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arch/microblaze: support get_user() of size 8 bytes 

arch/microblaze/ is missing support for get_user() of size 8 bytes,
so add it by using __copy_from_user().

While there, also drop a lot of the code duplication.

Fixes these build errors:
   drivers/infiniband/core/uverbs_main.o: In function `ib_uverbs_write':
   drivers/infiniband/core/.tmp_gl_uverbs_main.o:(.text+0x13a4): undefined reference to `__user_bad'
   drivers/android/binder.o: In function `binder_thread_write':
   drivers/android/.tmp_gl_binder.o:(.text+0xda6c): undefined reference to `__user_bad'
   drivers/android/.tmp_gl_binder.o:(.text+0xda98): undefined reference to `__user_bad'
   drivers/android/.tmp_gl_binder.o:(.text+0xdf10): undefined reference to `__user_bad'
   drivers/android/.tmp_gl_binder.o:(.text+0xe498): undefined reference to `__user_bad'
   drivers/android/binder.o:drivers/android/.tmp_gl_binder.o:(.text+0xea78): more undefined references to `__user_bad' follow

'make allmodconfig' now builds successfully for arch/microblaze/.

Fixes: 538722ca3b ("microblaze: fix get_user/put_user side-effects")
Reported-by: kbuild test robot <lkp@intel.com>
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Acked-by: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Steven J. Magnani <steve@digidescorp.com>
Cc: Michal Simek <monstr@monstr.eu>
Cc: Jason Gunthorpe <jgg@mellanox.com>
Cc: Leon Romanovsky <leonro@mellanox.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Doug Ledford <dledford@redhat.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
alistair/sunxi64-5.4-dsi
Randy Dunlap 2019-09-16 18:39:44 -07:00 committed by Michal Simek
parent c709bf455d
commit 6a090e9797
1 changed files with 9 additions and 33 deletions
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42
arch/microblaze/include/asm/uaccess.h
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@ -163,44 +163,15 @@ extern long __user_bad(void);
* Returns zero on success, or -EFAULT on error.
* On error, the variable @x is set to zero.
*/
#define get_user(x, ptr) \
__get_user_check((x), (ptr), sizeof(*(ptr)))
#define __get_user_check(x, ptr, size) \
({ \
unsigned long __gu_val = 0; \
const typeof(*(ptr)) __user *__gu_addr = (ptr); \
int __gu_err = 0; \
\
if (access_ok(__gu_addr, size)) { \
switch (size) { \
case 1: \
__get_user_asm("lbu", __gu_addr, __gu_val, \
__gu_err); \
break; \
case 2: \
__get_user_asm("lhu", __gu_addr, __gu_val, \
__gu_err); \
break; \
case 4: \
__get_user_asm("lw", __gu_addr, __gu_val, \
__gu_err); \
break; \
default: \
__gu_err = __user_bad(); \
break; \
} \
} else { \
__gu_err = -EFAULT; \
} \
x = (__force typeof(*(ptr)))__gu_val; \
__gu_err; \
#define get_user(x, ptr) ({ \
const typeof(*(ptr)) __user *__gu_ptr = (ptr); \
access_ok(__gu_ptr, sizeof(*__gu_ptr)) ? \
__get_user(x, __gu_ptr) : -EFAULT; \
})
#define __get_user(x, ptr) \
({ \
unsigned long __gu_val = 0; \
/*unsigned long __gu_ptr = (unsigned long)(ptr);*/ \
long __gu_err; \
switch (sizeof(*(ptr))) { \
case 1: \
@ -212,6 +183,11 @@ extern long __user_bad(void);
case 4: \
__get_user_asm("lw", (ptr), __gu_val, __gu_err); \
break; \
case 8: \
__gu_err = __copy_from_user(&__gu_val, ptr, 8); \
if (__gu_err) \
__gu_err = -EFAULT; \
break; \
default: \
/* __gu_val = 0; __gu_err = -EINVAL;*/ __gu_err = __user_bad();\
} \