Title: [6586] trunk/arch/blackfin/include/asm/uaccess.h: restore exception_table_entry struct -- while we may not use it, common kernel code relies on it
- Revision
- 6586
- Author
- vapier
- Date
- 2009-06-04 14:21:17 -0500 (Thu, 04 Jun 2009)
Log Message
restore exception_table_entry struct -- while we may not use it, common kernel code relies on it
Modified Paths
Diff
Modified: trunk/arch/blackfin/include/asm/uaccess.h (6585 => 6586)
--- trunk/arch/blackfin/include/asm/uaccess.h 2009-06-04 19:19:21 UTC (rev 6585)
+++ trunk/arch/blackfin/include/asm/uaccess.h 2009-06-04 19:21:17 UTC (rev 6586)
@@ -67,6 +67,23 @@
#endif
/*
+ * The exception table consists of pairs of addresses: the first is the
+ * address of an instruction that is allowed to fault, and the second is
+ * the address at which the program should continue. No registers are
+ * modified, so it is entirely up to the continuation code to figure out
+ * what to do.
+ *
+ * All the routines below use bits of fixup code that are out of line
+ * with the main instruction path. This means when everything is well,
+ * we don't even have to jump over them. Further, they do not intrude
+ * on our cache or tlb entries.
+ */
+
+struct exception_table_entry {
+ unsigned long insn, fixup;
+};
+
+/*
* These are the main single-value transfer routines. They automatically
* use the right size if we just have the right pointer type.
*/
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