Commit Graph

649 Commits

Author SHA1 Message Date
Linus Torvalds
d79ee93de9 Merge branch 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull scheduler changes from Ingo Molnar:
 "The biggest change is the cleanup/simplification of the load-balancer:
  instead of the current practice of architectures twiddling scheduler
  internal data structures and providing the scheduler domains in
  colorfully inconsistent ways, we now have generic scheduler code in
  kernel/sched/core.c:sched_init_numa() that looks at the architecture's
  node_distance() parameters and (while not fully trusting it) deducts a
  NUMA topology from it.

  This inevitably changes balancing behavior - hopefully for the better.

  There are various smaller optimizations, cleanups and fixlets as well"

* 'sched-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  sched: Taint kernel with TAINT_WARN after sleep-in-atomic bug
  sched: Remove stale power aware scheduling remnants and dysfunctional knobs
  sched/debug: Fix printing large integers on 32-bit platforms
  sched/fair: Improve the ->group_imb logic
  sched/nohz: Fix rq->cpu_load[] calculations
  sched/numa: Don't scale the imbalance
  sched/fair: Revert sched-domain iteration breakage
  sched/x86: Rewrite set_cpu_sibling_map()
  sched/numa: Fix the new NUMA topology bits
  sched/numa: Rewrite the CONFIG_NUMA sched domain support
  sched/fair: Propagate 'struct lb_env' usage into find_busiest_group
  sched/fair: Add some serialization to the sched_domain load-balance walk
  sched/fair: Let minimally loaded cpu balance the group
  sched: Change rq->nr_running to unsigned int
  x86/numa: Check for nonsensical topologies on real hw as well
  x86/numa: Hard partition cpu topology masks on node boundaries
  x86/numa: Allow specifying node_distance() for numa=fake
  x86/sched: Make mwait_usable() heed to "idle=" kernel parameters properly
  sched: Update documentation and comments
  sched_rt: Avoid unnecessary dequeue and enqueue of pushable tasks in set_cpus_allowed_rt()
2012-05-22 18:27:32 -07:00
Linus Torvalds
bf67f3a5c4 Merge branch 'smp-hotplug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull smp hotplug cleanups from Thomas Gleixner:
 "This series is merily a cleanup of code copied around in arch/* and
  not changing any of the real cpu hotplug horrors yet.  I wish I'd had
  something more substantial for 3.5, but I underestimated the lurking
  horror..."

Fix up trivial conflicts in arch/{arm,sparc,x86}/Kconfig and
arch/sparc/include/asm/thread_info_32.h

* 'smp-hotplug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (79 commits)
  um: Remove leftover declaration of alloc_task_struct_node()
  task_allocator: Use config switches instead of magic defines
  sparc: Use common threadinfo allocator
  score: Use common threadinfo allocator
  sh-use-common-threadinfo-allocator
  mn10300: Use common threadinfo allocator
  powerpc: Use common threadinfo allocator
  mips: Use common threadinfo allocator
  hexagon: Use common threadinfo allocator
  m32r: Use common threadinfo allocator
  frv: Use common threadinfo allocator
  cris: Use common threadinfo allocator
  x86: Use common threadinfo allocator
  c6x: Use common threadinfo allocator
  fork: Provide kmemcache based thread_info allocator
  tile: Use common threadinfo allocator
  fork: Provide weak arch_release_[task_struct|thread_info] functions
  fork: Move thread info gfp flags to header
  fork: Remove the weak insanity
  sh: Remove cpu_idle_wait()
  ...
2012-05-21 19:43:57 -07:00
Sam Ravnborg
1edc17832d sparc32: use flushi when run-time patching in per_cpu_patch
Davis S. Miller wrote:
"
The way we do that now is overkill.  We only needed to use the MMU
cache ops when we had sun4c around because sun4c lacked support for
the "flush" instruction.

But all sun4m and later chips have it so we can use it
unconditionally.

