kbuild: silence section mismatch warnings for exported functions

[Sam Ravnborg]

There are legitime cases of exported functions which
is marked __init. Some examples are in drivers/pci/
where the pci subsystem export symbols to be used by other
__init functions.
So ignore references from ksymtab* to .init.text

Signed-off-by: Sam Ravnborg <sam@xxxxxxxxxxxx>
---
 scripts/mod/modpost.c |   11 +++++++++++
 1 files changed, 11 insertions(+), 0 deletions(-)

diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
index 9042039..9e80dc5 100644
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -625,6 +625,13 @@ static int strrcmp(const char *s, const char *sub)
  *  tosec      = .init.data
  *  fromsec    = .text*
  *  refsymname = logo_
+ *
+ * Pattern 8:
+ *  Symbols exported may be marked __init because we need to
+ *  export functions that are only used by init function.
+ *  The pattern is:
+ *  tosec    = .init.text
+ *  fromsec  = __ksymtab*
  **/
 static int secref_whitelist(const char *modname, const char *tosec,
 			    const char *fromsec, const char *atsym,
@@ -702,6 +709,10 @@ static int secref_whitelist(const char *modname, const char *tosec,
 	    (strncmp(fromsec, ".text", strlen(".text")) == 0) &&
 	    (strncmp(refsymname, "logo_", strlen("logo_")) == 0))
 		return 1;
+	/* Check for pattern 8 */
+	if ((strcmp(tosec, ".init.text") == 0) &&
+	    (strncmp(fromsec, "__ksymtab", strlen("__ksymtab")) == 0))
+		return 1;
 	return 0;
 }
 
-- 
1.4.4.2

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