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UPSTREAM: arm64: Add kasan_hw_tags_enable() prototype to silence sparse

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This function is only called from assembly, no need for a prototype
declaration in a header file. In addition, add #ifdef around the
function since it is only used when CONFIG_KASAN_HW_TAGS.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Reported-by: kernel test robot <lkp@intel.com>
Bug: 254721825
(cherry picked from commit 78cdaf3f42)
Change-Id: I222d17ae6cf5df53c922ef8c126115efaf6d9eee
Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
This commit is contained in:
Catalin Marinas
2022-06-10 18:01:31 +01:00
committed by Todd Kjos
parent 982740822c
commit 2ae46ec391
1 changed files with 6 additions and 0 deletions
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6
arch/arm64/kernel/mte.c
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@@ -248,6 +248,11 @@ static void mte_update_gcr_excl(struct task_struct *task)
SYS_GCR_EL1);
}
#ifdef CONFIG_KASAN_HW_TAGS
/* Only called from assembly, silence sparse */
void __init kasan_hw_tags_enable(struct alt_instr *alt, __le32 *origptr,
__le32 *updptr, int nr_inst);
void __init kasan_hw_tags_enable(struct alt_instr *alt, __le32 *origptr,
__le32 *updptr, int nr_inst)
{
@@ -256,6 +261,7 @@ void __init kasan_hw_tags_enable(struct alt_instr *alt, __le32 *origptr,
if (kasan_hw_tags_enabled())
*updptr = cpu_to_le32(aarch64_insn_gen_nop());
}
#endif
void mte_thread_init_user(void)
{