linux.git/arch/openrisc/kernel/entry.S, branch v3.10

Merge branch 'for-upstream' of git://openrisc.net/jonas/linux

2013-02-27T03:46:23+00:00

Pull OpenRISC updates from Jonas Bonn:
 "An equal number of bug fixes and trivial cleanups; no new features.

   - Two patches to fix errors thrown by the updated toolchain.

   - Three other bug fixes.

   - Four trivial cleanups."

* 'for-upstream' of git://openrisc.net/jonas/linux:
  openrisc: add missing header inclusion
  openrisc: really pass correct arg to schedule_tail
  Add bitops include needed for ext2 filesystem
  openrisc: update DTLB-miss handler last
  openrisc: fix up vmalloc page table loading
  openrisc idle: delete pm_idle
  openrisc: remove CONFIG_SYMBOL_PREFIX
  openrisc: avoid using function parameter regs in reset vector
  openrisc: remove unused current_regs

openrisc: really pass correct arg to schedule_tail

2013-02-17T07:46:21+00:00

Commit 287ad220cd8b5a9d29f71c78f6e4051093f051fc tried to set up the argument
to schedule_tail, but ended up using TI_STACK which isn't a defined symbol.
Sadly, the old openrisc compiler silently ignores this fact and it was first
discovered now when building with an updated toolchain.

Reported-by: Christian Svensson 
Signed-off-by: Jonas Bonn

openrisc: fix up vmalloc page table loading

2013-02-14T15:39:26+00:00

vmalloc'ed pages are faulted into a process' page tables on demand.  In
order to facilitate this, do_page_fault needs to know whether it was
called via a page fault exception or a TLB-miss exception.

This patch adds a wrapper around the _x_page_fault_handler entry points
that the TLB-miss exceptions can call into in order to have the relevant
parameter set to satisfy do_page_fault.

This fixes a bug and is "good enough" for now.  That said, this whole
handling of vmalloc needs to be audited for correctness at some point.

Signed-off-by: Jonas Bonn

openrisc: switch to generic sigaltstack

2013-02-03T23:16:05+00:00

Signed-off-by: Al Viro

openrisc: switch to use of generic fork and clone

2012-11-29T04:43:40+00:00

Signed-off-by: Al Viro

openrisc: use generic sys_execve

2012-10-19T16:33:01+00:00

Signed-off-by: Jonas Bonn

openrisc: use generic kernel_thread/kernel_execve

2012-10-19T16:32:36+00:00

Signed-off-by: Jonas Bonn

openrisc: pass correct arg to schedule_tail

2012-10-19T16:32:36+00:00

schedule_tail() requires that the 'prev' task be passed as an argument
to it.  This arg is set in _switch, just before 'returning' to one of
the ret_* functions where schedule_tail is invoked.

Signed-off-by: Jonas Bonn

openrisc: use scratch regs in atomic syscall

2012-05-08T09:43:59+00:00

The function sys_or1k_atomic was using call-saved registers without
restoring their value before returning.  This is a faux pas: either
we need to restore their values or use scratch regs; the latter is
less code so that's the route this patch takes.

Thanks to David Hennerström for doing most of the heavy-lifting in
tracking this one down.

Reported-by: Davd Hennerström 
Signed-off-by: Jonas Bonn

openrisc: sanitize use of orig_gpr11

2012-03-06T09:37:00+00:00

The pt_regs struct had both a 'syscallno' field and an 'orig_gpr11' field
and it wasn't really clear how these were supposed to be used.  This patch
removes the syscallno field altogether and makes orig_gpr11 work more
like other architectures: keep track of syscall number in progress or
hold -1 for non-syscall exceptions.

Signed-off-by: Jonas Bonn