linux-kernel - [PATCH v1 04/16] powerpc/32: make the 6xx/8xx EXC_XFER

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Message-Id: <6f7163e3c49baceb21ac756dc79828abaf93ecbe.1549630193.git.christophe.leroy@c-s.fr>
Date:   Fri,  8 Feb 2019 12:52:25 +0000 (UTC)
From:   Christophe Leroy <christophe.leroy@....fr>
To:     Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        Nicholas Piggin <npiggin@...il.com>
Cc:     linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org
Subject: [PATCH v1 04/16] powerpc/32: make the 6xx/8xx EXC_XFER_TEMPLATE()
 similar to the 40x/booke one

6xx/8xx EXC_XFER_TEMPLATE() macro adds a i##n symbol which is
unused and can be removed.
40x and booke EXC_XFER_TEMPLATE() macros takes msr from the caller
while the 6xx/8xx version uses only MSR_KERNEL as msr value.

This patch modifies the 6xx/8xx version to make it similar to the
40x and booke versions.

Signed-off-by: Christophe Leroy <christophe.leroy@....fr>
---
 arch/powerpc/kernel/head_32.h | 13 ++++++-------
 1 file changed, 6 insertions(+), 7 deletions(-)

diff --git a/arch/powerpc/kernel/head_32.h b/arch/powerpc/kernel/head_32.h
index cf3d00844597..985758cbf577 100644
--- a/arch/powerpc/kernel/head_32.h
+++ b/arch/powerpc/kernel/head_32.h
@@ -99,13 +99,12 @@
 	addi	r3,r1,STACK_FRAME_OVERHEAD;	\
 	xfer(n, hdlr)
 
-#define EXC_XFER_TEMPLATE(n, hdlr, trap, copyee, tfer, ret)	\
+#define EXC_XFER_TEMPLATE(hdlr, trap, msr, copyee, tfer, ret)	\
 	li	r10,trap;					\
 	stw	r10,_TRAP(r11);					\
-	LOAD_MSR_KERNEL(r10, MSR_KERNEL);			\
+	LOAD_MSR_KERNEL(r10, msr);				\
 	copyee(r10, r9);					\
 	bl	tfer;						\
-i##n:								\
 	.long	hdlr;						\
 	.long	ret
 
@@ -113,19 +112,19 @@ i##n:								\
 #define NOCOPY(d, s)
 
 #define EXC_XFER_STD(n, hdlr)		\
-	EXC_XFER_TEMPLATE(n, hdlr, n, NOCOPY, transfer_to_handler_full,	\
+	EXC_XFER_TEMPLATE(hdlr, n, MSR_KERNEL, NOCOPY, transfer_to_handler_full,	\
 			  ret_from_except_full)
 
 #define EXC_XFER_LITE(n, hdlr)		\
-	EXC_XFER_TEMPLATE(n, hdlr, n+1, NOCOPY, transfer_to_handler, \
+	EXC_XFER_TEMPLATE(hdlr, n+1, MSR_KERNEL, NOCOPY, transfer_to_handler, \
 			  ret_from_except)
 
 #define EXC_XFER_EE(n, hdlr)		\
-	EXC_XFER_TEMPLATE(n, hdlr, n, COPY_EE, transfer_to_handler_full, \
+	EXC_XFER_TEMPLATE(hdlr, n, MSR_KERNEL, COPY_EE, transfer_to_handler_full, \
 			  ret_from_except_full)
 
 #define EXC_XFER_EE_LITE(n, hdlr)	\
-	EXC_XFER_TEMPLATE(n, hdlr, n+1, COPY_EE, transfer_to_handler, \
+	EXC_XFER_TEMPLATE(hdlr, n+1, MSR_KERNEL, COPY_EE, transfer_to_handler, \
 			  ret_from_except)
 
 #endif /* __HEAD_32_H__ */
-- 
2.13.3