powerpc/kernel: Rename PACA_DSCR to PACA_DSCR_DEFAULT

PACA_DSCR offset macro tracks dscr_default element in the paca
structure. Better change the name of this macro to match that of the
data element it tracks. Makes the code more readable.
Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

arch/powerpc/kernel/asm-offsets.c

@@ -247,7 +247,7 @@ int main(void)
 #endif
 	DEFINE(PACAHWCPUID, offsetof(struct paca_struct, hw_cpu_id));
 	DEFINE(PACAKEXECSTATE, offsetof(struct paca_struct, kexec_state));
-	DEFINE(PACA_DSCR, offsetof(struct paca_struct, dscr_default));
+	DEFINE(PACA_DSCR_DEFAULT, offsetof(struct paca_struct, dscr_default));
 	DEFINE(PACA_STARTTIME, offsetof(struct paca_struct, starttime));
 	DEFINE(PACA_STARTTIME_USER, offsetof(struct paca_struct, starttime_user));
 	DEFINE(PACA_USER_TIME, offsetof(struct paca_struct, user_time));

arch/powerpc/kernel/entry_64.S

@@ -556,7 +556,7 @@ BEGIN_FTR_SECTION
 	ld	r0,THREAD_DSCR(r4)
 	cmpwi	r6,0
 	bne	1f
-	ld	r0,PACA_DSCR(r13)
+	ld	r0,PACA_DSCR_DEFAULT(r13)
 1:
 BEGIN_FTR_SECTION_NESTED(70)
 	mfspr	r8, SPRN_FSCR

arch/powerpc/kernel/tm.S

@@ -293,7 +293,7 @@ dont_backup_fp:
 	ld	r2, STK_GOT(r1)
 
 	/* Load CPU's default DSCR */
-	ld	r0, PACA_DSCR(r13)
+	ld	r0, PACA_DSCR_DEFAULT(r13)
 	mtspr	SPRN_DSCR, r0
 
 	blr
@@ -473,7 +473,7 @@ restore_gprs:
 	ld	r2, STK_GOT(r1)
 
 	/* Load CPU's default DSCR */
-	ld	r0, PACA_DSCR(r13)
+	ld	r0, PACA_DSCR_DEFAULT(r13)
 	mtspr	SPRN_DSCR, r0
 
 	blr

arch/powerpc/kvm/book3s_hv_rmhandlers.S

@@ -324,7 +324,7 @@ kvm_start_guest:
 kvm_secondary_got_guest:
 
 	/* Set HSTATE_DSCR(r13) to something sensible */
-	ld	r6, PACA_DSCR(r13)
+	ld	r6, PACA_DSCR_DEFAULT(r13)
 	std	r6, HSTATE_DSCR(r13)
 
 	/* Order load of vcore, ptid etc. after load of vcpu */