addr, buffer, count);
   |         ^~~~~~~~~~~~~~~~~~~~~~~~~~
   arch/riscv/include/asm/io.h:122:55: note: expanded from macro 'outsb'
   122 | #define outsb(addr, buffer, count) __outsb(PCI_IOBASE + (addr), buffer, count)
   |                                            ~~~~~~~~~~ ^
   In file included from kernel/sched/rq-offsets.c:5:
   In file included from kernel/sched/sched.h:28:
   In file included from include/linux/cgroup_api.h:1:
   In file included from include/linux/cgroup.h:27:
   In file included from include/linux/kernel_stat.h:8:
   In file included from include/linux/interrupt.h:11:
   In file included from include/linux/hardirq.h:11:
   In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
   In file included from include/asm-generic/hardirq.h:17:
   In file included from include/linux/irq.h:20:
   In file included from include/linux/io.h:12:
   In file included from arch/riscv/include/asm/io.h:140:
   include/asm-generic/io.h:872:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
   872 |         outsw(addr, buffer, count);
   |         ^~~~~~~~~~~~~~~~~~~~~~~~~~
   arch/riscv/include/asm/io.h:123:55: note: expanded from macro 'outsw'
   123 | #define outsw(addr, buffer, count) __outsw(PCI_IOBASE + (addr), buffer, count)
   |                                            ~~~~~~~~~~ ^
   In file included from kernel/sched/rq-offsets.c:5:
   In file included from kernel/sched/sched.h:28:
   In file included from include/linux/cgroup_api.h:1:
   In file included from include/linux/cgroup.h:27:
   In file included from include/linux/kernel_stat.h:8:
   In file included from include/linux/interrupt.h:11:
   In file included from include/linux/hardirq.h:11:
   In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
   In file included from include/asm-generic/hardirq.h:17:
   In file included from include/linux/irq.h:20:
   In file included from include/linux/io.h:12:
   In file included from arch/riscv/include/asm/io.h:140:
   include/asm-generic/io.h:881:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
   881 |         outsl(addr, buffer, count);
   |         ^~~~~~~~~~~~~~~~~~~~~~~~~~
   arch/riscv/include/asm/io.h:124:55: note: expanded from macro 'outsl'
   124 | #define outsl(addr, buffer, count) __outsl(PCI_IOBASE + (addr), buffer, count)
   |                                            ~~~~~~~~~~ ^
   In file included from kernel/sched/rq-offsets.c:5:
   In file included from kernel/sched/sched.h:28:
   In file included from include/linux/cgroup_api.h:1:
   In file included from include/linux/cgroup.h:27:
   In file included from include/linux/kernel_stat.h:8:
   In file included from include/linux/interrupt.h:11:
   In file included from include/linux/hardirq.h:11:
   In file included from ./arch/riscv/include/generated/asm/hardirq.h:1:
   In file included from include/asm-generic/hardirq.h:17:
   In file included from include/linux/irq.h:20:
   In file included from include/linux/io.h:12:
   In file included from arch/riscv/include/asm/io.h:140:
   include/asm-generic/io.h:1209:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
   1209 |         return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
   |                                                   ~~~~~~~~~~ ^
   7 warnings generated.
   llvm-nm: error: rust/helpers/helpers.o: No such file or directory
   clang diag: arch/riscv/include/asm/io.h:108:53: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
   clang diag: arch/riscv/include/asm/io.h:109:53: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
   clang diag: arch/riscv/include/asm/io.h:110:53: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
   clang diag: arch/riscv/include/asm/io.h:122:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
   clang diag: arch/riscv/include/asm/io.h:123:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
   clang diag: arch/riscv/include/asm/io.h:124:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
   clang diag: include/asm-generic/io.h:1209:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
   clang diag: arch/riscv/include/asm/io.h:108:53: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
   clang diag: arch/riscv/include/asm/io.h:109:53: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
   clang diag: arch/riscv/include/asm/io.h:110:53: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
   clang diag: arch/riscv/include/asm/io.h:122:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
   clang diag: arch/riscv/include/asm/io.h:123:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
   clang diag: arch/riscv/include/asm/io.h:124:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
   clang diag: include/asm-generic/io.h:1209:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
   clang diag: arch/riscv/include/asm/io.h:108:53: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
   clang diag: arch/riscv/include/asm/io.h:109:53: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
   clang diag: arch/riscv/include/asm/io.h:110:53: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
   clang diag: arch/riscv/include/asm/io.h:122:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
   clang diag: arch/riscv/include/asm/io.h:123:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
   clang diag: arch/riscv/include/asm/io.h:124:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
   clang diag: include/asm-generic/io.h:1209:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
>> error[E0425]: cannot find function `is_vmalloc_addr` in crate `bindings`
   --> rust/kernel/alloc/kvec.rs:781:32
   |
   781 |         if !unsafe { bindings::is_vmalloc_addr(self.ptr.as_ptr().cast()) } {
   |                                ^^^^^^^^^^^^^^^ not found in `bindings`

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