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uaccess: add generic __{get,put}_kernel_nofault

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Nine architectures are still missing __{get,put}_kernel_nofault:
alpha, ia64, microblaze, nds32, nios2, openrisc, sh, sparc32, xtensa.

Add a generic version that lets everything use the normal
copy_{from,to}_kernel_nofault() code based on these, removing the last
use of get_fs()/set_fs() from architecture-independent code.

Reviewed-by: Christoph Hellwig <hch@lst.de>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
Arnd Bergmann
2022-02-11 08:50:00 +01:00
parent 90997c1280
commit 34737e2698
14 changed files with 19 additions and 131 deletions
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2
arch/riscv/include/asm/uaccess.h
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@@ -346,8 +346,6 @@ unsigned long __must_check clear_user(void __user *to, unsigned long n)
__clear_user(to, n) : n;
}
#define HAVE_GET_KERNEL_NOFAULT
#define __get_kernel_nofault(dst, src, type, err_label) \
do { \
long __kr_err; \