[PATCH 3/6] powerpc/time: Avoid using get_tbl() and get_tbu() internally

[Christophe Leroy]

get_tbl() is confusing as it returns the content of TBL register
on PPC32 but the concatenation of TBL and TBU on PPC64.

Use mftb() instead.

Do the same with get_tbu() for consistency allthough it's name
is less confusing.

Signed-off-by: Christophe Leroy <christophe.le...@csgroup.eu>
---
 arch/powerpc/include/asm/delay.h | 2 +-
 arch/powerpc/include/asm/time.h  | 8 ++++----
 arch/powerpc/kernel/time.c       | 4 ++--
 3 files changed, 7 insertions(+), 7 deletions(-)

diff --git a/arch/powerpc/include/asm/delay.h b/arch/powerpc/include/asm/delay.h
index 66963f7d3e64..51bb8c1476c7 100644
--- a/arch/powerpc/include/asm/delay.h
+++ b/arch/powerpc/include/asm/delay.h
@@ -54,7 +54,7 @@ extern void udelay(unsigned long usecs);
 ({                                                                             
\
        typeof(condition) __ret;                                               \
        unsigned long __loops = tb_ticks_per_usec * timeout;                   \
-       unsigned long __start = get_tbl();                                     \
+       unsigned long __start = mftb();                                     \
                                                                                
\
        if (delay) {                                                           \
                while (!(__ret = (condition)) &&                               \
diff --git a/arch/powerpc/include/asm/time.h b/arch/powerpc/include/asm/time.h
index b0fb8456305f..3ef0f4b3299e 100644
--- a/arch/powerpc/include/asm/time.h
+++ b/arch/powerpc/include/asm/time.h
@@ -97,9 +97,9 @@ static inline u64 get_tb(void)
        unsigned int tbhi, tblo, tbhi2;
 
        do {
-               tbhi = get_tbu();
-               tblo = get_tbl();
-               tbhi2 = get_tbu();
+               tbhi = mftbu();
+               tblo = mftb();
+               tbhi2 = mftbu();
        } while (tbhi != tbhi2);
 
        return ((u64)tbhi << 32) | tblo;
@@ -153,7 +153,7 @@ static inline unsigned long tb_ticks_since(unsigned long 
tstamp)
                int delta = get_rtcl() - (unsigned int) tstamp;
                return delta < 0 ? delta + 1000000000 : delta;
        }
-       return get_tbl() - tstamp;
+       return mftb() - tstamp;
 }
 
 #define mulhwu(x,y) \
diff --git a/arch/powerpc/kernel/time.c b/arch/powerpc/kernel/time.c
index f85539ebb513..a9cbd5a61585 100644
--- a/arch/powerpc/kernel/time.c
+++ b/arch/powerpc/kernel/time.c
@@ -467,8 +467,8 @@ void __delay(unsigned long loops)
                 */
                spin_cpu_relax();
        } else {
-               start = get_tbl();
-               while (get_tbl() - start < loops)
+               start = mftb();
+               while (mftb() - start < loops)
                        spin_cpu_relax();
        }
        spin_end();
-- 
2.25.0