3 files changed, 18 insertions, 1 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/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/os-Linux/time.c b/arch/um/os-Linux/time.c
index ef02d941c2ad..e49280599465 100644
--- a/arch/um/os-Linux/time.c
+++ b/arch/um/os-Linux/time.c
@@ -77,6 +77,7 @@ long long os_nsecs(void)
 #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)