#ifndef __ASM_SH_FUTEX_H #define __ASM_SH_FUTEX_H #ifdef __KERNEL__ #include <linux/futex.h> #include <linux/uaccess.h> #include <asm/errno.h> /* XXX: UP variants, fix for SH-4A and SMP.. */ #include <asm/futex-irq.h> static inline int futex_atomic_op_inuser(int encoded_op, int __user *uaddr) { int op = (encoded_op >> 28) & 7; int cmp = (encoded_op >> 24) & 15; int oparg = (encoded_op << 8) >> 20; int cmparg = (encoded_op << 20) >> 20; int oldval = 0, ret; if (encoded_op & (FUTEX_OP_OPARG_SHIFT << 28)) oparg = 1 << oparg; if (!access_ok(VERIFY_WRITE, uaddr, sizeof(int))) return -EFAULT; pagefault_disable(); switch (op) { case FUTEX_OP_SET: ret = atomic_futex_op_xchg_set(oparg, uaddr, &oldval); break; case FUTEX_OP_ADD: ret = atomic_futex_op_xchg_add(oparg, uaddr, &oldval); break; case FUTEX_OP_OR: ret = atomic_futex_op_xchg_or(oparg, uaddr, &oldval); break; case FUTEX_OP_ANDN: ret = atomic_futex_op_xchg_and(~oparg, uaddr, &oldval); break; case FUTEX_OP_XOR: ret = atomic_futex_op_xchg_xor(oparg, uaddr, &oldval); break; default: ret = -ENOSYS; break; } pagefault_enable(); if (!ret) { switch (cmp) { case FUTEX_OP_CMP_EQ: ret = (oldval == cmparg); break; case FUTEX_OP_CMP_NE: ret = (oldval != cmparg); break; case FUTEX_OP_CMP_LT: ret = (oldval < cmparg); break; case FUTEX_OP_CMP_GE: ret = (oldval >= cmparg); break; case FUTEX_OP_CMP_LE: ret = (oldval <= cmparg); break; case FUTEX_OP_CMP_GT: ret = (oldval > cmparg); break; default: ret = -ENOSYS; } } return ret; } static inline int futex_atomic_cmpxchg_inatomic(int __user *uaddr, int oldval, int newval) { if (!access_ok(VERIFY_WRITE, uaddr, sizeof(int))) return -EFAULT; return atomic_futex_op_cmpxchg_inatomic(uaddr, oldval, newval); } #endif /* __KERNEL__ */ #endif /* __ASM_SH_FUTEX_H */