diff options
Diffstat (limited to 'arch/um')
| -rw-r--r-- | arch/um/Kconfig.i386 | 7 | ||||
| -rw-r--r-- | arch/um/Makefile | 2 | ||||
| -rw-r--r-- | arch/um/Makefile-i386 | 5 | ||||
| -rw-r--r-- | arch/um/drivers/chan_user.c | 11 | ||||
| -rw-r--r-- | arch/um/drivers/net_kern.c | 2 | ||||
| -rw-r--r-- | arch/um/drivers/ubd_kern.c | 1 | ||||
| -rw-r--r-- | arch/um/os-Linux/time.c | 55 |
7 files changed, 72 insertions, 11 deletions
diff --git a/arch/um/Kconfig.i386 b/arch/um/Kconfig.i386 index e0ac74e5d4c4..717f5d3440e3 100644 --- a/arch/um/Kconfig.i386 +++ b/arch/um/Kconfig.i386 @@ -8,6 +8,13 @@ config UML_X86 bool default y +config X86_32 + bool + default y + +config RWSEM_XCHGADD_ALGORITHM + def_bool y + config 64BIT bool default n diff --git a/arch/um/Makefile b/arch/um/Makefile index 31999bc1c8a4..ba6813a4aa37 100644 --- a/arch/um/Makefile +++ b/arch/um/Makefile @@ -168,7 +168,7 @@ ifneq ($(KBUILD_SRC),) $(Q)mkdir -p $(objtree)/include/asm-um $(Q)ln -fsn $(srctree)/include/asm-$(HEADER_ARCH) include/asm-um/arch else - $(Q)cd $(TOPDIR)/include/asm-um && ln -fsn ../asm-$(SUBARCH) arch + $(Q)cd $(TOPDIR)/include/asm-um && ln -fsn ../asm-$(HEADER_ARCH) arch endif $(objtree)/$(ARCH_DIR)/include: diff --git a/arch/um/Makefile-i386 b/arch/um/Makefile-i386 index 67290117d909..561e373bd850 100644 --- a/arch/um/Makefile-i386 +++ b/arch/um/Makefile-i386 @@ -22,11 +22,6 @@ export LDFLAGS HOSTCFLAGS HOSTLDFLAGS UML_OBJCOPYFLAGS endif endif -KBUILD_CFLAGS += -DCONFIG_X86_32 -KBUILD_AFLAGS += -DCONFIG_X86_32 -CONFIG_X86_32 := y -export CONFIG_X86_32 - # First of all, tune CFLAGS for the specific CPU. This actually sets cflags-y. include $(srctree)/arch/x86/Makefile_32.cpu diff --git a/arch/um/drivers/chan_user.c b/arch/um/drivers/chan_user.c index b88e93b3a39f..025764089ac8 100644 --- a/arch/um/drivers/chan_user.c +++ b/arch/um/drivers/chan_user.c @@ -74,10 +74,16 @@ void generic_free(void *data) int generic_console_write(int fd, const char *buf, int n) { + sigset_t old, no_sigio; struct termios save, new; int err; if (isatty(fd)) { + sigemptyset(&no_sigio); + sigaddset(&no_sigio, SIGIO); + if (sigprocmask(SIG_BLOCK, &no_sigio, &old)) + goto error; + CATCH_EINTR(err = tcgetattr(fd, &save)); if (err) goto error; @@ -97,8 +103,11 @@ int generic_console_write(int fd, const char *buf, int n) * Restore raw mode, in any case; we *must* ignore any error apart * EINTR, except for debug. */ - if (isatty(fd)) + if (isatty(fd)) { CATCH_EINTR(tcsetattr(fd, TCSAFLUSH, &save)); + sigprocmask(SIG_SETMASK, &old, NULL); + } + return err; error: return -errno; diff --git a/arch/um/drivers/net_kern.c b/arch/um/drivers/net_kern.c index 73681f14f9fc..3c6c44ca1ffa 100644 --- a/arch/um/drivers/net_kern.c +++ b/arch/um/drivers/net_kern.c @@ -98,10 +98,10 @@ static int uml_net_rx(struct net_device *dev) if (pkt_len > 0) { skb_trim(skb, pkt_len); skb->protocol = (*lp->protocol)(skb); - netif_rx(skb); lp->stats.rx_bytes += skb->len; lp->stats.rx_packets++; + netif_rx(skb); return pkt_len; } diff --git a/arch/um/drivers/ubd_kern.c b/arch/um/drivers/ubd_kern.c index 7e6cdde62ead..b1a77b11f089 100644 --- a/arch/um/drivers/ubd_kern.c +++ b/arch/um/drivers/ubd_kern.c @@ -1128,6 +1128,7 @@ static void do_ubd_request(struct request_queue *q) "errno = %d\n", -n); else if(list_empty(&dev->restart)) list_add(&dev->restart, &restart); + kfree(io_req); return; } diff --git a/arch/um/os-Linux/time.c b/arch/um/os-Linux/time.c index e34e1effe0f5..e49280599465 100644 --- a/arch/um/os-Linux/time.c +++ b/arch/um/os-Linux/time.c @@ -59,7 +59,7 @@ long long disable_timer(void) { struct itimerval time = ((struct itimerval) { { 0, 0 }, { 0, 0 } }); - if(setitimer(ITIMER_VIRTUAL, &time, &time) < 0) + if (setitimer(ITIMER_VIRTUAL, &time, &time) < 0) printk(UM_KERN_ERR "disable_timer - setitimer failed, " "errno = %d\n", errno); @@ -74,13 +74,62 @@ long long os_nsecs(void) return timeval_to_ns(&tv); } +#ifdef UML_CONFIG_NO_HZ +static int after_sleep_interval(struct timespec *ts) +{ + return 0; +} +#else +static inline long long timespec_to_us(const struct timespec *ts) +{ + return ((long long) ts->tv_sec * UM_USEC_PER_SEC) + + ts->tv_nsec / UM_NSEC_PER_USEC; +} + +static int after_sleep_interval(struct timespec *ts) +{ + int usec = UM_USEC_PER_SEC / UM_HZ; + long long start_usecs = timespec_to_us(ts); + struct timeval tv; + struct itimerval interval; + + /* + * It seems that rounding can increase the value returned from + * setitimer to larger than the one passed in. Over time, + * this will cause the remaining time to be greater than the + * tick interval. If this happens, then just reduce the first + * tick to the interval value. + */ + if (start_usecs > usec) + start_usecs = usec; + tv = ((struct timeval) { .tv_sec = start_usecs / UM_USEC_PER_SEC, + .tv_usec = start_usecs % UM_USEC_PER_SEC }); + interval = ((struct itimerval) { { 0, usec }, tv }); + + if (setitimer(ITIMER_VIRTUAL, &interval, NULL) == -1) + return -errno; + + return 0; +} +#endif + extern void alarm_handler(int sig, struct sigcontext *sc); void idle_sleep(unsigned long long nsecs) { - struct timespec ts = { .tv_sec = nsecs / UM_NSEC_PER_SEC, - .tv_nsec = nsecs % UM_NSEC_PER_SEC }; + struct timespec ts; + + /* + * nsecs can come in as zero, in which case, this starts a + * busy loop. To prevent this, reset nsecs to the tick + * interval if it is zero. + */ + if (nsecs == 0) + nsecs = UM_NSEC_PER_SEC / UM_HZ; + ts = ((struct timespec) { .tv_sec = nsecs / UM_NSEC_PER_SEC, + .tv_nsec = nsecs % UM_NSEC_PER_SEC }); if (nanosleep(&ts, &ts) == 0) alarm_handler(SIGVTALRM, NULL); + after_sleep_interval(&ts); } |