kbuild: do not warn when unwind sections references .init/.exit sections

Andrew Morton reported a number of false positives for ia64 - like these:
WARNING: drivers/acpi/button.o - Section mismatch: reference to .init.text: from .IA_64.unwind.init.text after '' (at offset 0x0)
WARNING: drivers/acpi/button.o - Section mismatch: reference to .exit.text: from .IA_64.unwind.exit.text after '' (at offset 0x0)
WARNING: drivers/acpi/processor.o - Section mismatch: reference to .init.text: from .IA_64.unwind after '' (at offset 0x1e8)

They are all false positives - or at least the .c code looks OK.
It is not known why sometimes a section name is appended and sometimes not.

Fix is to accept references from all sections that includes "unwind." in the name.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>

scripts/mod/modpost.c

@@ -671,13 +671,21 @@ static int init_section_ref_ok(const char *name)
 		".debug",
 		NULL
 	};
-	
+	/* part of section name */
+	const char *namelist3 [] = {
+		".unwind",  /* sample: IA_64.unwind.init.text */
+		NULL
+	};
+
 	for (s = namelist1; *s; s++)
 		if (strcmp(*s, name) == 0)
 			return 1;
 	for (s = namelist2; *s; s++)	
 		if (strncmp(*s, name, strlen(*s)) == 0)
 			return 1;
+	for (s = namelist3; *s; s++)	
+		if (strstr(*s, name) != NULL)
+			return 1;
 	return 0;
 }
 
@@ -727,6 +735,11 @@ static int exit_section_ref_ok(const char *name)
 		".debug",
 		NULL
 	};
+	/* part of section name */
+	const char *namelist3 [] = {
+		".unwind",  /* Sample: IA_64.unwind.exit.text */
+		NULL
+	};
 	
 	for (s = namelist1; *s; s++)
 		if (strcmp(*s, name) == 0)
@@ -734,6 +747,9 @@ static int exit_section_ref_ok(const char *name)
 	for (s = namelist2; *s; s++)	
 		if (strncmp(*s, name, strlen(*s)) == 0)
 			return 1;
+	for (s = namelist3; *s; s++)	
+		if (strstr(*s, name) != NULL)
+			return 1;
 	return 0;
 }