linux-kernel - [PATCH v3 07/29] x86: bpf

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Message-Id: <20170421141305.25180-7-jslaby@suse.cz>
Date:   Fri, 21 Apr 2017 16:12:43 +0200
From:   Jiri Slaby <jslaby@...e.cz>
To:     mingo@...hat.com
Cc:     tglx@...utronix.de, hpa@...or.com, x86@...nel.org,
        jpoimboe@...hat.com, linux-kernel@...r.kernel.org,
        Jiri Slaby <jslaby@...e.cz>,
        "David S. Miller" <davem@...emloft.net>,
        Alexey Kuznetsov <kuznet@....inr.ac.ru>,
        James Morris <jmorris@...ei.org>,
        Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>,
        Patrick McHardy <kaber@...sh.net>, netdev@...r.kernel.org
Subject: [PATCH v3 07/29] x86: bpf_jit, use ENTRY+ENDPROC

Do not use a custom macro FUNC for starts of the global functions, use
ENTRY instead.

And while at it, annotate also ends of the functions by ENDPROC.

Signed-off-by: Jiri Slaby <jslaby@...e.cz>
Cc: "David S. Miller" <davem@...emloft.net>
Cc: Alexey Kuznetsov <kuznet@....inr.ac.ru>
Cc: James Morris <jmorris@...ei.org>
Cc: Hideaki YOSHIFUJI <yoshfuji@...ux-ipv6.org>
Cc: Patrick McHardy <kaber@...sh.net>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Ingo Molnar <mingo@...hat.com>
Cc: "H. Peter Anvin" <hpa@...or.com>
Cc: x86@...nel.org
Cc: netdev@...r.kernel.org
---
 arch/x86/net/bpf_jit.S | 32 ++++++++++++++++++--------------
 1 file changed, 18 insertions(+), 14 deletions(-)

diff --git a/arch/x86/net/bpf_jit.S b/arch/x86/net/bpf_jit.S
index f2a7faf4706e..762c29fb8832 100644
--- a/arch/x86/net/bpf_jit.S
+++ b/arch/x86/net/bpf_jit.S
@@ -23,16 +23,12 @@
 	32 /* space for rbx,r13,r14,r15 */ + \
 	8 /* space for skb_copy_bits */)
 
-#define FUNC(name) \
-	.globl name; \
-	.type name, @function; \
-	name:
-
-FUNC(sk_load_word)
+ENTRY(sk_load_word)
 	test	%esi,%esi
 	js	bpf_slow_path_word_neg
+ENDPROC(sk_load_word)
 
-FUNC(sk_load_word_positive_offset)
+ENTRY(sk_load_word_positive_offset)
 	mov	%r9d,%eax		# hlen
 	sub	%esi,%eax		# hlen - offset
 	cmp	$3,%eax
@@ -40,12 +36,14 @@ FUNC(sk_load_word_positive_offset)
 	mov     (SKBDATA,%rsi),%eax
 	bswap   %eax  			/* ntohl() */
 	ret
+ENDPROC(sk_load_word_positive_offset)
 
-FUNC(sk_load_half)
+ENTRY(sk_load_half)
 	test	%esi,%esi
 	js	bpf_slow_path_half_neg
+ENDPROC(sk_load_half)
 
-FUNC(sk_load_half_positive_offset)
+ENTRY(sk_load_half_positive_offset)
 	mov	%r9d,%eax
 	sub	%esi,%eax		#	hlen - offset
 	cmp	$1,%eax
@@ -53,16 +51,19 @@ FUNC(sk_load_half_positive_offset)
 	movzwl	(SKBDATA,%rsi),%eax
 	rol	$8,%ax			# ntohs()
 	ret
+ENDPROC(sk_load_half_positive_offset)
 
-FUNC(sk_load_byte)
+ENTRY(sk_load_byte)
 	test	%esi,%esi
 	js	bpf_slow_path_byte_neg
+ENDPROC(sk_load_byte)
 
-FUNC(sk_load_byte_positive_offset)
+ENTRY(sk_load_byte_positive_offset)
 	cmp	%esi,%r9d   /* if (offset >= hlen) goto bpf_slow_path_byte */
 	jle	bpf_slow_path_byte
 	movzbl	(SKBDATA,%rsi),%eax
 	ret
+ENDPROC(sk_load_byte_positive_offset)
 
 /* rsi contains offset and can be scratched */
 #define bpf_slow_path_common(LEN)		\
@@ -119,31 +120,34 @@ bpf_slow_path_word_neg:
 	cmp	SKF_MAX_NEG_OFF, %esi	/* test range */
 	jl	bpf_error	/* offset lower -> error  */
 
-FUNC(sk_load_word_negative_offset)
+ENTRY(sk_load_word_negative_offset)
 	sk_negative_common(4)
 	mov	(%rax), %eax
 	bswap	%eax
 	ret
+ENDPROC(sk_load_word_negative_offset)
 
 bpf_slow_path_half_neg:
 	cmp	SKF_MAX_NEG_OFF, %esi
 	jl	bpf_error
 
-FUNC(sk_load_half_negative_offset)
+ENTRY(sk_load_half_negative_offset)
 	sk_negative_common(2)
 	mov	(%rax),%ax
 	rol	$8,%ax
 	movzwl	%ax,%eax
 	ret
+ENDPROC(sk_load_half_negative_offset)
 
 bpf_slow_path_byte_neg:
 	cmp	SKF_MAX_NEG_OFF, %esi
 	jl	bpf_error
 
-FUNC(sk_load_byte_negative_offset)
+ENTRY(sk_load_byte_negative_offset)
 	sk_negative_common(1)
 	movzbl	(%rax), %eax
 	ret
+ENDPROC(sk_load_byte_negative_offset)
 
 bpf_error:
 # force a return 0 from jit handler
-- 
2.12.2