So in the per_cpu_patch() code, get rid of the cache ops invocation,
and instead execute a "flush %reg" after each of the instruction patch
assignments, where %reg is set to the address of the instruction that
was stored into.

Perhaps take the flushi() definition from asm/cacheflush_64.h and
place it into asm/cacheflush.h, then you can simply use that.
"

Implemented as per suggestion.
Moved run-time patching before we call paging_init(),
so helper methods in paging_init() may utilise run-time patching too.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-20 13:33:36 -07:00
Sam Ravnborg
3d5f7d37c8 sparc32: drop unused functions in pgtsrmmu.h
One function was only used by leon - move it to a leon specific file.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-19 23:27:39 -07:00
Sam Ravnborg
f6678d3b41 sparc32,leon: remove duplicate definitions in leon.h
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Cc: Konrad Eisele <konrad@gaisler.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-19 23:27:37 -07:00
Sam Ravnborg
123521e414 sparc32,leon: remove duplicate UART register definitions
The registers are defined in leon_amba too.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Cc: Konrad Eisele <konrad@gaisler.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-19 23:27:37 -07:00
Sam Ravnborg
28b7723b39 sparc32,leon: move leon ASI definitions to asi.h
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Cc: Konrad Eisele <konrad@gaisler.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-19 23:27:36 -07:00
David S. Miller
97b5cf9500 sparc32: Remove asm/sysen.h header.
Defines a sun4c register, thus completely unused.

Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-19 21:55:49 -07:00
David S. Miller
4f722a62aa sparc32: Delete asm/smpprim.h
Completely unused.

Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-19 21:51:02 -07:00
David S. Miller
a11b246a48 sparc32: Remove unused empty_bad_page{,_table} declarations.
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-19 21:45:08 -07:00
David S. Miller
837ebf0ec7 sparc32: Kill boot_cpu_id4
It is written, but never actually read.

Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-19 21:40:50 -07:00
David S. Miller
0bfcee9ad3 sparc32: Move GET_PROCESSOR*_ID() out of asm/asmmacro.h
GET_PROCESSOR4D_ID is completely unused, so delete it.

Move GET_PROCESSOR4M_ID to the sun4m specific trap code
which uses it.

We now no longer need to include asm/asi.h

Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-19 21:22:11 -07:00
David S. Miller
d0be6b16c3 sparc32: Remove completely unused code from asm/cache.h
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-19 21:15:37 -07:00
Sam Ravnborg
70168dfa1c sparc32: cleanup mm/fault_32.c
- remove unused variables
- fix coding style issues that hurts my eyes

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-15 10:43:48 -07:00
David S. Miller
c7020eb466 sparc32: Remove cypress cpu support.
It's the one aberration in v8, the only cpu that
didn't actually have hardware multiply and divide
instructions.

Signed-off-by: David S. Miller <davem@davemloft.net>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
2012-05-15 10:22:00 -07:00
David S. Miller
834b97f154 sparc64: Remove pointless assignment in floppy support.
Reported-by: Josip Rodin <joy@entuzijast.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-14 20:59:25 -07:00
David S. Miller
3bd7df8a3e sparc32: Kill unused hard_smp{4m,4d,leon}_processor_id() inlined.
Reported-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-14 14:23:57 -07:00
Sam Ravnborg
50544bce4c sparc32: remove runtime btfix support
- remove all uses of btfixup header
- remove the btfixup header
- remove the btfixup code

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-14 14:05:09 -07:00
Sam Ravnborg
08c9388f58 sparc32: remove remaining users of btfixup
Use sparc_config to hold the last two function pointers.  There was no
point generating dedicated _ops structures only for these.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-14 14:05:08 -07:00
Sam Ravnborg
4ba22b16bb sparc32: move smp ipi to method ops
I ended up renaming set_cpu_int to send_ipi to
be consistent all way around.
send_ipi was moved to the *_smp.c files so
we could call the relevant method direct,
without any _ops indirection.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-14 14:05:07 -07:00
David S. Miller
c68e5d39a5 sparc32: Implement hard_smp_processor_id() via instruction patching.
This is the last non-trivial user of btfixup.

