linux-kernel - [PATCH nolibc 13/61] tools/nolibc/types: move makedev to types.h and make it a macro

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Date:   Mon, 18 Apr 2022 17:41:37 -0700
From:   "Paul E. McKenney" <paulmck@...nel.org>
To:     linux-kernel@...r.kernel.org
Cc:     gwml@...r.gnuweeb.org, kernel-team@...com, w@....eu,
        Willy Tarreau <w@....eu>,
        "Paul E . McKenney" <paulmck@...nel.org>
Subject: [PATCH nolibc 13/61] tools/nolibc/types: move makedev to types.h and make it a macro

From: Willy Tarreau <w@....eu>

The makedev() man page says it's supposed to be a macro and that some
OSes have it with the other ones in sys/types.h so it now makes sense
to move it to types.h as a macro. Let's also define major() and
minor() that perform the reverse operation.

Signed-off-by: Willy Tarreau <w@....eu>
Signed-off-by: Paul E. McKenney <paulmck@...nel.org>
---
 tools/include/nolibc/nolibc.h | 9 ---------
 tools/include/nolibc/types.h  | 5 +++++
 2 files changed, 5 insertions(+), 9 deletions(-)

diff --git a/tools/include/nolibc/nolibc.h b/tools/include/nolibc/nolibc.h
index 2267d98337ea..23fb81414b1b 100644
--- a/tools/include/nolibc/nolibc.h
+++ b/tools/include/nolibc/nolibc.h
@@ -116,13 +116,4 @@ const char *ltoa(long in)
 	return pos + 1;
 }
 
-/* Here come a few helper functions */
-
-/* WARNING, it only deals with the 4096 first majors and 256 first minors */
-static __attribute__((unused))
-dev_t makedev(unsigned int major, unsigned int minor)
-{
-	return ((major & 0xfff) << 8) | (minor & 0xff);
-}
-
 #endif /* _NOLIBC_H */
diff --git a/tools/include/nolibc/types.h b/tools/include/nolibc/types.h
index 563dbbad0496..b1bff5e717b6 100644
--- a/tools/include/nolibc/types.h
+++ b/tools/include/nolibc/types.h
@@ -162,4 +162,9 @@ struct stat {
 	time_t    st_ctime;   /* time of last status change */
 };
 
+/* WARNING, it only deals with the 4096 first majors and 256 first minors */
+#define makedev(major, minor) ((dev_t)((((major) & 0xfff) << 8) | ((minor) & 0xff)))
+#define major(dev) ((unsigned int)(((dev) >> 8) & 0xfff))
+#define minor(dev) ((unsigned int)(((dev) & 0xff))
+
 #endif /* _NOLIBC_TYPES_H */
-- 
2.31.1.189.g2e36527f23