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-rw-r--r--scripts/mod/modpost.c26
1 files changed, 24 insertions, 2 deletions
diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
index 82e019bf2dc5..2aa47623f5f8 100644
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -582,9 +582,19 @@ static int strrcmp(const char *s, const char *sub)
* tosec = .init.text | .exit.text | .init.data
* fromsec = .data
* atsym = *driver, *_template, *_sht, *_ops, *_probe, *probe_one
+ *
+ * Pattern 3:
+ * Some symbols belong to init section but still it is ok to reference
+ * these from non-init sections as these symbols don't have any memory
+ * allocated for them and symbol address and value are same. So even
+ * if init section is freed, its ok to reference those symbols.
+ * For ex. symbols marking the init section boundaries.
+ * This pattern is identified by
+ * refsymname = __init_begin, _sinittext, _einittext
**/
static int secref_whitelist(const char *modname, const char *tosec,
- const char *fromsec, const char *atsym)
+ const char *fromsec, const char *atsym,
+ const char *refsymname)
{
int f1 = 1, f2 = 1;
const char **s;
@@ -599,6 +609,13 @@ static int secref_whitelist(const char *modname, const char *tosec,
NULL
};
+ const char *pat3refsym[] = {
+ "__init_begin",
+ "_sinittext",
+ "_einittext",
+ NULL
+ };
+
/* Check for pattern 1 */
if (strcmp(tosec, ".init.data") != 0)
f1 = 0;
@@ -629,6 +646,11 @@ static int secref_whitelist(const char *modname, const char *tosec,
if ((strcmp(fromsec, ".pci_fixup") == 0) &&
(strcmp(tosec, ".init.text") == 0))
return 1;
+
+ /* Check for pattern 3 */
+ for (s = pat3refsym; *s; s++)
+ if (strcmp(refsymname, *s) == 0)
+ return 1;
}
return 0;
}
@@ -738,7 +760,7 @@ static void warn_sec_mismatch(const char *modname, const char *fromsec,
/* check whitelist - we may ignore it */
if (before &&
secref_whitelist(modname, secname, fromsec,
- elf->strtab + before->st_name))
+ elf->strtab + before->st_name, refsymname))
return;
if (before && after) {