linux-kernel - [tip: x86/core] x86/checksum

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Date:   Mon, 13 Dec 2021 09:50:13 -0000
From:   "tip-bot2 for Peter Zijlstra" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     "Peter Zijlstra (Intel)" <peterz@...radead.org>,
        Josh Poimboeuf <jpoimboe@...hat.com>, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: [tip: x86/core] x86/checksum_32: Remove .fixup usage

The following commit has been merged into the x86/core branch of tip:

Commit-ID:     fedb24cda1ca5407e1965b261e349ea85d6c03dc
Gitweb:        https://git.kernel.org/tip/fedb24cda1ca5407e1965b261e349ea85d6c03dc
Author:        Peter Zijlstra <peterz@...radead.org>
AuthorDate:    Wed, 10 Nov 2021 11:01:19 +01:00
Committer:     Peter Zijlstra <peterz@...radead.org>
CommitterDate: Sat, 11 Dec 2021 09:09:49 +01:00

x86/checksum_32: Remove .fixup usage

Simply add EX_FLAG_CLEAR_AX to do as the .fixup used to do.

Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Reviewed-by: Josh Poimboeuf <jpoimboe@...hat.com>
Link: https://lore.kernel.org/r/20211110101325.899657959@infradead.org
---
 arch/x86/lib/checksum_32.S | 19 +++----------------
 1 file changed, 3 insertions(+), 16 deletions(-)

diff --git a/arch/x86/lib/checksum_32.S b/arch/x86/lib/checksum_32.S
index 929ad17..23318c3 100644
--- a/arch/x86/lib/checksum_32.S
+++ b/arch/x86/lib/checksum_32.S
@@ -260,9 +260,9 @@ unsigned int csum_partial_copy_generic (const char *src, char *dst,
  * Copy from ds while checksumming, otherwise like csum_partial
  */
 
-#define EXC(y...)			\
-	9999: y;			\
-	_ASM_EXTABLE_UA(9999b, 6001f)
+#define EXC(y...)						\
+	9999: y;						\
+	_ASM_EXTABLE_TYPE(9999b, 7f, EX_TYPE_UACCESS | EX_FLAG_CLEAR_AX)
 
 #ifndef CONFIG_X86_USE_PPRO_CHECKSUM
 
@@ -358,15 +358,6 @@ EXC(	movb %cl, (%edi)	)
 	adcl $0, %eax
 7:
 
-# Exception handler:
-.section .fixup, "ax"							
-
-6001:
-	xorl %eax, %eax
-	jmp 7b
-
-.previous
-
 	popl %ebx
 	popl %esi
 	popl %edi
@@ -439,10 +430,6 @@ EXC(	movb %dl, (%edi)         )
 6:	addl %edx, %eax
 	adcl $0, %eax
 7:
-.section .fixup, "ax"
-6001:	xorl %eax, %eax
-	jmp  7b			
-.previous				
 
 	popl %esi
 	popl %edi