diff options
| author | Christoph Hellwig <hch@lst.de> | 2019-04-15 11:14:33 +0200 |
|---|---|---|
| committer | Palmer Dabbelt <palmer@sifive.com> | 2019-04-25 23:51:10 +0200 |
| commit | 5cfade5fdcc9753c5b3958f65f0716a31268dd3e (patch) | |
| tree | e79e0917a50a5bf35b5d49db70cedeb9cfde24af | |
| parent | riscv: use asm-generic/extable.h (diff) | |
| download | linux-5cfade5fdcc9753c5b3958f65f0716a31268dd3e.tar.xz linux-5cfade5fdcc9753c5b3958f65f0716a31268dd3e.zip | |
riscv: turn mm_segment_t into a struct
This matches what other heavily used architectures do, and will allow us
to easily use <asm-generic/uaccess.h> for the nommu case.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
| -rw-r--r-- | arch/riscv/include/asm/thread_info.h | 4 | ||||
| -rw-r--r-- | arch/riscv/include/asm/uaccess.h | 12 |
2 files changed, 10 insertions, 6 deletions
diff --git a/arch/riscv/include/asm/thread_info.h b/arch/riscv/include/asm/thread_info.h index 1c9cc8389928..9c039870019b 100644 --- a/arch/riscv/include/asm/thread_info.h +++ b/arch/riscv/include/asm/thread_info.h @@ -28,7 +28,9 @@ #include <asm/processor.h> #include <asm/csr.h> -typedef unsigned long mm_segment_t; +typedef struct { + unsigned long seg; +} mm_segment_t; /* * low level task data that entry.S needs immediate access to diff --git a/arch/riscv/include/asm/uaccess.h b/arch/riscv/include/asm/uaccess.h index cc5b253d4c57..c51fc8bfbdde 100644 --- a/arch/riscv/include/asm/uaccess.h +++ b/arch/riscv/include/asm/uaccess.h @@ -39,8 +39,10 @@ * For historical reasons, these macros are grossly misnamed. */ -#define KERNEL_DS (~0UL) -#define USER_DS (TASK_SIZE) +#define MAKE_MM_SEG(s) ((mm_segment_t) { (s) }) + +#define KERNEL_DS MAKE_MM_SEG(~0UL) +#define USER_DS MAKE_MM_SEG(TASK_SIZE) #define get_fs() (current_thread_info()->addr_limit) @@ -49,9 +51,9 @@ static inline void set_fs(mm_segment_t fs) current_thread_info()->addr_limit = fs; } -#define segment_eq(a, b) ((a) == (b)) +#define segment_eq(a, b) ((a).seg == (b).seg) -#define user_addr_max() (get_fs()) +#define user_addr_max() (get_fs().seg) /** @@ -83,7 +85,7 @@ static inline int __access_ok(unsigned long addr, unsigned long size) { const mm_segment_t fs = get_fs(); - return (size <= fs) && (addr <= (fs - size)); + return size <= fs.seg && addr <= fs.seg - size; } /* |