linux.git/arch/um/kernel, branch v2.6.20

[PATCH] tty: ->signal->tty locking

2006-12-08T16:28:38+00:00

Fix the locking of signal->tty.

Use ->sighand->siglock to protect ->signal->tty; this lock is already used
by most other members of ->signal/->sighand.  And unless we are 'current'
or the tasklist_lock is held we need ->siglock to access ->signal anyway.

(NOTE: sys_unshare() is broken wrt ->sighand locking rules)

Note that tty_mutex is held over tty destruction, so while holding
tty_mutex any tty pointer remains valid.  Otherwise the lifetime of ttys
are governed by their open file handles.  This leaves some holes for tty
access from signal->tty (or any other non file related tty access).

It solves the tty SLAB scribbles we were seeing.

(NOTE: the change from group_send_sig_info to __group_send_sig_info needs to
       be examined by someone familiar with the security framework, I think
       it is safe given the SEND_SIG_PRIV from other __group_send_sig_info
       invocations)

[schwidefsky@de.ibm.com: 3270 fix]
[akpm@osdl.org: various post-viro fixes]
Signed-off-by: Peter Zijlstra 
Acked-by: Alan Cox 
Cc: Oleg Nesterov 
Cc: Prarit Bhargava 
Cc: Chris Wright 
Cc: Roland McGrath 
Cc: Stephen Smalley 
Cc: James Morris 
Cc: "David S. Miller" 
Cc: Jeff Dike 
Cc: Martin Schwidefsky 
Cc: Jan Kara 
Signed-off-by: Martin Schwidefsky 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] uml: add _text definition to linker scripts

2006-10-31T16:07:00+00:00

kallsyms now refers to addresses as '_text + 0xADDRESS', rather than just
'0xADDRESS', so we need to define _text.

Signed-off-by: Jeff Dike 
Cc: Paolo 'Blaisorblade' Giarrusso 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] uml ubd driver: various little changes

2006-10-31T16:07:00+00:00

Fix a small memory leak in ubd_config, and clearify the confusion which lead
to it.

Then, some little changes not affecting operations -
* move init functions together,
* add a comment about a potential problem in case of some evolution in the block layer,
* mark all initcalls as static __init functions
* mark an used once little function as inline
* document that mconsole methods are all called in process context (was
  triggered when checking ubd mconsole methods).

Signed-off-by: Paolo 'Blaisorblade' Giarrusso 
Cc: Jeff Dike 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] uml: split memory allocation prototypes out of user.h

2006-10-20T17:26:36+00:00

user.h is too generic a header name.  I've split out allocation routines from
it.

Signed-off-by: Paolo 'Blaisorblade' Giarrusso 
Cc: Jeff Dike 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] uml: make TT mode compile after setjmp-related changes

2006-10-11T18:14:20+00:00

Make TT mode compile after the introduction of klibc's implementation of
setjmp.

Signed-off-by: Paolo 'Blaisorblade' Giarrusso 
Cc: Jeff Dike 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

[PATCH] uml: correct removal of pte_mkexec

2006-10-11T18:14:20+00:00

Correct commit 5906e4171ad61ce68de95e51b773146707671f80 - this makes more
sense: we turn pte_mkexec + pte_wrprotect to pte_mkread.  However, due to a
bug in pte_mkread, it does the exact same thing as pte_mkwrite, so this patch
improves the code but does not change anything in practice.  The pte_mkread
bug is fixed separately, as it may have big impact.

Signed-off-by: Paolo 'Blaisorblade' Giarrusso 
Cc: Jeff Dike 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

IRQ: Use the new typedef for interrupt handler function pointers

2006-10-09T11:19:47+00:00

Use the new typedef for interrupt handler function pointers rather than
actually spelling out the full thing each time.  This was scripted with the
following small shell script:

#!/bin/sh
egrep -nHrl -e 'irqreturn_t[ 	]*[(][*]' $* |
while read i
do
    echo $i
    perl -pi -e 's/irqreturn_t\s*[(]\s*[*]\s*([_a-zA-Z0-9]*)\s*[)]\s*[(]\s*int\s*,\s*void\s*[*]\s*[)]/irq_handler_t \1/g' $i || exit $?
done

Signed-Off-By: David Howells

[PATCH] uml pt_regs fixes

2006-10-08T23:34:08+00:00

Real fix for UML pt_regs stuff.  Note set_irq_regs() logics in there...

Signed-off-by: Al Viro 
Signed-off-by: Linus Torvalds

[PATCH] um: irq changes break build

2006-10-06T15:53:42+00:00

Fixup broken UML build due to 7d12e780e003f93433d49ce78cfedf4b4c52adc5
"IRQ: Maintain regs pointer globally rather than passing to IRQ handlers".

Cc: David Howells 
Cc: Jeff Dike 
Cc: Paolo "Blaisorblade" Giarrusso 
Signed-off-by: Pekka Enberg 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Remove all inclusions of

2006-10-04T07:38:54+00:00

kbuild explicitly includes this at build time.

Signed-off-by: Dave Jones