linux-toradex.git/mm/maccess.c, branch v3.2.3

mm: Map most files to use export.h instead of module.h

2011-10-31T13:20:12+00:00

The files changed within are only using the EXPORT_SYMBOL
macro variants.  They are not using core modular infrastructure
and hence don't need module.h but only the export.h header.

Signed-off-by: Paul Gortmaker

maccess,probe_kernel: Make write/read src const void *

2011-05-25T23:56:23+00:00

The functions probe_kernel_write() and probe_kernel_read() do not modify
the src pointer. Allow const pointers to be passed in without the need
of a typecast.

Acked-by: Mike Frysinger 
Acked-by: Heiko Carstens 
Acked-by: Martin Schwidefsky 
Signed-off-by: Steven Rostedt 
Link: http://lkml.kernel.org/r/1305824936.1465.4.camel@gandalf.stny.rr.com

MN10300: Save frame pointer in thread_info struct rather than global var

2010-10-27T16:29:01+00:00

Save the current exception frame pointer in the thread_info struct rather than
in a global variable as the latter makes SMP tricky, especially when preemption
is also enabled.

This also replaces __frame with current_frame() and rearranges header file
inclusions to make it all compile.

Signed-off-by: David Howells 
Acked-by: Akira Takeuchi

maccess,probe_kernel: Allow arch specific override probe_kernel_(read|write)

2010-01-07T17:58:36+00:00

Some archs such as blackfin, would like to have an arch specific
probe_kernel_read() and probe_kernel_write() implementation which can
fall back to the generic implementation if no special operations are
needed.

CC: Thomas Gleixner 
CC: Ingo Molnar 
Signed-off-by: Jason Wessel 
Signed-off-by: Mike Frysinger

[S390] maccess: add weak attribute to probe_kernel_write

2009-06-12T08:27:37+00:00

probe_kernel_write() gets used to write to the kernel address space.
E.g. to patch the kernel (kgdb, ftrace, kprobes...). Some architectures
however enable write protection for the kernel text section, so that
writes to this region would fault.
This patch allows to specify an architecture specific version of
probe_kernel_write() which allows to handle and bypass write protection
of the text segment.
That way it is still possible to catch random writes to kernel text
and explicitly allow writes via this interface.

Signed-off-by: Heiko Carstens 
Signed-off-by: Martin Schwidefsky

kgdb: fix optional arch functions and probe_kernel_*

2008-04-17T18:05:39+00:00

Fix two regressions dealing with the kgdb core.

1) kgdb_skipexception and kgdb_post_primary_code are optional
functions that are only required on archs that need special exception
fixups.

2) The kernel address space scope must be set on any probe_kernel_*
function or archs such as ARCH=arm will not allow access to the kernel
memory space.  As an example, it is required to allow the full kernel
address space is when you the kernel debugger to inspect a system
call.

Signed-off-by: Jason Wessel 
Signed-off-by: Ingo Molnar

uaccess: add probe_kernel_write()

2008-04-17T18:05:36+00:00

add probe_kernel_read() and probe_kernel_write().

Uninlined and restricted to kernel range memory only, as suggested
by Linus.

Signed-off-by: Ingo Molnar 
Reviewed-by: Thomas Gleixner