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D48893.diff
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diff --git a/share/man/man9/cdefs.9 b/share/man/man9/cdefs.9
--- a/share/man/man9/cdefs.9
+++ b/share/man/man9/cdefs.9
@@ -3,7 +3,7 @@
.\"
.\" SPDX-License-Identifier: BSD-2-Clause
.\"
-.Dd July 20, 2024
+.Dd February 1, 2025
.Dt CDEFS 9
.Os
.Sh NAME
@@ -80,7 +80,7 @@
linkage.
.El
.Ss Function, Structure and Variable Modifiers
-.Bl -column "---------------"
+.Bl -column "----------------"
.It Sy Macro Ta Sy Description
.It Sy __weak_symbol Ta Declare the symbol to be a weak symbol
.It Sy __dead2 Ta Function will not return
@@ -91,6 +91,7 @@
.It Sy __deprecated Ta Function interface has been deprecated, and clients
should migrate to a new interface.
A warning will be issued for clients of this interface.
+.It Sy __deprecated_msg(m) Ta Same as __deprecated but include a message Fa m Ta to aid migration to new interfaces.
.It Sy __packed Ta \&Do not have space between structure elements for natural alignment.
Used when communicating with external protocols.
.It Sy __aligned(x) Ta Specify in bytes the minimum alignment for the specified field, structure or variable
diff --git a/sys/sys/cdefs.h b/sys/sys/cdefs.h
--- a/sys/sys/cdefs.h
+++ b/sys/sys/cdefs.h
@@ -155,6 +155,7 @@
#define __unused __attribute__((__unused__))
#define __used __attribute__((__used__))
#define __deprecated __attribute__((__deprecated__))
+#define __deprecated_msg(m) __attribute__((__deprecated__(m)))
#define __packed __attribute__((__packed__))
#define __aligned(x) __attribute__((__aligned__(x)))
#define __section(x) __attribute__((__section__(x)))
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