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powerpc: Remove mfvtb()

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This function is only used by get_vtb(). They are almost the same except
the reading from the real register. Move the mfspr() to get_vtb() and
kill the function mfvtb(). With this, we can eliminate the use of
cpu_has_feature() in very core header file like reg.h. This is a
preparation for the use of jump label for cpu_has_feature().

Signed-off-by: Kevin Hao <haokexin@gmail.com>
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Kevin Hao 2016-07-23 14:42:39 +05:30 committed by Michael Ellerman
parent 309b315b6e
commit 905259e33d
2 changed files with 1 additions and 10 deletions
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9
arch/powerpc/include/asm/reg.h
View File

@ -1256,15 +1256,6 @@ static inline void msr_check_and_clear(unsigned long bits)
__msr_check_and_clear(bits);
}
static inline unsigned long mfvtb (void)
{
#ifdef CONFIG_PPC_BOOK3S_64
if (cpu_has_feature(CPU_FTR_ARCH_207S))
return mfspr(SPRN_VTB);
#endif
return 0;
}
#ifdef __powerpc64__
#if defined(CONFIG_PPC_CELL) || defined(CONFIG_PPC_FSL_BOOK3E)
#define mftb() ({unsigned long rval; \

2
arch/powerpc/include/asm/time.h
View File

@ -103,7 +103,7 @@ static inline u64 get_vtb(void)
{
#ifdef CONFIG_PPC_BOOK3S_64
if (cpu_has_feature(CPU_FTR_ARCH_207S))
return mfvtb();
return mfspr(SPRN_VTB);
#endif
return 0;
}