diff options
Diffstat (limited to 'include/asm-mips/uaccess.h')
| -rw-r--r-- | include/asm-mips/uaccess.h | 53 |
1 files changed, 51 insertions, 2 deletions
diff --git a/include/asm-mips/uaccess.h b/include/asm-mips/uaccess.h index 3eff8d8fe28a..b25511787ee0 100644 --- a/include/asm-mips/uaccess.h +++ b/include/asm-mips/uaccess.h @@ -435,8 +435,34 @@ extern size_t __copy_user(void *__to, const void *__from, size_t __n); __cu_len; \ }) -#define __copy_to_user_inatomic __copy_to_user -#define __copy_from_user_inatomic __copy_from_user +extern size_t __copy_user_inatomic(void *__to, const void *__from, size_t __n); + +#define __copy_to_user_inatomic(to,from,n) \ +({ \ + void __user *__cu_to; \ + const void *__cu_from; \ + long __cu_len; \ + \ + __cu_to = (to); \ + __cu_from = (from); \ + __cu_len = (n); \ + __cu_len = __invoke_copy_to_user(__cu_to, __cu_from, __cu_len); \ + __cu_len; \ +}) + +#define __copy_from_user_inatomic(to,from,n) \ +({ \ + void *__cu_to; \ + const void __user *__cu_from; \ + long __cu_len; \ + \ + __cu_to = (to); \ + __cu_from = (from); \ + __cu_len = (n); \ + __cu_len = __invoke_copy_from_user_inatomic(__cu_to, __cu_from, \ + __cu_len); \ + __cu_len; \ +}) /* * copy_to_user: - Copy a block of data into user space. @@ -490,6 +516,29 @@ extern size_t __copy_user(void *__to, const void *__from, size_t __n); __cu_len_r; \ }) +#define __invoke_copy_from_user_inatomic(to,from,n) \ +({ \ + register void *__cu_to_r __asm__ ("$4"); \ + register const void __user *__cu_from_r __asm__ ("$5"); \ + register long __cu_len_r __asm__ ("$6"); \ + \ + __cu_to_r = (to); \ + __cu_from_r = (from); \ + __cu_len_r = (n); \ + __asm__ __volatile__( \ + ".set\tnoreorder\n\t" \ + __MODULE_JAL(__copy_user_inatomic) \ + ".set\tnoat\n\t" \ + __UA_ADDU "\t$1, %1, %2\n\t" \ + ".set\tat\n\t" \ + ".set\treorder" \ + : "+r" (__cu_to_r), "+r" (__cu_from_r), "+r" (__cu_len_r) \ + : \ + : "$8", "$9", "$10", "$11", "$12", "$15", "$24", "$31", \ + "memory"); \ + __cu_len_r; \ +}) + /* * __copy_from_user: - Copy a block of data from user space, with less checking. * @to: Destination address, in kernel space. |