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authorKees Cook <keescook@chromium.org>2022-02-20 04:20:02 +0300
committerKees Cook <keescook@chromium.org>2022-02-27 07:32:03 +0300
commit575d6b77fa2697afd2b3a443f7f879faa65ae0ca (patch)
tree9dfb690f0e69086eef55ba4dbbb51a7e0a48ab64 /arch/m68k
parent92652cf986441b18282db6e5bd82afc74e8ed5e9 (diff)
downloadlinux-575d6b77fa2697afd2b3a443f7f879faa65ae0ca.tar.xz
m68k: Implement "current_stack_pointer"
To follow the existing per-arch conventions, add asm "sp" as "current_stack_pointer". This will let it be used in non-arch places (like HARDENED_USERCOPY). Cc: linux-m68k@lists.linux-m68k.org Signed-off-by: Kees Cook <keescook@chromium.org> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Link: https://lore.kernel.org/lkml/CAMuHMdU6msvi0j=mS28GFYbm+uMRk7PkYe+zOM4sDmOVxeibLQ@mail.gmail.com
Diffstat (limited to 'arch/m68k')
-rw-r--r--arch/m68k/Kconfig1
-rw-r--r--arch/m68k/include/asm/current.h4
2 files changed, 4 insertions, 1 deletions
diff --git a/arch/m68k/Kconfig b/arch/m68k/Kconfig
index 936e1803c7c7..f0eac0e2f123 100644
--- a/arch/m68k/Kconfig
+++ b/arch/m68k/Kconfig
@@ -4,6 +4,7 @@ config M68K
default y
select ARCH_32BIT_OFF_T
select ARCH_HAS_BINFMT_FLAT
+ select ARCH_HAS_CURRENT_STACK_POINTER
select ARCH_HAS_DMA_PREP_COHERENT if HAS_DMA && MMU && !COLDFIRE
select ARCH_HAS_SYNC_DMA_FOR_DEVICE if HAS_DMA
select ARCH_HAVE_NMI_SAFE_CMPXCHG if RMW_INSNS
diff --git a/arch/m68k/include/asm/current.h b/arch/m68k/include/asm/current.h
index 6390ef2f7f86..c117907e1276 100644
--- a/arch/m68k/include/asm/current.h
+++ b/arch/m68k/include/asm/current.h
@@ -24,6 +24,8 @@ static inline struct task_struct *get_current(void)
#define current get_current()
-#endif /* CONFNIG_MMU */
+#endif /* CONFIG_MMU */
+
+register unsigned long current_stack_pointer __asm__("sp");
#endif /* !(_M68K_CURRENT_H) */