linux-toradex.git/arch/um, branch v3.0.63

um: Implement a custom pte_same() function

2012-06-01T07:12:55+00:00

commit f15b9000eb1d09bbaa4b0a6b2089d7e1f64e84b3 upstream.

UML uses the _PAGE_NEWPAGE flag to mark pages which are not jet
installed on the host side using mmap().
pte_same() has to ignore this flag, otherwise unuse_pte_range()
is unable to unuse the page because two identical
page tables entries with different _PAGE_NEWPAGE flags would not
match and swapoff() would never return.

Analyzed-by: Hugh Dickins 
Signed-off-by: Richard Weinberger 
Signed-off-by: Greg Kroah-Hartman

um: Fix __swp_type()

2012-06-01T07:12:55+00:00

commit 2b76ebaa728f8a3967c52aa189261c72fe56a6f1 upstream.

The current __swp_type() function uses a too small bitshift.
Using more than one swap files causes bad pages because
the type bits clash with other page flags.

Analyzed-by: Hugh Dickins 
Signed-off-by: Richard Weinberger 
Signed-off-by: Greg Kroah-Hartman

um: fix ubd cow size

2011-11-11T17:36:19+00:00

commit 8535639810e578960233ad39def3ac2157b0c3ec upstream.

ubd_file_size() cannot use ubd_dev->cow.file because at this time
ubd_dev->cow.file is not initialized.
Therefore, ubd_file_size() will always report a wrong disk size when
COW files are used.
Reading from /dev/ubd* would crash the kernel.

We have to read the correct disk size from the COW file's backing
file.

Signed-off-by: Richard Weinberger 
Signed-off-by: Greg Kroah-Hartman

um: add asm/percpu.h

2011-06-28T01:00:12+00:00

To make SLUB work on UML we need this_cpu_cmpxchg from
asm-generic/percpu.h.

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

arch: remove CONFIG_GENERIC_FIND_{NEXT_BIT,BIT_LE,LAST_BIT}

2011-05-27T00:12:38+00:00

By the previous style change, CONFIG_GENERIC_FIND_NEXT_BIT,
CONFIG_GENERIC_FIND_BIT_LE, and CONFIG_GENERIC_FIND_LAST_BIT are not used
to test for existence of find bitops anymore.

Signed-off-by: Akinobu Mita 
Acked-by: Greg Ungerer 
Cc: Arnd Bergmann 
Cc: Russell King 
Cc: Martin Schwidefsky 
Cc: Heiko Carstens 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

lib: consolidate DEBUG_STACK_USAGE option

2011-05-25T15:39:54+00:00

Most arches define CONFIG_DEBUG_STACK_USAGE exactly the same way.  Move it
to lib/Kconfig.debug so each arch doesn't have to define it.  This
obviously makes the option generic, but that's fine because the config is
already used in generic code.

It's not obvious to me that sysrq-P actually does anything caution by
keeping the most inclusive wording.

Signed-off-by: Stephen Boyd 
Cc: Chris Metcalf 
Acked-by: David S. Miller 
Acked-by: Richard Weinberger 
Acked-by: Mike Frysinger 
Cc: Russell King 
Cc: Hirokazu Takata 
Acked-by: Ralf Baechle 
Cc: Paul Mackerras 
Acked-by: Benjamin Herrenschmidt 
Cc: Chen Liqin 
Cc: Lennox Wu 
Cc: Ingo Molnar 
Cc: Thomas Gleixner 
Cc: "H. Peter Anvin" 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Remove unused PROC_CHANGE_PENALTY constant

2011-05-25T15:39:43+00:00

This constant hasn't been used since before the git era (2.6.12) and thus
can be dropped.

Signed-off-by: Stephen Boyd 
Cc: Russell King 
Cc: Richard Weinberger 
Cc: Hirokazu Takata 
Cc: Kyle McMartin 
Cc: Richard Henderson 
Cc: Ivan Kokshaysky 
Cc: Matt Turner 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

um: fix crash while os_dump_core()

2011-05-25T15:39:42+00:00

os_dump_core() emits SIGTERM to terminate all UML processes.  Kernel
threads have to exit on SIGTERM instead of calling last_ditch_exit().
Multiple calls to last_ditch_exit() can cause a crash.

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

um: include linux/prefetch.h

2011-05-25T15:39:42+00:00

Fix build failures on UML.

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

um: print info about fatal segfaults

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

Print a short info about fatal segfaults like other archs do.

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