Replace the arch specific versions of search_extable() and sort_extable()
with calls to the generic ones, which now support relative exception
tables as well.
Cc: Richard Henderson <r...@twiddle.net>
Cc: Ivan Kokshaysky <i...@jurassic.park.msu.ru>
Cc: Matt Turner <matts...@gmail.com>
Signed-off-by: Ard Biesheuvel <ard.biesheu...@linaro.org>
---
arch/alpha/include/asm/uaccess.h | 10 ++-
arch/alpha/mm/Makefile | 2 +-
arch/alpha/mm/extable.c | 92 --------------------
3 files changed, 9 insertions(+), 95 deletions(-)
diff --git a/arch/alpha/include/asm/uaccess.h b/arch/alpha/include/asm/uaccess.h
index 9b0d40093c9a..c419b43c461d 100644
--- a/arch/alpha/include/asm/uaccess.h
+++ b/arch/alpha/include/asm/uaccess.h
@@ -483,7 +483,13 @@ struct exception_table_entry
(pc) + (_fixup)->fixup.bits.nextinsn; \
})
-#define ARCH_HAS_SORT_EXTABLE
-#define ARCH_HAS_SEARCH_EXTABLE
+#define ARCH_HAS_RELATIVE_EXTABLE
+
+#define swap_ex_entry_fixup(a, b, tmp, delta) \
+ do { \
+ (a)->fixup.unit = (b)->fixup.unit; \
+ (b)->fixup.unit = (tmp).fixup.unit; \
+ } while (0)
+
#endif /* __ALPHA_UACCESS_H */
diff --git a/arch/alpha/mm/Makefile b/arch/alpha/mm/Makefile
index c993d3f93cf6..5a9807936411 100644
--- a/arch/alpha/mm/Makefile
+++ b/arch/alpha/mm/Makefile
@@ -4,6 +4,6 @@
ccflags-y := -Werror
-obj-y := init.o fault.o extable.o
+obj-y := init.o fault.o
obj-$(CONFIG_DISCONTIGMEM) += numa.o
diff --git a/arch/alpha/mm/extable.c b/arch/alpha/mm/extable.c
deleted file mode 100644
index 813c9b63c0e1..000000000000
--- a/arch/alpha/mm/extable.c
+++ /dev/null
@@ -1,92 +0,0 @@
-/*
- * linux/arch/alpha/mm/extable.c
- */
-
-#include <linux/module.h>
-#include <linux/sort.h>
-#include <asm/uaccess.h>
-
-static inline unsigned long ex_to_addr(const struct exception_table_entry *x)
-{
- return (unsigned long)&x->insn + x->insn;
-}
-
-static void swap_ex(void *a, void *b, int size)
-{
- struct exception_table_entry *ex_a = a, *ex_b = b;
- unsigned long addr_a = ex_to_addr(ex_a), addr_b = ex_to_addr(ex_b);
- unsigned int t = ex_a->fixup.unit;
-
- ex_a->fixup.unit = ex_b->fixup.unit;
- ex_b->fixup.unit = t;
- ex_a->insn = (int)(addr_b - (unsigned long)&ex_a->insn);
- ex_b->insn = (int)(addr_a - (unsigned long)&ex_b->insn);
-}
-
-/*
- * The exception table needs to be sorted so that the binary
- * search that we use to find entries in it works properly.
- * This is used both for the kernel exception table and for
- * the exception tables of modules that get loaded.
- */
-static int cmp_ex(const void *a, const void *b)
-{
- const struct exception_table_entry *x = a, *y = b;
-
- /* avoid overflow */
- if (ex_to_addr(x) > ex_to_addr(y))
- return 1;
- if (ex_to_addr(x) < ex_to_addr(y))
- return -1;
- return 0;
-}
-
-void sort_extable(struct exception_table_entry *start,
- struct exception_table_entry *finish)
-{
- sort(start, finish - start, sizeof(struct exception_table_entry),
- cmp_ex, swap_ex);
-}
-
-#ifdef CONFIG_MODULES
-/*
- * Any entry referring to the module init will be at the beginning or
- * the end.
- */
-void trim_init_extable(struct module *m)
-{
- /*trim the beginning*/
- while (m->num_exentries &&
- within_module_init(ex_to_addr(&m->extable[0]), m)) {
- m->extable++;
- m->num_exentries--;
- }
- /*trim the end*/
- while (m->num_exentries &&
- within_module_init(ex_to_addr(&m->extable[m->num_exentries-1]),
- m))
- m->num_exentries--;
-}
-#endif /* CONFIG_MODULES */
-
-const struct exception_table_entry *
-search_extable(const struct exception_table_entry *first,
- const struct exception_table_entry *last,
- unsigned long value)
-{
- while (first <= last) {
- const struct exception_table_entry *mid;
- unsigned long mid_value;
-
- mid = (last - first) / 2 + first;
- mid_value = ex_to_addr(mid);
- if (mid_value == value)
- return mid;
- else if (mid_value < value)
- first = mid+1;
- else
- last = mid-1;
- }
-
- return NULL;
-}
--
1.9.1
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
