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Commit 4585eaff authored by Russell King's avatar Russell King
Browse files

ARM: use get_cr() rather than cr_alignment 



Rather than reading the cr_alignment variable, use get_cr() to read
directly from the hardware instead.  We have two places where this
occurs, neither of them are performance critical.

Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent 7668fd57

arch/arm/include/asm/cp15.h

+6 −1
Original line number Diff line number Diff line
@@ -42,7 +42,7 @@ 
#ifndef __ASSEMBLY__



#if __LINUX_ARM_ARCH__ >= 4

#define vectors_high()	(cr_alignment & CR_V)

#define vectors_high()	(get_cr() & CR_V)

#else

#define vectors_high()	(0)

#endif
@@ -113,6 +113,11 @@ static inline void set_copro_access(unsigned int val) 
#define cr_no_alignment	UL(0)

#define cr_alignment	UL(0)



static inline unsigned long get_cr(void)

{

	return 0;

}



#endif /* ifdef CONFIG_CPU_CP15 / else */



#endif /* ifndef __ASSEMBLY__ */

arch/arm/kernel/setup.c

+1 −1
Original line number Diff line number Diff line
@@ -590,7 +590,7 @@ static void __init setup_processor(void) 


	pr_info("CPU: %s [%08x] revision %d (ARMv%s), cr=%08lx\n",

		cpu_name, read_cpuid_id(), read_cpuid_id() & 15,

		proc_arch[cpu_architecture()], cr_alignment);

		proc_arch[cpu_architecture()], get_cr());



	snprintf(init_utsname()->machine, __NEW_UTS_LEN + 1, "%s%c",

		 list->arch_name, ENDIANNESS);

arch/arm/mm/alignment.c

+1 −1
Original line number Diff line number Diff line
@@ -91,7 +91,7 @@ core_param(alignment, ai_usermode, int, 0600); 
/* Return true if and only if the ARMv6 unaligned access model is in use. */

static bool cpu_is_v6_unaligned(void)

{

	return cpu_architecture() >= CPU_ARCH_ARMv6 && (cr_alignment & CR_U);

	return cpu_architecture() >= CPU_ARCH_ARMv6 && get_cr() & CR_U;

}



static int safe_usermode(int new_usermode, bool warn)