linux-toradex.git/arch/um/include/shared, branch tegra

um: fix oopsable race in line_close()

2011-09-15T01:09:37+00:00

tty->count is decremented only after ->close() had been called and
several tasks can hit it in parallel.  As the result, using tty->count
to check if you are the last one is broken.  We end up leaving line->tty
not reset to NULL and the next IRQ on that sucker will blow up trying to
dereference pointers from kfree'd struct tty.

Fix is obvious: we need to use a counter of our own.

Signed-off-by: Al Viro 
Signed-off-by: Richard Weinberger 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

um: Save FPU registers between task switches

2011-09-15T01:09:37+00:00

Some time ago Jeff prepared 42daba316557 ("uml: stop saving process FP
state") for UML to stop saving the process FP state between task
switches.  The assumption was that since with SKAS0 every guest process
runs inside a host process context the host OS will take care of keeping
the proper FP state.

Unfortunately this is not true for multi-threaded applications, where
all guest threads share a single host process context yet all may use
the FPU on their own.  Although I haven't verified it I suspect things
to be even worse in SKAS3 mode where all guest processes run inside a
single host process.

The patch reintroduces the saving and restoring of the FP context
between task switches.

[richard@nod.at: Ingo posted this patch in 2009, sadly it was never applied
and got lost. Now in 2011 the problem was reported by Gunnar.]

Signed-off-by: Ingo van Lil 
Signed-off-by: Richard Weinberger 
Reported-by: 
Tested-by: 
Cc: Stanislav Meduna 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

um: add earlyprintk support

2011-05-25T15:39:41+00:00

User Mode Linux can also benefit from earlyprintk.  UML's earlyprintk
writes kernel messages directly to stdout.

Signed-off-by: Richard Weinberger 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

um: fix UML_LIB_PATH

2011-05-25T15:39:40+00:00

UML_LIB_PATH is hardcoded to /usr/lib/uml/, on 64bit systems UML_LIB_PATH
needs to be /usr/lib64/uml/.

Signed-off-by: Richard Weinberger 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

um: remove file pointer from ioctl

2011-03-23T00:44:09+00:00

Commit 6caa76b ("tty: now phase out the ioctl file pointer for good")
removed the ioctl file pointer.  User Mode Linux's line driver uses this
ioctl and needs a signature update too.

Signed-off-by: Richard Weinberger 
Cc: Alan Cox 
Cc: Greg KH 
Cc: Jeff Dike 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Deal with missing exports for hostfs

2010-08-09T20:47:25+00:00

Signed-off-by: Al Viro

trivial: fix typo "to to" in multiple files

2009-09-21T13:14:55+00:00

Signed-off-by: Anand Gadiyar 
Signed-off-by: Jiri Kosina

fbdev: move logo externs to header file

2009-06-17T02:47:57+00:00

Now we have __initconst, we can finally move the external declarations for
the various Linux logo structures to .

James' ack dates back to the previous submission (way to long ago), when the
logos were still __initdata, which caused failures on some platforms with some
toolchain versions.

Signed-off-by: Geert Uytterhoeven 
Acked-by: James Simmons 
Cc: Krzysztof Helt 
Cc: Sam Ravnborg 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

uml: UML net driver does not allow for vlans

2009-06-17T02:47:46+00:00

See ancient discussion at
http://marc.info/?l=user-mode-linux-devel&m=101990155831279&w=2

Addresses http://bugzilla.kernel.org/show_bug.cgi?id=7854

Signed-off-by: Alan Cox 
Reported-by: Paolo 'Blaisorblade' Giarrusso 
Cc: Jeff Dike 
Cc: Roland Kletzing 
Cc: "David S. Miller" 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

uml: remove useless comments

2009-04-01T15:59:17+00:00

These comments are useless now, remove them.

Signed-off-by: WANG Cong 
Cc: Jeff Dike 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds