| subr_uio.c (207796) | subr_uio.c (218195) |
|---|---|
| 1/*- 2 * Copyright (c) 1982, 1986, 1991, 1993 3 * The Regents of the University of California. All rights reserved. 4 * (c) UNIX System Laboratories, Inc. 5 * All or some portions of this file are derived from material licensed 6 * to the University of California by American Telephone and Telegraph 7 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 8 * the permission of UNIX System Laboratories, Inc. --- 21 unchanged lines hidden (view full) --- 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)kern_subr.c 8.3 (Berkeley) 1/21/94 35 */ 36 37#include <sys/cdefs.h> | 1/*- 2 * Copyright (c) 1982, 1986, 1991, 1993 3 * The Regents of the University of California. All rights reserved. 4 * (c) UNIX System Laboratories, Inc. 5 * All or some portions of this file are derived from material licensed 6 * to the University of California by American Telephone and Telegraph 7 * Co. or Unix System Laboratories, Inc. and are reproduced herein with 8 * the permission of UNIX System Laboratories, Inc. --- 21 unchanged lines hidden (view full) --- 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * @(#)kern_subr.c 8.3 (Berkeley) 1/21/94 35 */ 36 37#include <sys/cdefs.h> |
| 38__FBSDID("$FreeBSD: head/sys/kern/subr_uio.c 207796 2010-05-08 20:34:01Z alc $"); | 38__FBSDID("$FreeBSD: head/sys/kern/subr_uio.c 218195 2011-02-02 16:35:10Z mdf $"); |
| 39 40#include "opt_zero.h" 41 42#include <sys/param.h> 43#include <sys/systm.h> 44#include <sys/kernel.h> 45#include <sys/limits.h> 46#include <sys/lock.h> --- 106 unchanged lines hidden (view full) --- 153 continue; 154 } 155 if (cnt > n) 156 cnt = n; 157 158 switch (uio->uio_segflg) { 159 160 case UIO_USERSPACE: | 39 40#include "opt_zero.h" 41 42#include <sys/param.h> 43#include <sys/systm.h> 44#include <sys/kernel.h> 45#include <sys/limits.h> 46#include <sys/lock.h> --- 106 unchanged lines hidden (view full) --- 153 continue; 154 } 155 if (cnt > n) 156 cnt = n; 157 158 switch (uio->uio_segflg) { 159 160 case UIO_USERSPACE: |
| 161 if (ticks - PCPU_GET(switchticks) >= hogticks) 162 uio_yield(); | 161 maybe_yield(); |
| 163 if (uio->uio_rw == UIO_READ) 164 error = copyout(cp, iov->iov_base, cnt); 165 else 166 error = copyin(iov->iov_base, cp, cnt); 167 if (error) 168 goto out; 169 break; 170 --- 107 unchanged lines hidden (view full) --- 278 continue; 279 } 280 if (cnt > n) 281 cnt = n; 282 283 switch (uio->uio_segflg) { 284 285 case UIO_USERSPACE: | 162 if (uio->uio_rw == UIO_READ) 163 error = copyout(cp, iov->iov_base, cnt); 164 else 165 error = copyin(iov->iov_base, cp, cnt); 166 if (error) 167 goto out; 168 break; 169 --- 107 unchanged lines hidden (view full) --- 277 continue; 278 } 279 if (cnt > n) 280 cnt = n; 281 282 switch (uio->uio_segflg) { 283 284 case UIO_USERSPACE: |
| 286 if (ticks - PCPU_GET(switchticks) >= hogticks) 287 uio_yield(); 288 | 285 maybe_yield(); |
| 289 error = userspaceco(cp, cnt, uio, disposable); | 286 error = userspaceco(cp, cnt, uio, disposable); |
| 290 | |
| 291 if (error) 292 return (error); 293 break; 294 295 case UIO_SYSSPACE: 296 if (uio->uio_rw == UIO_READ) 297 bcopy(cp, iov->iov_base, cnt); 298 else --- 52 unchanged lines hidden (view full) --- 351 } 352 iov->iov_base = (char *)iov->iov_base + 1; 353 iov->iov_len--; 354 uio->uio_resid--; 355 uio->uio_offset++; 356 return (0); 357} 358 | 287 if (error) 288 return (error); 289 break; 290 291 case UIO_SYSSPACE: 292 if (uio->uio_rw == UIO_READ) 293 bcopy(cp, iov->iov_base, cnt); 294 else --- 52 unchanged lines hidden (view full) --- 347 } 348 iov->iov_base = (char *)iov->iov_base + 1; 349 iov->iov_len--; 350 uio->uio_resid--; 351 uio->uio_offset++; 352 return (0); 353} 354 |
| 355int 356should_yield(void) 357{ 358 359 return (ticks - PCPU_GET(switchticks) >= hogticks); 360} 361 |
|
| 359void | 362void |
| 363maybe_yield(void) 364{ 365 366 if (should_yield()) 367 uio_yield(); 368} 369 370void |
|
| 360uio_yield(void) 361{ 362 struct thread *td; 363 364 td = curthread; 365 DROP_GIANT(); 366 thread_lock(td); 367 sched_prio(td, td->td_user_pri); --- 110 unchanged lines hidden --- | 371uio_yield(void) 372{ 373 struct thread *td; 374 375 td = curthread; 376 DROP_GIANT(); 377 thread_lock(td); 378 sched_prio(td, td->td_user_pri); --- 110 unchanged lines hidden --- |