linux.git/arch/frv/kernel, branch v2.6.25

FRV: Correctly determine the address of an illegal instruction

2008-04-14T14:55:15+00:00

Correctly determine the address of an illegal instruction.  The EPCR0 register
holds this value (masked by EPCR0_PC) if the validity bit is set (masked by
EPCR0_V).  So the test as to whether the contents of the register are usable
should be involve checking the _V bit, not the _PC bits.

Signed-off-by: David Howells 
Signed-off-by: Linus Torvalds

FRV: Make NOMMU-mode work with base addresses other than 0xC0000000 [try #2]

2008-04-10T20:41:29+00:00

Make NOMMU-mode work with base addresses other than 0xC0000000 by:

 (1) Giving the code that sets up the protection registers the right address
     in __sdram_base.  Rather than being hard coded to 0xC0000000, the value
     of __page_offset is obtained from the linker script.

 (2) Eliminate the check in __switch_to() that verifies the current thread
     info is in the 0xCxxxxxxx region.

Signed-off-by: David Howells 
Signed-off-by: Linus Torvalds

FRV: Add support for emulation of userspace atomic ops [try #2]

2008-04-10T20:41:29+00:00

Use traps 120-126 to emulate atomic cmpxchg32, xchg32, and XOR-, OR-, AND-, SUB-
and ADD-to-memory operations for userspace.

Signed-off-by: David Howells 
Signed-off-by: Linus Torvalds

FRV: Change the timerfd syscalls to be the same as i386

2008-02-21T03:58:16+00:00

Change the FRV timerfd syscalls to be the same as i386 timerfd syscalls.

Signed-off-by: David Howells 
Signed-off-by: Linus Torvalds

FRV: Drop the .data.idt section for FRV

2008-02-21T03:58:16+00:00

There is no .data.idt section for FRV, so drop it from the linker script.

Signed-off-by: David Howells 
Signed-off-by: Linus Torvalds

xtime_lock vs update_process_times

2008-02-13T21:29:25+00:00

Commit d3d74453c34f8fd87674a8cf5b8a327c68f22e99 ("hrtimer: fixup the
HRTIMER_CB_IRQSAFE_NO_SOFTIRQ fallback") broke several archs, and since
only Russell bothered to merge the fix, and Greg to ACK his arch, I'm
sending this for merger.

I have confirmation that the Alpha bit results in a booting kernel.
That leaves: blackfin, frv, sh and sparc untested.

The deadlock in question was found by Russell:

  IRQ handle
    -> timer_tick() - xtime seqlock held for write
      -> update_process_times()
        -> run_local_timers()
          -> hrtimer_run_queues()
            -> hrtimer_get_softirq_time() - tries to get a read lock

Now, Thomas assures me the fix is trivial, only do_timer() needs to be
done under the xtime_lock, and update_process_times() can savely be
removed from under it.

Signed-off-by: Peter Zijlstra 
Acked-by: Greg Ungerer 
CC: Richard Henderson 
CC: Bryan Wu 
CC: David Howells 
CC: Paul Mundt 
CC: William Irwin 
Acked-by: Ingo Molnar 
Acked-by: Ivan Kokshaysky 
Signed-off-by: Linus Torvalds

FRV: Fix up parse error in linker script

2008-02-13T16:26:01+00:00

Fix up parse error in FRV linker script, presumably introduced through changes
to the INIT_TEXT and EXIT_TEXT macros.

Signed-off-by: David Howells 
Signed-off-by: Linus Torvalds

procfs: constify function pointer tables

2008-02-08T17:22:38+00:00

Signed-off-by: Jan Engelhardt 
Acked-by: Geert Uytterhoeven 
Acked-by: Mike Frysinger 
Acked-By: David Howells 
Acked-by: Bryan Wu 
Acked-by: Jesper Nilsson 
Cc: 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Introduce flags for reserve_bootmem()

2008-02-07T16:42:25+00:00

This patchset adds a flags variable to reserve_bootmem() and uses the
BOOTMEM_EXCLUSIVE flag in crashkernel reservation code to detect collisions
between crashkernel area and already used memory.

This patch:

Change the reserve_bootmem() function to accept a new flag BOOTMEM_EXCLUSIVE.
If that flag is set, the function returns with -EBUSY if the memory already
has been reserved in the past.  This is to avoid conflicts.

Because that code runs before SMP initialisation, there's no race condition
inside reserve_bootmem_core().

[akpm@linux-foundation.org: coding-style fixes]
[akpm@linux-foundation.org: fix powerpc build]
Signed-off-by: Bernhard Walle 
Cc: 
Cc: "Eric W. Biederman" 
Cc: Vivek Goyal 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

calibrate_delay() must be __cpuinit

2008-02-06T18:41:08+00:00

calibrate_delay() must be __cpuinit, not __{dev,}init.

I've verified that this is correct for all users.

While doing the latter, I also did the following cleanups:
- remove pointless additional prototypes in C files
- ensure all users #include 

This fixes the following section mismatches with CONFIG_HOTPLUG=n,
CONFIG_HOTPLUG_CPU=y:

WARNING: vmlinux.o(.text+0x1128d): Section mismatch: reference to .init.text.1:calibrate_delay (between 'check_cx686_slop' and 'set_cx86_reorder')
WARNING: vmlinux.o(.text+0x25102): Section mismatch: reference to .init.text.1:calibrate_delay (between 'smp_callin' and 'cpu_coregroup_map')

Signed-off-by: Adrian Bunk 
Cc: Ivan Kokshaysky 
Cc: Richard Henderson 
Cc: "Luck, Tony" 
Cc: Ralf Baechle 
Cc: Paul Mackerras 
Cc: Benjamin Herrenschmidt 
Cc: "David S. Miller" 
Cc: Thomas Gleixner 
Cc: Ingo Molnar 
Cc: Christian Zankel 
Cc: Heiko Carstens 
Cc: Martin Schwidefsky 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds