linux-stable.git/arch/um/kernel, branch v3.2 Linux kernel stable tree um: distribute exports to where exported stuff is defined 2011-11-02T13:15:36+00:00 Al Viro viro@ftp.linux.org.uk 2011-08-18T19:14:10+00:00 73395a0002aa9573ffc8d989587b79663847f705 ksyms.c is down to the stuff defined in various USER_OBJS Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Richard Weinberger <richard@nod.at> 
ksyms.c is down to the stuff defined in various USER_OBJS

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Richard Weinberger <richard@nod.at>
um: fix gcov build breakage 2011-11-02T13:15:26+00:00 Al Viro viro@ftp.linux.org.uk 2011-08-18T19:11:49+00:00 4d211093e838ddd049b5cf4f0773aa5ac67f9976 a) exports in gmon_syms.c duplicate kernel/gcov/* ones b) excluding -pg in vdso compile is not enough - -fprofile-arcs and -ftest-coverage also needs to be excluded Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Richard Weinberger <richard@nod.at> 
a) exports in gmon_syms.c duplicate kernel/gcov/* ones
b) excluding -pg in vdso compile is not enough - -fprofile-arcs
and -ftest-coverage also needs to be excluded

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Richard Weinberger <richard@nod.at>
um: kill shared/tlb.h 2011-11-02T13:15:10+00:00 Al Viro viro@ftp.linux.org.uk 2011-08-18T19:07:59+00:00 445c5786c9ce02b6816bb11fd3394a134fa6d244 Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Richard Weinberger <richard@nod.at> 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Richard Weinberger <richard@nod.at>
um: make flush_tlb_kernel_range_common() static 2011-11-02T13:15:09+00:00 Al Viro viro@ftp.linux.org.uk 2011-08-18T19:07:49+00:00 c75d053b701cc098d44b729c8266a2df5ca5206e Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Richard Weinberger <richard@nod.at> 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Richard Weinberger <richard@nod.at>
um: make load_initrd() static, kill shared/initrd.h 2011-11-02T13:15:06+00:00 Al Viro viro@ftp.linux.org.uk 2011-08-18T19:06:59+00:00 549e78db9438374cb6a58201cc5f2194b222688f Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Richard Weinberger <richard@nod.at> 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Richard Weinberger <richard@nod.at>
um: kill includes of sysdep/sigcontext.h from stuff built with kernel headers 2011-11-02T13:14:54+00:00 Al Viro viro@ftp.linux.org.uk 2011-08-18T19:03:59+00:00 adcfb9852d8f2ddba908da0d023c280e23a40452 Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Richard Weinberger <richard@nod.at> 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Richard Weinberger <richard@nod.at>
um: kill dead code around uaccess 2011-11-02T13:14:52+00:00 Al Viro viro@ftp.linux.org.uk 2011-08-18T19:03:29+00:00 5d40de0f6e726dc9c48fb35815e0a6153e59e1dc Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Richard Weinberger <richard@nod.at> 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Richard Weinberger <richard@nod.at>
um: -include user.h for USER_OBJ, trim includes 2011-11-02T13:14:44+00:00 Al Viro viro@ftp.linux.org.uk 2011-08-18T19:01:29+00:00 078073a3d48ce7c140f1538d249da3ac545065a6 Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Richard Weinberger <richard@nod.at> 
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Richard Weinberger <richard@nod.at>
um: clean arch_ptrace() up a bit 2011-09-15T01:09:37+00:00 Al Viro viro@ftp.linux.org.uk 2011-09-14T23:21:37+00:00 f2833aef6a0517e933992c8007f330d0df5d9317 1) take subarch-specific stuff to subarch_ptrace() 2) PTRACE_{PEEK,POKE}{TEXT,DATA} is handled by ptrace_request() just fine... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Richard Weinberger <richard@nod.at> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> 
1) take subarch-specific stuff to subarch_ptrace()
2) PTRACE_{PEEK,POKE}{TEXT,DATA} is handled by ptrace_request() just fine...

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
um: Save FPU registers between task switches 2011-09-15T01:09:37+00:00 Ingo van Lil inguin@gmx.de 2011-09-14T23:21:23+00:00 fbfe9c847edf57ac8232aeafb290f272289893a3 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 <inguin@gmx.de> Signed-off-by: Richard Weinberger <richard@nod.at> Reported-by: <gunnarlindroth@hotmail.com> Tested-by: <gunnarlindroth@hotmail.com> Cc: Stanislav Meduna <stano@meduna.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> 
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 <inguin@gmx.de>
Signed-off-by: Richard Weinberger <richard@nod.at>
Reported-by: <gunnarlindroth@hotmail.com>
Tested-by: <gunnarlindroth@hotmail.com>
Cc: Stanislav Meduna <stano@meduna.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>