linux-stable.git/arch/nios2, branch v4.0

nios2: fix cache coherency issue when debug with gdb

2015-04-10T03:10:08+00:00

Remove the end address checking for flushda function. We need to flush
each address line for flushda instruction, from start to end address.
This is because flushda instruction only flush the cache if tag and line
fields are matched.

Change to use ldwio instruction (bypass cache) to load the instruction
that causing trap. Our interest is the actual instruction that executed
by the processor, this should be uncached.
Note, EA address might be an userspace cached address.


Signed-off-by: Ley Foon Tan

nios2: add missing ptrace registers defines

2015-04-09T10:28:05+00:00

These are all register available in nios2.

Signed-off-by: Ley Foon Tan

nios2: signal: Move restart_block to struct task_struct

2015-04-08T05:45:16+00:00

See https://lkml.org/lkml/2014/10/29/643 and commit f56141e3e2d9
("all arches, signal: move restart_block to struct task_struct")

Signed-off-by: Ley Foon Tan

nios2: mm: do not invoke OOM killer on kernel fault OOM

2015-03-16T07:35:25+00:00

Follow commit 871341023c771ad.

Kernel faults are expected to handle OOM conditions gracefully (gup,
uaccess etc.), so they should never invoke the OOM killer.  Reserve
this for faults triggered in user context when it is the only option.

Signed-off-by: Ley Foon Tan

nios2: Remove ucontext.h from exported arch headers

2015-03-16T02:20:41+00:00

Commit 92d5dd8cd6e2 ("nios2: update pt_regs") removed the nios2 specific
ucontext.h, replacing it with the version from asm-generic. Thus it's no
longer necessary to include ucontext.h in exported headers.

Cc: Chung-Ling Tang 
Signed-off-by: Tobias Klauser 
Acked-by: Ley Foon Tan

nios2: update pt_regs

2015-03-12T05:35:06+00:00

Remove struct pt_regs from user header and use generic ucontext.h.

Signed-off-by: Chung-Ling Tang 
Acked-by: Ley Foon Tan

Merge tag 'nios2-v3.20-rc1' of git://git.rocketboards.org/linux-socfpga-next

2015-02-17T22:23:42+00:00

Pull arch/nios2 update from Ley Foon Tan:
 "Here is the nios2 update for 3.20:

   - add early printk support
   - add kgdb support
   - add compressed kernel support
   - bugfixes"

* tag 'nios2-v3.20-rc1' of git://git.rocketboards.org/linux-socfpga-next:
  nios2: add kgdb support
  MAINTAINERS: update arch/nios2 git tree
  nios2: default CONFIG_NIOS2_BOOT_LINK_OFFSET to 8MB
  nios2: Add support for compressed kernel
  nios2: add early printk support
  nios2: Port OOM changes to do_page_fault()
  nios2: Remove unused prepare_to_copy()

nios2: add kgdb support

2015-02-16T11:26:43+00:00

Signed-off-by: Ley Foon Tan

mm: make FIRST_USER_ADDRESS unsigned long on all archs

2015-02-12T01:06:03+00:00

LKP has triggered a compiler warning after my recent patch "mm: account
pmd page tables to the process":

    mm/mmap.c: In function 'exit_mmap':
 >> mm/mmap.c:2857:2: warning: right shift count >= width of type [enabled by default]

The code:

 > 2857                WARN_ON(mm_nr_pmds(mm) >
   2858                                round_up(FIRST_USER_ADDRESS, PUD_SIZE) >> PUD_SHIFT);

In this, on tile, we have FIRST_USER_ADDRESS defined as 0.  round_up() has
the same type -- int.  PUD_SHIFT.

I think the best way to fix it is to define FIRST_USER_ADDRESS as unsigned
long.  On every arch for consistency.

Signed-off-by: Kirill A. Shutemov 
Reported-by: Wu Fengguang 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

nios2: drop _PAGE_FILE and pte_file()-related helpers

2015-02-10T22:30:32+00:00

We've replaced remap_file_pages(2) implementation with emulation.  Nobody
creates non-linear mapping anymore.

Signed-off-by: Kirill A. Shutemov 
Cc: Ley Foon Tan 
Reviewed-by: Tobias Klauser 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds