diff options
Diffstat (limited to 'arch/alpha/kernel/osf_sys.c')
-rw-r--r-- | arch/alpha/kernel/osf_sys.c | 66 |
1 files changed, 44 insertions, 22 deletions
diff --git a/arch/alpha/kernel/osf_sys.c b/arch/alpha/kernel/osf_sys.c index 4c540f696..67c08778d 100644 --- a/arch/alpha/kernel/osf_sys.c +++ b/arch/alpha/kernel/osf_sys.c @@ -1128,11 +1128,16 @@ asmlinkage int osf_utimes(const char *filename, struct timeval32 *tvs) return ret; } +#define MAX_SELECT_SECONDS \ + ((unsigned long) (MAX_SCHEDULE_TIMEOUT / HZ)-1) + asmlinkage int osf_select(int n, fd_set *inp, fd_set *outp, fd_set *exp, struct timeval32 *tvp) { - fd_set_buffer *fds; + fd_set_bits fds; + char *bits; + size_t size; unsigned long timeout; int ret; @@ -1145,28 +1150,46 @@ osf_select(int n, fd_set *inp, fd_set *outp, fd_set *exp, || (ret = __get_user(usec, &tvp->tv_usec))) goto out_nofds; - timeout = (usec + 1000000/HZ - 1) / (1000000/HZ); - timeout += sec * HZ; + ret = -EINVAL; + if (sec < 0 || usec < 0) + goto out_nofds; + + if ((unsigned long) sec < MAX_SELECT_SECONDS) { + timeout = (usec + 1000000/HZ - 1) / (1000000/HZ); + timeout += sec * (unsigned long) HZ; + } } + ret = -EINVAL; + if (n < 0 || n > KFDS_NR) + goto out_nofds; + + /* + * We need 6 bitmaps (in/out/ex for both incoming and outgoing), + * since we used fdset we need to allocate memory in units of + * long-words. + */ ret = -ENOMEM; - fds = (fd_set_buffer *) __get_free_page(GFP_KERNEL); - if (!fds) + size = FDS_BYTES(n); + bits = kmalloc(6 * size, GFP_KERNEL); + if (!bits) goto out_nofds; - ret = -EINVAL; - if (n < 0) - goto out; - if (n > KFDS_NR) - n = KFDS_NR; - if ((ret = get_fd_set(n, inp->fds_bits, fds->in)) || - (ret = get_fd_set(n, outp->fds_bits, fds->out)) || - (ret = get_fd_set(n, exp->fds_bits, fds->ex))) + fds.in = (unsigned long *) bits; + fds.out = (unsigned long *) (bits + size); + fds.ex = (unsigned long *) (bits + 2*size); + fds.res_in = (unsigned long *) (bits + 3*size); + fds.res_out = (unsigned long *) (bits + 4*size); + fds.res_ex = (unsigned long *) (bits + 5*size); + + if ((ret = get_fd_set(n, inp->fds_bits, fds.in)) || + (ret = get_fd_set(n, outp->fds_bits, fds.out)) || + (ret = get_fd_set(n, exp->fds_bits, fds.ex))) goto out; - zero_fd_set(n, fds->res_in); - zero_fd_set(n, fds->res_out); - zero_fd_set(n, fds->res_ex); + zero_fd_set(n, fds.res_in); + zero_fd_set(n, fds.res_out); + zero_fd_set(n, fds.res_ex); - ret = do_select(n, fds, &timeout); + ret = do_select(n, &fds, &timeout); /* OSF does not copy back the remaining time. */ @@ -1179,12 +1202,12 @@ osf_select(int n, fd_set *inp, fd_set *outp, fd_set *exp, ret = 0; } - set_fd_set(n, inp->fds_bits, fds->res_in); - set_fd_set(n, outp->fds_bits, fds->res_out); - set_fd_set(n, exp->fds_bits, fds->res_ex); + set_fd_set(n, inp->fds_bits, fds.res_in); + set_fd_set(n, outp->fds_bits, fds.res_out); + set_fd_set(n, exp->fds_bits, fds.res_ex); out: - free_page((unsigned long) fds); + kfree(bits); out_nofds: return ret; } @@ -1304,7 +1327,6 @@ asmlinkage int osf_usleep_thread(struct timeval32 *sleep, struct timeval32 *rema { struct timeval tmp; unsigned long ticks; - unsigned long tmp_timeout; if (get_tv32(&tmp, sleep)) goto fault; |