linux/arch/arc/mm/extable.c
Arnd Bergmann c52801a774 arc: use generic strncpy/strnlen from_user
Remove the arc implemenation of strncpy/strnlen and instead use the
generic versions.  The arc version is fairly slow because it always does
byte accesses even for aligned data, and its checks for user_addr_max()
differ from the generic code.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2021-07-23 14:40:01 +02:00

36 lines
659 B
C

// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) 2004, 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
*
* Borrowed heavily from MIPS
*/
#include <linux/export.h>
#include <linux/extable.h>
#include <linux/uaccess.h>
int fixup_exception(struct pt_regs *regs)
{
const struct exception_table_entry *fixup;
fixup = search_exception_tables(instruction_pointer(regs));
if (fixup) {
regs->ret = fixup->fixup;
return 1;
}
return 0;
}
#ifdef CONFIG_CC_OPTIMIZE_FOR_SIZE
unsigned long arc_clear_user_noinline(void __user *to,
unsigned long n)
{
return __arc_clear_user(to, n);
}
EXPORT_SYMBOL(arc_clear_user_noinline);
#endif