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linux/arch/hexagon/include/asm
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Willem de Bruijn 5892138e30 hexagon: fix using plain integer as NULL pointer warning in cmpxchg 
[ Upstream commit 8a20030038 ]

Sparse reports

    net/ipv4/inet_diag.c:1511:17: sparse: sparse: Using plain integer as NULL pointer

Due to this code calling cmpxchg on a non-integer type
struct inet_diag_handler *

    return !cmpxchg((const struct inet_diag_handler**)&inet_diag_table[type],
                    NULL, h) ? 0 : -EEXIST;

While hexagon's cmpxchg assigns an integer value to a variable of this
type.

    __typeof__(*(ptr)) __oldval = 0;

Update this assignment to cast 0 to the correct type.

The original issue is easily reproduced at head with the below block,
and is absent after this change.

    make LLVM=1 ARCH=hexagon defconfig
    make C=1 LLVM=1 ARCH=hexagon net/ipv4/inet_diag.o

Fixes: 99a70aa051 ("Hexagon: Add processor and system headers")
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202411091538.PGSTqUBi-lkp@intel.com/
Signed-off-by: Willem de Bruijn <willemb@google.com>
Tested-by: Christian Gmeiner <cgmeiner@igalia.com>
Link: https://lore.kernel.org/r/20241203221736.282020-1-willemdebruijn.kernel@gmail.com
Signed-off-by: Brian Cain <bcain@quicinc.com>
Signed-off-by: Brian Cain <brian.cain@oss.qualcomm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2025-02-08 09:58:11 +01:00
..
asm-offsets.h Hexagon: Add processor and system headers 2011-11-01 07:34:18 -07:00
atomic.h locking/atomic: treewide: delete arch_atomic_*() kerneldoc 2023-06-05 09:57:24 +02:00
bitops.h provide arch_test_bit_acquire for architectures that define test_bit 2022-08-27 09:49:54 -07:00
cache.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 267 2019-06-05 17:30:29 +02:00
cacheflush.h mm: rationalise flush_icache_pages() and flush_icache_page() 2023-08-24 16:20:25 -07:00
checksum.h unify generic instances of csum_partial_copy_nocheck() 2020-08-20 15:45:14 -04:00
cmpxchg.h hexagon: fix using plain integer as NULL pointer warning in cmpxchg 2025-02-08 09:58:11 +01:00
delay.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 267 2019-06-05 17:30:29 +02:00
dma.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 267 2019-06-05 17:30:29 +02:00
elf.h whack-a-mole: USE_ELF_CORE_DUMP 2020-10-25 20:03:05 -04:00
exec.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 267 2019-06-05 17:30:29 +02:00
fixmap.h mm: pgtable: add shortcuts for accessing kernel PMD and PTE 2020-06-09 09:39:13 -07:00
fpu.h Hexagon: Core arch-specific header files 2011-11-01 07:34:18 -07:00
futex.h Hexagon: change jumps to must-extend in futex_atomic_* 2021-05-03 11:04:19 -05:00
hexagon_vm.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 267 2019-06-05 17:30:29 +02:00
intrinsics.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 267 2019-06-05 17:30:29 +02:00
io.h asm/io: remove unnecessary xlate_dev_mem_ptr() and unxlate_dev_mem_ptr() 2023-11-23 10:37:40 +01:00
irq.h hexagon: irq: add prototype for arch_do_IRQ() 2023-12-10 17:21:37 -08:00
irqflags.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 267 2019-06-05 17:30:29 +02:00
Kbuild hexagon: use new system call table 2024-07-10 14:23:38 +02:00
kgdb.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 267 2019-06-05 17:30:29 +02:00
linkage.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 267 2019-06-05 17:30:29 +02:00
mem-layout.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 267 2019-06-05 17:30:29 +02:00
mmu.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 267 2019-06-05 17:30:29 +02:00
mmu_context.h hexagon: use asm-generic/mmu_context.h for no-op implementations 2020-10-27 16:02:35 +01:00
page.h arch: consolidate existing CONFIG_PAGE_SIZE_*KB definitions 2024-03-06 19:28:26 +01:00
perf_event.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 267 2019-06-05 17:30:29 +02:00
pgalloc.h hexagon: convert __pte_free_tlb() to use ptdescs 2023-08-21 13:37:56 -07:00
pgtable.h Add x86 shadow stack support 2023-08-31 12:20:12 -07:00
processor.h kernel: exit: cleanup release_thread() 2022-09-11 21:55:07 -07:00
ptrace.h hexagon: Remove unusable symbols from the ptrace.h uapi 2023-10-25 15:54:24 +02:00
smp.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 267 2019-06-05 17:30:29 +02:00
spinlock.h hexagon: parenthesize registers in asm predicates 2020-01-04 13:55:09 -08:00
spinlock_types.h locking: Allow to include asm/spinlock_types.h from linux/spinlock_types_raw.h 2021-12-07 15:14:12 +01:00
string.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 267 2019-06-05 17:30:29 +02:00
suspend.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 267 2019-06-05 17:30:29 +02:00
switch_to.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 267 2019-06-05 17:30:29 +02:00
syscall.h hexagon: define syscall_get_error() and syscall_get_return_value() 2019-07-16 19:23:24 -07:00
syscalls.h hexagon: fix fadvise64_64 calling conventions 2024-06-25 15:57:37 +02:00
thread_info.h uaccess: remove CONFIG_SET_FS 2022-02-25 09:36:06 +01:00
time.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 267 2019-06-05 17:30:29 +02:00
timex.h hexagon: clean up timer-regs.h 2021-11-20 10:35:54 -08:00
tlb.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 267 2019-06-05 17:30:29 +02:00
tlbflush.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 267 2019-06-05 17:30:29 +02:00
traps.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 267 2019-06-05 17:30:29 +02:00
uaccess.h uaccess: generalize access_ok() 2022-02-25 09:36:05 +01:00
unistd.h hexagon: use new system call table 2024-07-10 14:23:38 +02:00
vdso.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 267 2019-06-05 17:30:29 +02:00
vermagic.h arch: split MODULE_ARCH_VERMAGIC definitions out to <asm/vermagic.h> 2020-04-23 10:50:26 +09:00
vm_fault.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 267 2019-06-05 17:30:29 +02:00
vm_mmu.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 267 2019-06-05 17:30:29 +02:00
vmalloc.h mm/vmalloc: Add empty <asm/vmalloc.h> headers and use them from <linux/vmalloc.h> 2019-12-10 10:12:55 +01:00