lkml.org 
[lkml]   [2007]   [Mar]   [30]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] fix dependency generation
On Thu, Mar 29, 2007 at 10:27:14AM +0100, Jan Beulich wrote:
> 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.
Do you have a test case for this?
I want to play a little with this before I submit it.

>
> Once at it, also eliminate false dependencies due to use of
> ...CONFIG_... identifiers.
But that will break UM - no??
See following note from fixdep:
* Note 2: if somebody writes HELLO_CONFIG_BOOM in a file, it will depend onto
* CONFIG_BOOM. This could seem a bug (not too hard to fix), but please do not
* fix it! Some UserModeLinux files (look at arch/um/) call CONFIG_BOOM as
* UML_CONFIG_BOOM, to avoid conflicts with /usr/include/linux/autoconf.h,
* through arch/um/include/uml-config.h; this fixdep "bug" makes sure that
* those files will have correct dependencies.

Sam

>
> Signed-off-by: Jan Beulich <jbeulich@novell.com>
>
> --- linux-2.6.21-rc5/scripts/basic/fixdep.c 2007-02-04 19:44:54.000000000 +0100
> +++ 2.6.21-rc5-fixdep-mod/scripts/basic/fixdep.c 2007-03-29 11:11:10.000000000 +0200
> @@ -29,8 +29,7 @@
> * 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.
> + * e.g. include/config/his/driver.h, consiting of empty files.
> *
> * 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,
> @@ -223,7 +222,7 @@ void use_config(char *m, int slen)
> void parse_config_file(char *map, size_t len)
> {
> int *end = (int *) (map + len);
> - /* start at +1, so that p can never be < map */
> + /* start at +1, so that p can never be <= map */
> int *m = (int *) map + 1;
> char *p, *q;
>
> @@ -235,6 +234,8 @@ void parse_config_file(char *map, size_t
> continue;
> conf:
> if (p > map + len - 7)
> + break;
> + if (isalnum(p[-1]) || p[-1] == '_')
> continue;
> if (memcmp(p, "CONFIG_", 7))
> continue;
> @@ -245,6 +246,8 @@ 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);
> }
> }
>
>
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2007-03-30 17:11    [from the cache]
©2003-2011 Jasper Spaans