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sh: Implement __get_user_u64() required for 64-bit get_user() 

Trying to build the kernel with CONFIG_INFINIBAND_USER_ACCESS enabled fails

     ERROR: "__get_user_unknown" [drivers/infiniband/core/ib_uverbs.ko] undefined!

with on SH since the kernel misses a 64-bit implementation of get_user().

Implement the missing 64-bit get_user() as __get_user_u64(), matching the
already existing __put_user_u64() which implements the 64-bit put_user().

Signed-off-by: John Paul Adrian Glaubitz <glaubitz@physik.fu-berlin.de>
Acked-by: Yoshinori Sato <ysato@users.sourceforge.jp>
Signed-off-by: Rich Felker <dalias@libc.org>
This commit is contained in:
John Paul Adrian Glaubitz 2020-06-11 09:58:11 +02:00 committed by Rich Felker
parent 2202d81b09
commit 2d2b308a8b
1 changed files with 53 additions and 0 deletions
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53
arch/sh/include/asm/uaccess_32.h
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@ -26,6 +26,9 @@ do { \
case 4: \
__get_user_asm(x, ptr, retval, "l"); \
break; \
case 8: \
__get_user_u64(x, ptr, retval); \
break; \
default: \
__get_user_unknown(); \
break; \
@ -66,6 +69,56 @@ do { \
extern void __get_user_unknown(void);
#if defined(CONFIG_CPU_LITTLE_ENDIAN)
#define __get_user_u64(x, addr, err) \
({ \
__asm__ __volatile__( \
"1:\n\t" \
"mov.l %2,%R1\n\t" \
"mov.l %T2,%S1\n\t" \
"2:\n" \
".section .fixup,\"ax\"\n" \
"3:\n\t" \
"mov #0,%R1\n\t" \
"mov #0,%S1\n\t" \
"mov.l 4f, %0\n\t" \
"jmp @%0\n\t" \
" mov %3, %0\n\t" \
".balign 4\n" \
"4: .long 2b\n\t" \
".previous\n" \
".section __ex_table,\"a\"\n\t" \
".long 1b, 3b\n\t" \
".long 1b + 2, 3b\n\t" \
".previous" \
:"=&r" (err), "=&r" (x) \
:"m" (__m(addr)), "i" (-EFAULT), "0" (err)); })
#else
#define __get_user_u64(x, addr, err) \
({ \
__asm__ __volatile__( \
"1:\n\t" \
"mov.l %2,%S1\n\t" \
"mov.l %T2,%R1\n\t" \
"2:\n" \
".section .fixup,\"ax\"\n" \
"3:\n\t" \
"mov #0,%S1\n\t" \
"mov #0,%R1\n\t" \
"mov.l 4f, %0\n\t" \
"jmp @%0\n\t" \
" mov %3, %0\n\t" \
".balign 4\n" \
"4: .long 2b\n\t" \
".previous\n" \
".section __ex_table,\"a\"\n\t" \
".long 1b, 3b\n\t" \
".long 1b + 2, 3b\n\t" \
".previous" \
:"=&r" (err), "=&r" (x) \
:"m" (__m(addr)), "i" (-EFAULT), "0" (err)); })
#endif
#define __put_user_size(x,ptr,size,retval) \
do { \
retval = 0; \