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authorDavid S. Miller <davem@davemloft.net>2009-06-15 03:02:23 -0700
committerDavid S. Miller <davem@davemloft.net>2009-06-15 03:02:23 -0700
commit9cbc1cb8cd46ce1f7645b9de249b2ce8460129bb (patch)
tree8d104ec2a459346b99413b0b77421ca7b9936c1a /arch/sparc/mm/extable.c
parentca44d6e60f9de26281fda203f58b570e1748c015 (diff)
parent45e3e1935e2857c54783291107d33323b3ef33c8 (diff)
Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6
Conflicts: Documentation/feature-removal-schedule.txt drivers/scsi/fcoe/fcoe.c net/core/drop_monitor.c net/core/net-traces.c
Diffstat (limited to 'arch/sparc/mm/extable.c')
-rw-r--r--arch/sparc/mm/extable.c29
1 files changed, 29 insertions, 0 deletions
diff --git a/arch/sparc/mm/extable.c b/arch/sparc/mm/extable.c
index 16cc28935e3..a61c349448e 100644
--- a/arch/sparc/mm/extable.c
+++ b/arch/sparc/mm/extable.c
@@ -28,6 +28,10 @@ search_extable(const struct exception_table_entry *start,
* word 3: last insn address + 4 bytes
* word 4: fixup code address
*
+ * Deleted entries are encoded as:
+ * word 1: unused
+ * word 2: -1
+ *
* See asm/uaccess.h for more details.
*/
@@ -39,6 +43,10 @@ search_extable(const struct exception_table_entry *start,
continue;
}
+ /* A deleted entry; see trim_init_extable */
+ if (walk->fixup == -1)
+ continue;
+
if (walk->insn == value)
return walk;
}
@@ -57,6 +65,27 @@ search_extable(const struct exception_table_entry *start,
return NULL;
}
+#ifdef CONFIG_MODULES
+/* We could memmove them around; easier to mark the trimmed ones. */
+void trim_init_extable(struct module *m)
+{
+ unsigned int i;
+ bool range;
+
+ for (i = 0; i < m->num_exentries; i += range ? 2 : 1) {
+ range = m->extable[i].fixup == 0;
+
+ if (within_module_init(m->extable[i].insn, m)) {
+ m->extable[i].fixup = -1;
+ if (range)
+ m->extable[i+1].fixup = -1;
+ }
+ if (range)
+ i++;
+ }
+}
+#endif /* CONFIG_MODULES */
+
/* Special extable search, which handles ranges. Returns fixup */
unsigned long search_extables_range(unsigned long addr, unsigned long *g2)
{