[PATCH 2/5] arm64: gcs: Use the new common vm_mmap_shadow_stack() helper
From: Catalin Marinas <catalin.marinas@arm.com>
Date: 2026-02-24 17:58:13
Also in:
linux-mm, linux-riscv, lkml
Subsystem:
arm64 port (aarch64 architecture), the rest · Maintainers:
Catalin Marinas, Will Deacon, Linus Torvalds
Replace the arm64 map_shadow_stack() content with a call to vm_mmap_shadow_stack(). Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <will@kernel.org> Cc: Mark Brown <broonie@kernel.org> --- arch/arm64/mm/gcs.c | 14 +------------- 1 file changed, 1 insertion(+), 13 deletions(-)
diff --git a/arch/arm64/mm/gcs.c b/arch/arm64/mm/gcs.c
index 04a23a497f20..680749611a9a 100644
--- a/arch/arm64/mm/gcs.c
+++ b/arch/arm64/mm/gcs.c@@ -12,19 +12,7 @@ static unsigned long alloc_gcs(unsigned long addr, unsigned long size) { - int flags = MAP_ANONYMOUS | MAP_PRIVATE; - struct mm_struct *mm = current->mm; - unsigned long mapped_addr, unused; - - if (addr) - flags |= MAP_FIXED_NOREPLACE; - - mmap_write_lock(mm); - mapped_addr = do_mmap(NULL, addr, size, PROT_READ, flags, - VM_SHADOW_STACK | VM_WRITE, 0, &unused, NULL); - mmap_write_unlock(mm); - - return mapped_addr; + return vm_mmap_shadow_stack(addr, size, 0); } static unsigned long gcs_size(unsigned long size)