powerpc/vdso: Remove cvdso_call_time macro

cvdso_call_time macro is very similar to cvdso_call macro.

Add a call_time argument to cvdso_call which is 0 by default
and set to 1 when using cvdso_call to call __c_kernel_time().

Return returned value as is with CR[SO] cleared when it is used
for time().

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/837a260ad86fc1ce297a562c2117fd69be5f7b5c.1642782130.git.christophe.leroy@csgroup.eu

diff --git a/arch/powerpc/include/asm/vdso/gettimeofday.h b/arch/powerpc/include/asm/vdso/gettimeofday.h
index 1faff0b..df00e91 100644 (file)
--- a/arch/powerpc/include/asm/vdso/gettimeofday.h
+++ b/arch/powerpc/include/asm/vdso/gettimeofday.h
@@ -9,12 +9,12 @@
 #include <asm/ppc_asm.h>
 
 /*
- * The macros sets two stack frames, one for the caller and one for the callee
+ * The macro sets two stack frames, one for the caller and one for the callee
  * because there are no requirement for the caller to set a stack frame when
  * calling VDSO so it may have omitted to set one, especially on PPC64
  */
 
-.macro cvdso_call funct
+.macro cvdso_call funct call_time=0
   .cfi_startproc
        PPC_STLU        r1, -PPC_MIN_STKFRM(r1)
        mflr            r0
@@ -25,45 +25,28 @@
        PPC_STL         r2, PPC_MIN_STKFRM + STK_GOT(r1)
 #endif
        get_datapage    r5
+       .ifeq   \call_time
        addi            r5, r5, VDSO_DATA_OFFSET
+       .else
+       addi            r4, r5, VDSO_DATA_OFFSET
+       .endif
        bl              DOTSYM(\funct)
        PPC_LL          r0, PPC_MIN_STKFRM + PPC_LR_STKOFF(r1)
 #ifdef __powerpc64__
        PPC_LL          r2, PPC_MIN_STKFRM + STK_GOT(r1)
 #endif
+       .ifeq   \call_time
        cmpwi           r3, 0
+       .endif
        mtlr            r0
   .cfi_restore lr
        addi            r1, r1, 2 * PPC_MIN_STKFRM
        crclr           so
+       .ifeq   \call_time
        beqlr+
        crset           so
        neg             r3, r3
-       blr
-  .cfi_endproc
-.endm
-
-.macro cvdso_call_time funct
-  .cfi_startproc
-       PPC_STLU        r1, -PPC_MIN_STKFRM(r1)
-       mflr            r0
-  .cfi_register lr, r0
-       PPC_STLU        r1, -PPC_MIN_STKFRM(r1)
-       PPC_STL         r0, PPC_MIN_STKFRM + PPC_LR_STKOFF(r1)
-#ifdef __powerpc64__
-       PPC_STL         r2, PPC_MIN_STKFRM + STK_GOT(r1)
-#endif
-       get_datapage    r4
-       addi            r4, r4, VDSO_DATA_OFFSET
-       bl              DOTSYM(\funct)
-       PPC_LL          r0, PPC_MIN_STKFRM + PPC_LR_STKOFF(r1)
-#ifdef __powerpc64__
-       PPC_LL          r2, PPC_MIN_STKFRM + STK_GOT(r1)
-#endif
-       crclr           so
-       mtlr            r0
-  .cfi_restore lr
-       addi            r1, r1, 2 * PPC_MIN_STKFRM
+       .endif
        blr
   .cfi_endproc
 .endm

diff --git a/arch/powerpc/kernel/vdso/gettimeofday.S b/arch/powerpc/kernel/vdso/gettimeofday.S
index c875312..397f290 100644 (file)
--- a/arch/powerpc/kernel/vdso/gettimeofday.S
+++ b/arch/powerpc/kernel/vdso/gettimeofday.S
@@ -65,7 +65,7 @@ V_FUNCTION_END(__kernel_clock_getres)
  *
  */
 V_FUNCTION_BEGIN(__kernel_time)
-       cvdso_call_time __c_kernel_time
+       cvdso_call __c_kernel_time call_time=1
 V_FUNCTION_END(__kernel_time)
 
 /* Routines for restoring integer registers, called by the compiler.  */