[PATCH 1/2] kbuild: Add "Section mismatch" warning whitelist for powerpc

[Li Yang <leoli@freescale.com>]

This patch fixes the following "Section mismatch" warnings when
build powerpc platforms.

-------------
WARNING: arch/powerpc/mm/built-in.o - Section mismatch: reference to .init.text:early_get_page from .text between 'pte_alloc_one_kernel' (at offset 0xc68) and 'pte_alloc_one'
WARNING: mm/built-in.o - Section mismatch: reference to .init.text:set_up_list3s from .text between 'kmem_cache_create' (at offset 0x20300) and 'cache_reap'
-------------

Massive warnings represented by:
-------------
WARNING: arch/powerpc/kernel/built-in.o - Section mismatch: reference to .init.data:.got2 from prom_entry (offset 0x0)
WARNING: arch/powerpc/platforms/built-in.o - Section mismatch: reference to .init.text:mpc8313_rdb_probe from .machine.desc after 'mach_mpc8313_rdb' (at offset 0x4)
-------------

Signed-off-by: Li Yang <leoli@freescale.com>
---
scripts/mod/modpost.c |   16 ++++++++++++----
1 files changed, 12 insertions(+), 4 deletions(-)

diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
index c89cb71..aa3a881 100644
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -649,9 +649,10 @@ static int strrcmp(const char *s, const char *sub)
 *  tosec    = .init.text
 *
 * Pattern 10:
- *  ia64 has machvec table for each platform. It is mixture of function
- *  pointer of .init.text and .text.
- *  fromsec  = .machvec
+ *  ia64 has machvec table and powerpc has machine desc table for each
+ *  platform. It is mixture of function pointer of .init.text and .text.
+ *  fromsec  = .machvec | .machine.desc
+ *
 **/
static int secref_whitelist(const char *modname, const char *tosec,
			    const char *fromsec, const char *atsym,
@@ -681,6 +682,8 @@ static int secref_whitelist(const char *modname, const char *tosec,
	const char *pat4sym[] = {
		"sparse_index_alloc",
		"zone_wait_table_init",
+		"pte_alloc_one_kernel",
+		"kmem_cache_create",
		NULL
	};

@@ -750,7 +753,8 @@ static int secref_whitelist(const char *modname, const char *tosec,
				return 1;

	/* Check for pattern 10 */
-	if (strcmp(fromsec, ".machvec") == 0)
+	if ((strcmp(fromsec, ".machvec") == 0) ||
+	    (strcmp(fromsec, ".machine.desc") == 0))
		return 1;

	return 0;
@@ -883,6 +887,10 @@ static void warn_sec_mismatch(const char *modname, const char *fromsec,
	    secref_whitelist(modname, secname, fromsec,
			     elf->strtab + before->st_name, refsymname))
		return;
+	/* fromsec whitelist - without a valid 'before' */
+	/* powerpc has a GOT table in .got2 section */
+	if (strcmp(fromsec, ".got2") == 0)
+		return;

	if (before && after) {
		warn("%s - Section mismatch: reference to %s:%s from %s "

-
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