diff options
Diffstat (limited to 'arch/sh/mm/extable_64.c')
| -rw-r--r-- | arch/sh/mm/extable_64.c | 28 |
1 files changed, 15 insertions, 13 deletions
diff --git a/arch/sh/mm/extable_64.c b/arch/sh/mm/extable_64.c index a2e6e0563772..f05499688d88 100644 --- a/arch/sh/mm/extable_64.c +++ b/arch/sh/mm/extable_64.c @@ -1,14 +1,14 @@ /* - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file "COPYING" in the main directory of this archive - * for more details. - * - * arch/sh64/mm/extable.c + * arch/sh/mm/extable_64.c * * Copyright (C) 2003 Richard Curnow * Copyright (C) 2003, 2004 Paul Mundt * * Cloned from the 2.5 SH version.. + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. */ #include <linux/rwsem.h> #include <linux/module.h> @@ -21,13 +21,16 @@ static const struct exception_table_entry __copy_user_fixup_ex = { .fixup = (unsigned long)&__copy_user_fixup, }; -/* Some functions that may trap due to a bad user-mode address have too many loads - and stores in them to make it at all practical to label each one and put them all in - the main exception table. - - In particular, the fast memcpy routine is like this. It's fix-up is just to fall back - to a slow byte-at-a-time copy, which is handled the conventional way. So it's functionally - OK to just handle any trap occurring in the fast memcpy with that fixup. */ +/* + * Some functions that may trap due to a bad user-mode address have too + * many loads and stores in them to make it at all practical to label + * each one and put them all in the main exception table. + * + * In particular, the fast memcpy routine is like this. It's fix-up is + * just to fall back to a slow byte-at-a-time copy, which is handled the + * conventional way. So it's functionally OK to just handle any trap + * occurring in the fast memcpy with that fixup. + */ static const struct exception_table_entry *check_exception_ranges(unsigned long addr) { if ((addr >= (unsigned long)©_user_memcpy) && @@ -77,4 +80,3 @@ int fixup_exception(struct pt_regs *regs) return 0; } - |