Commit 575d6b77 authored by Kees Cook's avatar Kees Cook
Browse files

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: default avatarKees Cook <keescook@chromium.org>
Acked-by: default avatarGeert Uytterhoeven <geert@linux-m68k.org>
Link: https://lore.kernel.org/lkml/CAMuHMdU6msvi0j=mS28GFYbm+uMRk7PkYe+zOM4sDmOVxeibLQ@mail.gmail.com
parent 92652cf9

arch/m68k/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -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

arch/m68k/include/asm/current.h

+3 −1
Original line number Diff line number Diff line
@@ -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) */