linux-kernel - [PATCH v4 02/10] tools/nolibc: unistd.h: apply _

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Message-Id: <2d88e5573cfd5761757d4f9ebb528d62e9e29377.1687187451.git.falcon@tinylab.org>
Date:   Mon, 19 Jun 2023 23:42:26 +0800
From:   Zhangjin Wu <falcon@...ylab.org>
To:     w@....eu
Cc:     david.laight@...lab.com, arnd@...db.de, falcon@...ylab.org,
        linux-kernel@...r.kernel.org, linux-kselftest@...r.kernel.org,
        linux-riscv@...ts.infradead.org, thomas@...ch.de,
        Thomas Weißschuh <linux@...ssschuh.net>
Subject: [PATCH v4 02/10] tools/nolibc: unistd.h: apply __sysret() helper

Use __sysret() to shrink the whole _syscall() to oneline code.

Reviewed-by: Thomas Weißschuh <linux@...ssschuh.net>
Signed-off-by: Zhangjin Wu <falcon@...ylab.org>
---
 tools/include/nolibc/unistd.h | 11 +----------
 1 file changed, 1 insertion(+), 10 deletions(-)

diff --git a/tools/include/nolibc/unistd.h b/tools/include/nolibc/unistd.h
index 0e832e10a0b2..fabc846f797b 100644
--- a/tools/include/nolibc/unistd.h
+++ b/tools/include/nolibc/unistd.h
@@ -56,16 +56,7 @@ int tcsetpgrp(int fd, pid_t pid)
 	return ioctl(fd, TIOCSPGRP, &pid);
 }
 
-#define _syscall(N, ...)                                                      \
-({                                                                            \
-	long _ret = my_syscall##N(__VA_ARGS__);                               \
-	if (_ret < 0) {                                                       \
-		SET_ERRNO(-_ret);                                             \
-		_ret = -1;                                                    \
-	}                                                                     \
-	_ret;                                                                 \
-})
-
+#define _syscall(N, ...) __sysret(my_syscall##N(__VA_ARGS__))
 #define _syscall_narg(...) __syscall_narg(__VA_ARGS__, 6, 5, 4, 3, 2, 1, 0)
 #define __syscall_narg(_0, _1, _2, _3, _4, _5, _6, N, ...) N
 #define _syscall_n(N, ...) _syscall(N, __VA_ARGS__)
-- 
2.25.1