netdev - [PATCH] tcp: don't use __constant_cpu_to

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:   Thu, 14 Mar 2019 15:15:14 +0900
From:   Sergey Senozhatsky <sergey.senozhatsky.work@...il.com>
To:     Eric Dumazet <edumazet@...gle.com>
Cc:     netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        Sergey Senozhatsky <sergey.senozhatsky@...il.com>
Subject: [PATCH] tcp: don't use __constant_cpu_to_be32

A trivial patch.

cpu_to_be32() is capable enough to detect __builtin_constant_p()
and to use an appropriate compile time ___constant_swahb32()
function.

So we can use cpu_to_be32() instead of __constant_cpu_to_be32().

Signed-off-by: Sergey Senozhatsky <sergey.senozhatsky@...il.com>
---
 include/uapi/linux/tcp.h | 20 ++++++++++----------
 1 file changed, 10 insertions(+), 10 deletions(-)

diff --git a/include/uapi/linux/tcp.h b/include/uapi/linux/tcp.h
index 8bb6cc5f3235..7d2330df9652 100644
--- a/include/uapi/linux/tcp.h
+++ b/include/uapi/linux/tcp.h
@@ -70,16 +70,16 @@ union tcp_word_hdr {
 #define tcp_flag_word(tp) ( ((union tcp_word_hdr *)(tp))->words [3]) 
 
 enum { 
-	TCP_FLAG_CWR = __constant_cpu_to_be32(0x00800000),
-	TCP_FLAG_ECE = __constant_cpu_to_be32(0x00400000),
-	TCP_FLAG_URG = __constant_cpu_to_be32(0x00200000),
-	TCP_FLAG_ACK = __constant_cpu_to_be32(0x00100000),
-	TCP_FLAG_PSH = __constant_cpu_to_be32(0x00080000),
-	TCP_FLAG_RST = __constant_cpu_to_be32(0x00040000),
-	TCP_FLAG_SYN = __constant_cpu_to_be32(0x00020000),
-	TCP_FLAG_FIN = __constant_cpu_to_be32(0x00010000),
-	TCP_RESERVED_BITS = __constant_cpu_to_be32(0x0F000000),
-	TCP_DATA_OFFSET = __constant_cpu_to_be32(0xF0000000)
+	TCP_FLAG_CWR = cpu_to_be32(0x00800000),
+	TCP_FLAG_ECE = cpu_to_be32(0x00400000),
+	TCP_FLAG_URG = cpu_to_be32(0x00200000),
+	TCP_FLAG_ACK = cpu_to_be32(0x00100000),
+	TCP_FLAG_PSH = cpu_to_be32(0x00080000),
+	TCP_FLAG_RST = cpu_to_be32(0x00040000),
+	TCP_FLAG_SYN = cpu_to_be32(0x00020000),
+	TCP_FLAG_FIN = cpu_to_be32(0x00010000),
+	TCP_RESERVED_BITS = cpu_to_be32(0x0F000000),
+	TCP_DATA_OFFSET = cpu_to_be32(0xF0000000)
 }; 
 
 /*
-- 
2.21.0