Like sparc64, use a special patch section to resolve the various
implementations of how to read the current CPU's ID when we don't
have current_thread_info()->cpu necessarily available.

Signed-off-by: David S. Miller <davem@davemloft.net>
Tested-by: Sam Ravnborg <sam@ravnborg.org>
2012-05-14 13:31:38 -07:00
David S. Miller
5d83d66635 sparc32: Move cache and TLB flushes over to method ops.
This eliminated most of the remaining users of btfixup.

There are some complications because of the special cases we
have for sun4d, leon, and some flavors of viking.

It was found that there are no cases where a flush_page_for_dma
method was not hooked up to something, so the "noflush" iommu
methods were removed.

Add some documentation to the viking_sun4d_smp_ops to describe exactly
the hardware bug which causes us to need special TLB flushing on
sun4d.

Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-13 20:49:31 -07:00
David S. Miller
d894d964ff sparc32: Convert mmu_* interfaces from btfixup to method ops.
This set of changes displays one major danger of btfixup, interface
signatures are not always type checked fully.  As seen here the iounit
variant of the map_dma_area routine had an incorrect type for one of
it's arguments.

It turns out to be harmless in this case, but just imagine trying to
debug something involving this kind of problem.  No thanks.

Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-13 13:57:05 -07:00
David S. Miller
679bea5e43 sparc: Kill mmu_{un,}lockarea().
These were used on sun4c during floppy data transfers since on that
chip we had to lock the cpu mappings into the TLB because we cannot
take a TLB miss during the assembler floppy interrupt handler that
does the data transfer.

That is no longer necessary since we've removed sun4c support, thus
this stuff can disappear completely.

Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-13 13:23:16 -07:00
David S. Miller
f613914efc sparc32: Un-btfixup update_mmu_cache().
The magic Swift SRMMU code in question has not been enabled for
something on the order of a decade, and it as well as it's comment
is there in the history in case we ever need it again.

Therefore all implementations are NOPs and we can kill this stuff
off.

Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-13 13:16:39 -07:00
David S. Miller
73c1377da9 sparc32: Kill btfixup for xchg()'s 'swap' instruction.
We always have this instruction available, so no need to use
btfixup for it any more.

This also eradicates the whole of atomic_32.S and thus the
__atomic_begin and __atomic_end symbols completely.

Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-13 13:07:16 -07:00
Sam Ravnborg
fb6f66f405 sparc32: drop btfixup in page_32.h
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-13 12:51:55 -07:00
Sam Ravnborg
ff14c07327 sparc32: drop unused prototype from timer_32.h
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-13 12:51:54 -07:00
Sam Ravnborg
b796c6da51 sparc32: drop btfixup in mmu_context_32.h
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-13 12:51:53 -07:00
Sam Ravnborg
9701b264d3 sparc32: drop btfixup in pgtable_32.h
Only one function left using btfixup.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-13 12:51:53 -07:00
Sam Ravnborg
642ea3ed9c sparc32: drop btfixup in pgalloc_32.h
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-13 12:51:52 -07:00
David S. Miller
301d5bbb52 sparc32: Un-btfixup more PTE constants and PTE ops.
pte_{filei,wrprotecti,mkcleani,mkoldi}
pte_{mkwrite,mkdirty,mkyoung}

Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-12 13:54:58 -07:00
David S. Miller
f755f77a3a sparc32: Un-btfixup pte_{write,dirty,young}i
And we can certainly get rid of the const function attributes, there
is no way that's needed any longer and no other arch uses this kind
of annotation here.

Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-12 13:48:10 -07:00
David S. Miller
62875cff73 sparc32: Un-btfixup set_pte, pte_present, mk_pte{_phys,_io}().
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-12 13:39:23 -07:00
David S. Miller
f167edaee0 sparc32: Un-btfixup pmd_{bad,present}().
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-12 13:30:28 -07:00
David S. Miller
7d9fa4aa3d sparc32: Un-btfixup pgd_{none,bad,present}.
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-12 13:13:16 -07:00
David S. Miller
6439d1c693 sparc32: Un-btfixup PAGE_{NONE,COPY,READONLY,SHARED,KERNEL}.
That lets us also get rid of the run-time initialization of
protection_map[] and all the ugly module workarounds for
PAGE_KERNEL and PAGE_SHARED to deal with the fact that we
can't do btfixups for modular code.

Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-12 12:52:47 -07:00
David S. Miller
3d8273675d sparc32: Un-btfixup pmd_page and pte_pfn.
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-12 12:33:08 -07:00
David S. Miller
a46d6056f6 sparc32: Un-btfixup {pte,pmd,pgd}_clear().
Also we can remove BTFIXUPCALL_SWAPO0G0 as that is no longer
used.

This was rather amusing, we were setting the btfixup vectors
based upon cpu type but all to the same exact generic srmmu
routines.

Furthermore, we were inconsistently marking the fixup as
either BTFIXUPCALL_SWAPO0G0 or BTFIXUPCALL_NORM.

What a mess, glad we could untangle this stuff.

Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-12 12:26:47 -07:00
David S. Miller
3d386c0ef6 sparc32: Un-btfixup PGDIR_{SHIFT,SIZE,MASK} {USER_,}PTRS_PER_{PGD,PMD}
Only one set of values exist, the SRMMU ones.

Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-12 12:02:02 -07:00
Sam Ravnborg
6066fc3dc4 sparc32: drop unused type/extern
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-12 11:32:04 -07:00
Sam Ravnborg
3774348770 sparc32: drop btfixup for check_pgt_cache
It is a noop for srmmu - so use a define as sparc64 does.
And drop all sparc callers - no need to confuse our-self
be calling a noop function.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-12 11:32:04 -07:00
Sam Ravnborg
34d4accfe0 sparc32: drop btfixup for switch_mm
This revealed that the implementation of switch_mm
had a bogus extra argument.
No harm as said argument was never used - but confusing.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-12 11:32:03 -07:00
Sam Ravnborg
144e988dd2 sparc32: code cleanup in floppy glue
Small cleanup to improve readability.
Dropped one test for sparc_cpu_model -
we already know that only sun4m support floppy.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-12 11:32:02 -07:00
Sam Ravnborg
918f832290 sparc32: fix warning in floopy glue
Fix following warning:
arch/sparc/include/asm/floppy_32.h:342:5: warning: 'op' may be used uninitialized in this function

The warning are legitimite and we can end up using op uninitialized.
This fixes build with my gcc on UP.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-12 11:32:01 -07:00
David S. Miller
ee906c9e0b sparc32: Trivial removal of sun4c references in comments.
I left some around, like the ones in the openprom headers, since
we need to think about which pieces of those datastructures and
code we can completely toss now.

Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-12 00:35:45 -07:00
David S. Miller
6e54e9503e sparc32: Remove sun4 and sun4c from enum sparc_cpu.
All the remaining references are trivially removed since we've
just eliminated the final reference to sparc_cpu_model from
assembler code in commit b7d96ce189
("sparc32: Remove sparc_cpu_model read from floppy interrupt handler.")

Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-12 00:23:23 -07:00
David S. Miller
fd2b79b7bf sparc32: Kill unused defines from asm/head_32.h
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-11 21:43:11 -07:00
David S. Miller
0301a6cbcc sparc32: Remove some more sun4c code from floppy glue.
Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-11 21:39:48 -07:00
David S. Miller
db41cf2df6 sparc32: Remove ldXa and stXa defines, unused.
These were for sharing some MMU code between sun4 and sun4c.

Signed-off-by: David S. Miller <davem@davemloft.net>
2012-05-11 21:31:49 -07:00