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authorSam Ravnborg <sam@ravnborg.org>2007-05-17 20:14:48 +0200
committerSam Ravnborg <sam@ravnborg.org>2007-05-19 09:11:58 +0200
commit0e0d314e6a01bb14d303e35e6f7ba24b17020044 (patch)
tree596929a373bbbba7c2d7af4ae6e485a4c584b76f /scripts/mod
parentca967258b69eb65dcb07bbab90fdf964c6d2ec45 (diff)
kbuild: introduce __init_refok/__initdata_refok to supress section mismatch warnings
Throughout the kernel there are a few legitimite references to init or exit sections. Most of these are covered by the patterns included in modpost but a few nees special attention. To avoid hardcoding a lot of function names in modpost introduce a marker so relevant function/data can be marked. When modpost see a reference to a init/exit function from a function/data marked no warning will be issued. Idea from: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Cc: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'scripts/mod')
-rw-r--r--scripts/mod/modpost.c11
1 files changed, 11 insertions, 0 deletions
diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
index 2909391a8035..7c87267b6ff0 100644
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -583,6 +583,12 @@ static int strrcmp(const char *s, const char *sub)
/**
* Whitelist to allow certain references to pass with no warning.
+ *
+ * Pattern 0:
+ * Do not warn if funtion/data are marked with __init_refok/__initdata_refok.
+ * The pattern is identified by:
+ * fromsec = .text.init.refok | .data.init.refok
+ *
* Pattern 1:
* If a module parameter is declared __initdata and permissions=0
* then this is legal despite the warning generated.
@@ -686,6 +692,11 @@ static int secref_whitelist(const char *modname, const char *tosec,
NULL
};
+ /* Check for pattern 0 */
+ if ((strcmp(fromsec, ".text.init.refok") == 0) ||
+ (strcmp(fromsec, ".data.init.refok") == 0))
+ return 1;
+
/* Check for pattern 1 */
if (strcmp(tosec, ".init.data") != 0)
f1 = 0;