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| author | Jisheng Zhang <jszhang@kernel.org> | 2021-11-18 19:22:00 +0800 |
|---|---|---|
| committer | Palmer Dabbelt <palmer@rivosinc.com> | 2022-01-05 17:52:02 -0800 |
| commit | ddad0b88d5032e1c4a2a94b46aeadada4e4d8a72 (patch) | |
| tree | 2d5ce08711ffc19897ec73d7981b0cf8eed79e01 /arch/riscv/include | |
| parent | e232333be69ee9ccd4281032af0d2416940cb98d (diff) | |
| download | linux-ddad0b88d5032e1c4a2a94b46aeadada4e4d8a72.tar.bz2 | |
riscv: remove unused __cmpxchg_user() macro
This macro is defined but not used, remove it.
Signed-off-by: Jisheng Zhang <jszhang@kernel.org>
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
Diffstat (limited to 'arch/riscv/include')
| -rw-r--r-- | arch/riscv/include/asm/uaccess.h | 75 |
1 files changed, 0 insertions, 75 deletions
diff --git a/arch/riscv/include/asm/uaccess.h b/arch/riscv/include/asm/uaccess.h index f314ff44c48d..9f9219545e59 100644 --- a/arch/riscv/include/asm/uaccess.h +++ b/arch/riscv/include/asm/uaccess.h @@ -388,81 +388,6 @@ unsigned long __must_check clear_user(void __user *to, unsigned long n) __clear_user(to, n) : n; } -/* - * Atomic compare-and-exchange, but with a fixup for userspace faults. Faults - * will set "err" to -EFAULT, while successful accesses return the previous - * value. - */ -#define __cmpxchg_user(ptr, old, new, err, size, lrb, scb) \ -({ \ - __typeof__(ptr) __ptr = (ptr); \ - __typeof__(*(ptr)) __old = (old); \ - __typeof__(*(ptr)) __new = (new); \ - __typeof__(*(ptr)) __ret; \ - __typeof__(err) __err = 0; \ - register unsigned int __rc; \ - __enable_user_access(); \ - switch (size) { \ - case 4: \ - __asm__ __volatile__ ( \ - "0:\n" \ - " lr.w" #scb " %[ret], %[ptr]\n" \ - " bne %[ret], %z[old], 1f\n" \ - " sc.w" #lrb " %[rc], %z[new], %[ptr]\n" \ - " bnez %[rc], 0b\n" \ - "1:\n" \ - ".section .fixup,\"ax\"\n" \ - ".balign 4\n" \ - "2:\n" \ - " li %[err], %[efault]\n" \ - " jump 1b, %[rc]\n" \ - ".previous\n" \ - ".section __ex_table,\"a\"\n" \ - ".balign " RISCV_SZPTR "\n" \ - " " RISCV_PTR " 1b, 2b\n" \ - ".previous\n" \ - : [ret] "=&r" (__ret), \ - [rc] "=&r" (__rc), \ - [ptr] "+A" (*__ptr), \ - [err] "=&r" (__err) \ - : [old] "rJ" (__old), \ - [new] "rJ" (__new), \ - [efault] "i" (-EFAULT)); \ - break; \ - case 8: \ - __asm__ __volatile__ ( \ - "0:\n" \ - " lr.d" #scb " %[ret], %[ptr]\n" \ - " bne %[ret], %z[old], 1f\n" \ - " sc.d" #lrb " %[rc], %z[new], %[ptr]\n" \ - " bnez %[rc], 0b\n" \ - "1:\n" \ - ".section .fixup,\"ax\"\n" \ - ".balign 4\n" \ - "2:\n" \ - " li %[err], %[efault]\n" \ - " jump 1b, %[rc]\n" \ - ".previous\n" \ - ".section __ex_table,\"a\"\n" \ - ".balign " RISCV_SZPTR "\n" \ - " " RISCV_PTR " 1b, 2b\n" \ - ".previous\n" \ - : [ret] "=&r" (__ret), \ - [rc] "=&r" (__rc), \ - [ptr] "+A" (*__ptr), \ - [err] "=&r" (__err) \ - : [old] "rJ" (__old), \ - [new] "rJ" (__new), \ - [efault] "i" (-EFAULT)); \ - break; \ - default: \ - BUILD_BUG(); \ - } \ - __disable_user_access(); \ - (err) = __err; \ - __ret; \ -}) - #define HAVE_GET_KERNEL_NOFAULT #define __get_kernel_nofault(dst, src, type, err_label) \ |