linux-toradex.git/arch/mips/kernel, branch tegra

MIPS: Call oops_enter, oops_exit in die

2011-10-01T19:36:04+00:00

This allows pause_on_oops and mtdoops to work.

Signed-off-by: Nathan Lynch 
To: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/2810/
Signed-off-by: Ralf Baechle

MIPS: Compat: Use 32-bit wrapper for compat_sys_futex.

2011-09-21T15:53:44+00:00

We can't trust userspace to pass signed-extend arguments.  Not correctly
sign-extended arguments to futex-wait result in architecturally undefined
operation of 32-bit arithmetic instructions.

For example, if 'val' is too big and bit-31 is 1, the caller may enter
endless loop at:

futex_wait_setup()
{
	...

	if (uval != val) {
		queue_unlock(q, *hb);
		ret = -EWOULDBLOCK;

	...
}

Signed-off-by: Yong Zhang 
To: linux-mips@linux-mips.org
To: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/2714/
Signed-off-by: Ralf Baechle

MIPS: Handle __put_user() sleeping.

2011-09-21T15:52:38+00:00

do_signal() does __put_user() which can fault, resulting in a might_sleep()
warning in down_read(&mm->mmap_sem) and a "scheduling while atomic" warning
when mmap_sem is contented. On Swarm this also results in:

WARNING: at kernel/smp.c:459 smp_call_function_many+0x148/0x398()
Modules linked in:
Call Trace:

[] dump_stack+0x1c/0x50
[] warn_slowpath_common+0x8c/0xc8
[] warn_slowpath_null+0x2c/0x40
[] smp_call_function_many+0x148/0x398
[] smp_call_function+0x58/0xa8
[] r4k_flush_data_cache_page+0x54/0xd8
[] handle_pte_fault+0xa9c/0xad0
[] handle_mm_fault+0x158/0x200
[] do_page_fault+0x218/0x3b0
[] ret_from_exception+0x0/0x10
[] copy_siginfo_to_user32+0x50/0x298
[] setup_rt_frame_32+0x90/0x250
[] do_notify_resume+0x154/0x358
[] work_notifysig+0xc/0x14

Fixed by enabling interrupts in do_notify_resume before delivering signals.

[ralf@linux-mips.org: Reported and original fix by tglx but I wanted to
minimize the amount of code being run with interrupts disabled so I moved
the local_irq_disable() call right into do_notify_resume.  Which is saner
than doing it in entry.S.]

Reported-by: Thomas Gleixner 
Signed-off-by: Ralf Baechle

MIPS: i8259: Mark cascade interrupt non-threaded

2011-09-21T15:52:28+00:00

Cascade interrupts cannot be threaded.

Signed-off-by: Liming Wang 
Signed-off-by: Bruce Ashfield 
Cc: Peter Zijlstra 
Link: http://lkml.kernel.org/r/1314370804-21266-1-git-send-email-liming.wang@windriver.com
Signed-off-by: Thomas Gleixner 
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/2770/
Signed-off-by: Ralf Baechle

MIPS: Make the die_lock be raw

2011-09-21T15:52:09+00:00

On preempt-rt this lock needs to be raw, so it does not get converted
to a sleeping spinlock. Trying to sleep in a panic is not really
desireable.

Signed-off-by: Wu Zhangjin 
Signed-off-by: Thomas Gleixner 
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/2636/
Signed-off-by: Ralf Baechle

MIPS: Ftrace: Fix the CONFIG_DYNAMIC_FTRACE=n compile

2011-09-21T15:52:04+00:00

arch/mips/kernel/ftrace.c: In function ‘ftrace_get_parent_ra_addr’:
arch/mips/kernel/ftrace.c:212: error: implicit declaration of function ‘in_kernel_space’
arch/mips/kernel/ftrace.c: In function ‘prepare_ftrace_return’:
arch/mips/kernel/ftrace.c:314: error: ‘MCOUNT_OFFSET_INSNS’ undeclared (first use in this function)
arch/mips/kernel/ftrace.c:314: error: (Each undeclared identifier is reported only once
arch/mips/kernel/ftrace.c:314: error: for each function it appears in.)

Signed-off-by: Thomas Gleixner 
To: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/2634/
Signed-off-by: Ralf Baechle

MIPS: i8259: Correct comment for i8259

2011-09-17T00:37:04+00:00

The comment for the slave PIC is changed from 8259A-1 to 8259A-2.

Signed-off-by: Hillf Danton 
To:  LKML 
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/2693/
Signed-off-by: Ralf Baechle

MIPS: VPE: Select correct tc

2011-09-17T00:37:03+00:00

If we could find tc on the tc list for @index, the found tc should be returned.

Signed-off-by: Hillf Danton 
To: LKML 
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/2692/
Signed-off-by: Ralf Baechle

All Arch: remove linkage for sys_nfsservctl system call

2011-08-26T22:09:58+00:00

The nfsservctl system call is now gone, so we should remove all
linkage for it.

Signed-off-by: NeilBrown 
Signed-off-by: J. Bruce Fields 
Signed-off-by: Linus Torvalds

atomic: use

2011-07-26T23:49:47+00:00

This allows us to move duplicated code in 
(atomic_inc_not_zero() for now) to 

Signed-off-by: Arun Sharma 
Reviewed-by: Eric Dumazet 
Cc: Ingo Molnar 
Cc: David Miller 
Cc: Eric Dumazet 
Acked-by: Mike Frysinger 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds