The patch titled
kbuild: fix dependency generation
has been added to the -mm tree. Its filename is
kbuild-fix-dependency-generation.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: kbuild: fix dependency generation
From: Jan Beulich <jbeulich@xxxxxxxxxx>
Commit 2e3646e51b2d6415549b310655df63e7e0d7a080 changed the way
the split config tree is built, but failed to also adjust fixdep
accordingly - if changing a config option from or to m, files
referencing the respective CONFIG_..._MODULE (but not the
corresponding CONFIG_...) didn't get rebuilt.
The problem is that trisate symbol are represent with three
SYMBOL=n => no symbol defined
SYMBOL=y => CONFIG_SYMBOL defined to '1'
SYMBOL=m => CONFIG_SYMBOL_MODULE defined to '1'
But conf_split_config do not distingush between the =y and =m case,
so only the =y case is honoured.
This is fixed in fixdep so when a CONFIG symbol with
_MODULE is found we skip that part and only look
for the CONFIG_SYMBOL version.
Signed-off-by: Jan Beulich <jbeulich@xxxxxxxxxx>
Signed-off-by: Sam Ravnborg <sam@xxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
scripts/basic/fixdep.c | 10 +++++++---
1 file changed, 7 insertions(+), 3 deletions(-)
diff -puN scripts/basic/fixdep.c~kbuild-fix-dependency-generation scripts/basic/fixdep.c
--- a/scripts/basic/fixdep.c~kbuild-fix-dependency-generation
+++ a/scripts/basic/fixdep.c
@@ -28,9 +28,11 @@
* the dependency on linux/autoconf.h by a dependency on every config
* option which is mentioned in any of the listed prequisites.
*
- * To be exact, split-include populates a tree in include/config/,
- * e.g. include/config/his/driver.h, which contains the #define/#undef
- * for the CONFIG_HIS_DRIVER option.
+ * kconfig populates a tree in include/config/ with an empty file
+ * for each config symbol and when the configuration is updated
+ * the files representing changed config options are touched
+ * which then let make pick up the changes and the files that use
+ * the config symbols are rebuilt.
*
* So if the user changes his CONFIG_HIS_DRIVER option, only the objects
* which depend on "include/linux/config/his/driver.h" will be rebuilt,
@@ -245,6 +247,8 @@ void parse_config_file(char *map, size_t
continue;
found:
+ if (!memcmp(q - 7, "_MODULE", 7))
+ q -= 7;
use_config(p+7, q-p-7);
}
}
_
Patches currently in -mm which might be from jbeulich@xxxxxxxxxx are
remove-pci_dac_dma_-apis.patch
kbuild-fix-dependency-generation.patch
use-stop_machine_run-in-the-intel-rng-driver.patch
-
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