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authorMasahiro Yamada <yamada.masahiro@socionext.com>2018-11-21 00:04:18 +0900
committerMasahiro Yamada <yamada.masahiro@socionext.com>2018-12-01 22:21:56 +0900
commit0126be38d98815d25d9ec4573541ed4315bf6a88 (patch)
treeb790b96624f57ca8ab81469181b191c95b64cde0 /Documentation/kbuild
parent0987abcbeea4c87aef80a6138efc13ed0798fcf2 (diff)
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kbuild: announce removal of SUBDIRS if used
SUBDIRS has been kept as a backward compatibility since commit ("[PATCH] kbuild: external module support") in 2002. We do not need multiple ways to do the same thing, so I will remove SUBDIRS after the Linux 5.3 release. I cleaned up in-tree code, and updated the document so that nobody would try to use it. Meanwhile, display the following warning if SUBDIRS is used. Makefile:189: ================= WARNING ================ Makefile:190: 'SUBDIRS' will be removed after Linux 5.3 Makefile:191: Please use 'M=' or 'KBUILD_EXTMOD' instead Makefile:192: ========================================== Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Acked-by: Boris Brezillon <boris.brezillon@bootlin.com> # for scx200_docflash.c Acked-by: Guenter Roeck <linux@roeck-us.net> # for scx200_wdt.c
Diffstat (limited to 'Documentation/kbuild')
-rw-r--r--Documentation/kbuild/kbuild.txt7
1 files changed, 1 insertions, 6 deletions
diff --git a/Documentation/kbuild/kbuild.txt b/Documentation/kbuild/kbuild.txt
index 8390c360d4b3..c9e3d93e7a89 100644
--- a/Documentation/kbuild/kbuild.txt
+++ b/Documentation/kbuild/kbuild.txt
@@ -81,12 +81,7 @@ KBUILD_EXTMOD
--------------------------------------------------
Set the directory to look for the kernel source when building external
modules.
-The directory can be specified in several ways:
-1) Use "M=..." on the command line
-2) Environment variable KBUILD_EXTMOD
-3) Environment variable SUBDIRS
-The possibilities are listed in the order they take precedence.
-Using "M=..." will always override the others.
+Setting "M=..." takes precedence over KBUILD_EXTMOD.
KBUILD_OUTPUT
--------------------------------------------------