linux-toradex.git/arch/c6x/kernel, branch v4.0.3

C6x: time: Ensure consistency in __init

2015-05-06T20:04:08+00:00

commit f4831605f2dacd12730fe73961c77253cc2ea425 upstream.

time_init invokes timer64_init (which is __init annotation)
since all of these are invoked at init time, lets maintain
consistency by ensuring time_init is marked appropriately
as well.

This fixes the following warning with CONFIG_DEBUG_SECTION_MISMATCH=y

WARNING: vmlinux.o(.text+0x3bfc): Section mismatch in reference from the function time_init() to the function .init.text:timer64_init()
The function time_init() references
the function __init timer64_init().
This is often because time_init lacks a __init
annotation or the annotation of timer64_init is wrong.

Fixes: 546a39546c64 ("C6X: time management")
Signed-off-by: Nishanth Menon 
Signed-off-by: Mark Salter 
Signed-off-by: Greg Kroah-Hartman

all arches, signal: move restart_block to struct task_struct

2015-02-13T02:54:12+00:00

If an attacker can cause a controlled kernel stack overflow, overwriting
the restart block is a very juicy exploit target.  This is because the
restart_block is held in the same memory allocation as the kernel stack.

Moving the restart block to struct task_struct prevents this exploit by
making the restart_block harder to locate.

Note that there are other fields in thread_info that are also easy
targets, at least on some architectures.

It's also a decent simplification, since the restart code is more or less
identical on all architectures.

[james.hogan@imgtec.com: metag: align thread_info::supervisor_stack]
Signed-off-by: Andy Lutomirski 
Cc: Thomas Gleixner 
Cc: Al Viro 
Cc: "H. Peter Anvin" 
Cc: Ingo Molnar 
Cc: Kees Cook 
Cc: David Miller 
Acked-by: Richard Weinberger 
Cc: Richard Henderson 
Cc: Ivan Kokshaysky 
Cc: Matt Turner 
Cc: Vineet Gupta 
Cc: Russell King 
Cc: Catalin Marinas 
Cc: Will Deacon 
Cc: Haavard Skinnemoen 
Cc: Hans-Christian Egtvedt 
Cc: Steven Miao 
Cc: Mark Salter 
Cc: Aurelien Jacquiot 
Cc: Mikael Starvik 
Cc: Jesper Nilsson 
Cc: David Howells 
Cc: Richard Kuo 
Cc: "Luck, Tony" 
Cc: Geert Uytterhoeven 
Cc: Michal Simek 
Cc: Ralf Baechle 
Cc: Jonas Bonn 
Cc: "James E.J. Bottomley" 
Cc: Helge Deller 
Cc: Benjamin Herrenschmidt 
Cc: Paul Mackerras 
Acked-by: Michael Ellerman  (powerpc)
Tested-by: Michael Ellerman  (powerpc)
Cc: Martin Schwidefsky 
Cc: Heiko Carstens 
Cc: Chen Liqin 
Cc: Lennox Wu 
Cc: Chris Metcalf 
Cc: Guan Xuetao 
Cc: Chris Zankel 
Cc: Max Filippov 
Cc: Oleg Nesterov 
Cc: Guenter Roeck 
Signed-off-by: James Hogan 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

c6x: Use sigsp()

2014-08-06T11:04:07+00:00

Use sigsp() instead of the open coded variant.

Signed-off-by: Richard Weinberger 
Acked-by: Mark Salter

c6x: Use get_signal() signal_setup_done()

2014-08-06T11:02:12+00:00

Use the more generic functions get_signal() signal_setup_done()
for signal delivery.

Tested-by: Mark Salter 
Acked-by: Mark Salter 
Signed-off-by: Richard Weinberger

c6x: convert fdt pointers to opaque pointers

2014-04-30T05:59:12+00:00

The architecture code does not need to access the internals of the FDT
blob, so make the pointer to it void *.

Signed-off-by: Rob Herring 
Cc: Mark Salter 
Cc: Aurelien Jacquiot 
Cc: linux-c6x-dev@linux-c6x.org
Tested-by: Grant Likely

of: remove early_init_dt_setup_initrd_arch

2013-10-09T16:39:01+00:00

All arches do essentially the same thing now for
early_init_dt_setup_initrd_arch, so it can now be removed.

Signed-off-by: Rob Herring 
Acked-by: Vineet Gupta 
Cc: Russell King 
Cc: Mark Salter 
Cc: Aurelien Jacquiot 
Cc: James Hogan 
Cc: Michal Simek 
Cc: Ralf Baechle 
Cc: Jonas Bonn 
Cc: Benjamin Herrenschmidt 
Cc: Paul Mackerras 
Cc: Thomas Gleixner 
Cc: Ingo Molnar 
Cc: "H. Peter Anvin" 
Cc: x86@kernel.org
Cc: Chris Zankel 
Cc: Max Filippov 
Acked-by: Grant Likely

c6x: use early_init_dt_scan

2013-10-09T16:38:12+00:00

Convert c6x to use new early_init_dt_scan function.

Signed-off-by: Rob Herring 
Acked-by: Mark Salter 
Cc: Aurelien Jacquiot 
Cc: linux-c6x-dev@linux-c6x.org

c6x: use boot_command_line instead of private c6x_command_line

2013-10-09T16:37:27+00:00

Save some pointless copying of the kernel command line and just use
boot_command_line instead.

Also remove default_command_line as it is not referenced anywhere, and
the DT code already handles the default command line.

Signed-off-by: Rob Herring 
Tested-by: Mark Salter 
Acked-by: Mark Salter 
Cc: Aurelien Jacquiot 
Cc: linux-c6x-dev@linux-c6x.org
Reviewed-by: Grant Likely

of: consolidate definition of early_init_dt_alloc_memory_arch()

2013-08-28T20:18:32+00:00

Most architectures use the same implementation. Collapse the common ones
into a single weak function that can be overridden.

Signed-off-by: Grant Likely

of: Specify initrd location using 64-bit

2013-07-24T10:10:01+00:00

On some PAE architectures, the entire range of physical memory could reside
outside the 32-bit limit.  These systems need the ability to specify the
initrd location using 64-bit numbers.

This patch globally modifies the early_init_dt_setup_initrd_arch() function to
use 64-bit numbers instead of the current unsigned long.

There has been quite a bit of debate about whether to use u64 or phys_addr_t.
It was concluded to stick to u64 to be consistent with rest of the device
tree code. As summarized by Geert, "The address to load the initrd is decided
by the bootloader/user and set at that point later in time. The dtb should not
be tied to the kernel you are booting"

More details on the discussion can be found here:
https://lkml.org/lkml/2013/6/20/690
https://lkml.org/lkml/2012/9/13/544

Signed-off-by: Santosh Shilimkar 
Acked-by: Rob Herring 
Acked-by: Vineet Gupta 
Acked-by: Jean-Christophe PLAGNIOL-VILLARD 
Signed-off-by: Grant Likely