powerpc/64e: Get esr offset with _ESR macro

Use _ESR to get the offset of esr register in pr_regs for 64e cpus.
Signed-off-by: Xiongwei Song <sxwjean@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20210807010239.416055-3-sxwjean@me.com

arch/powerpc/kernel/asm-offsets.c

@@ -287,6 +287,7 @@ int main(void)
 	STACK_PT_REGS_OFFSET(_XER, xer);
 	STACK_PT_REGS_OFFSET(_DAR, dar);
 	STACK_PT_REGS_OFFSET(_DSISR, dsisr);
+	STACK_PT_REGS_OFFSET(_ESR, esr);
 	STACK_PT_REGS_OFFSET(ORIG_GPR3, orig_gpr3);
 	STACK_PT_REGS_OFFSET(RESULT, result);
 	STACK_PT_REGS_OFFSET(_TRAP, trap);
@@ -298,7 +299,6 @@ int main(void)
 	 * we use them to hold SRR0 and SRR1.
 	 */
 	STACK_PT_REGS_OFFSET(_DEAR, dar);
-	STACK_PT_REGS_OFFSET(_ESR, dsisr);
 #else /* CONFIG_PPC64 */
 	STACK_PT_REGS_OFFSET(SOFTE, softe);
 	STACK_PT_REGS_OFFSET(_PPR, ppr);

arch/powerpc/kernel/exceptions-64e.S

@@ -546,7 +546,7 @@ __end_interrupts:
 	mfspr	r14,SPRN_DEAR
 	mfspr	r15,SPRN_ESR
 	std	r14,_DAR(r1)
-	std	r15,_DSISR(r1)
+	std	r15,_ESR(r1)
 	ld	r14,PACA_EXGEN+EX_R14(r13)
 	ld	r15,PACA_EXGEN+EX_R15(r13)
 	EXCEPTION_COMMON(0x300)
@@ -559,7 +559,7 @@ __end_interrupts:
 	li	r15,0
 	mr	r14,r10
 	std	r14,_DAR(r1)
-	std	r15,_DSISR(r1)
+	std	r15,_ESR(r1)
 	ld	r14,PACA_EXGEN+EX_R14(r13)
 	ld	r15,PACA_EXGEN+EX_R15(r13)
 	EXCEPTION_COMMON(0x400)
@@ -576,7 +576,7 @@ __end_interrupts:
 	mfspr	r14,SPRN_DEAR
 	mfspr	r15,SPRN_ESR
 	std	r14,_DAR(r1)
-	std	r15,_DSISR(r1)
+	std	r15,_ESR(r1)
 	ld	r14,PACA_EXGEN+EX_R14(r13)
 	ld	r15,PACA_EXGEN+EX_R15(r13)
 	EXCEPTION_COMMON(0x600)
@@ -587,7 +587,7 @@ __end_interrupts:
 	NORMAL_EXCEPTION_PROLOG(0x700, BOOKE_INTERRUPT_PROGRAM,
 				PROLOG_ADDITION_1REG)
 	mfspr	r14,SPRN_ESR
-	std	r14,_DSISR(r1)
+	std	r14,_ESR(r1)
 	ld	r14,PACA_EXGEN+EX_R14(r13)
 	EXCEPTION_COMMON(0x700)
 	addi	r3,r1,STACK_FRAME_OVERHEAD
@@ -1058,7 +1058,7 @@ bad_stack_book3e:
 	mfspr	r10,SPRN_DEAR
 	mfspr	r11,SPRN_ESR
 	std	r10,_DAR(r1)
-	std	r11,_DSISR(r1)
+	std	r11,_ESR(r1)
 	std	r0,GPR0(r1);		/* save r0 in stackframe */	    \
 	std	r2,GPR2(r1);		/* save r2 in stackframe */	    \
 	SAVE_4GPRS(3, r1);		/* save r3 - r6 in stackframe */    \