Commit Graph

80156 Commits

Author SHA1 Message Date
Andi Kleen
68071a9665 x86: remove the now unused X86_FEATURE_SYNC_RDTSC
we need to know whether RDTSC is synchronous or not.

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:32:40 +01:00
Ingo Molnar
92767af0e3 x86: fix sched_clock()
[ andi@firstfloor.org: build fix ]

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:32:40 +01:00
Andi Kleen
6d63de8dbc x86: remove get_cycles_sync
rdtsc is now speculation-safe, so no need for the sync variants of
the APIs.

[ mingo@elte.hu: removed the nsec_barrier() complication. ]

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:32:39 +01:00
Ingo Molnar
f06e4ec1c1 x86: read_tsc sync
make native_read_tsc() always non-speculative.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:32:39 +01:00
Ingo Molnar
e402644013 x86: map vsyscalls early enough
map vsyscalls early enough. This is important if a __vsyscall_fn
function is used by other kernel code too.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:32:39 +01:00
Ingo Molnar
cdc7957d19 x86: move native_read_tsc() offline
move native_read_tsc() offline.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:32:39 +01:00
Andi Kleen
fde1b3fa94 x86: introduce rdtsc_barrier()
rdtsc_barrier() is a new barrier primitive that stops RDTSC speculation
to avoid races with timer interrupts on other CPUs.

It expands either to LFENCE (for Intel CPUs) or MFENCE (for
AMD CPUs) which stops RDTSC on all currently known microarchitectures
that implement SSE. On CPUs without SSE there is generally no RDTSC
speculation.

[ mingo@elte.hu: renamed it to rdtsc_barrier() and made it x86-only ]

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:32:38 +01:00
WANG Cong
2a10e7c412 git-x86: unbreak UML
Acked-by: Jeff Dike <jdike@addtoit.com>
Signed-off-by: WANG Cong <xiyou.wangcong@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:32:38 +01:00
Andi Kleen
bd61643ef6 x86: move nop declarations into separate include file
Moving things out of processor.h is always a good thing.

Also needed to avoid include loop in later patch.

Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:32:38 +01:00
Ingo Molnar
6d5f718a49 x86: lfence fix
LFENCE is available on XMM2 or higher Intel CPUs - not XMM or higher...

this caused boot failures on XMM1 & !XMM1 capable CPUs.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:32:38 +01:00
Andi Kleen
707fa8ed92 x86: Implement support to synchronize RDTSC with LFENCE on Intel CPUs
According to Intel RDTSC can be always synchronized with LFENCE
on all current CPUs. Implement the necessary CPUID bit for that.

It is unclear yet if that is true for all future CPUs too,
but if there's another way the kernel can be always updated.

Cc: asit.k.mallick@intel.com
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:32:37 +01:00
Andi Kleen
de4218634e x86: implement support to synchronize RDTSC through MFENCE on AMD CPUs
According to AMD RDTSC can be synchronized through MFENCE.
Implement the necessary CPUID bit for that.

Cc: andreas.herrmann3@amd.com
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:32:37 +01:00
Andi Kleen
27efeb6771 x86: make ptrace.h safe to include from assembler code
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:32:36 +01:00
Carlos R. Mafra
3aa88cdf6b x86: clean up k8topology.c
This patch fixes all errors pointed out by checkpatch.pl.

                                      errors   lines of code   errors/KLOC
arch/x86/mm/k8topology_64.c (before)      72             185         389.1
arch/x86/mm/k8topology_64.c (after)        0             185             0

No code changed.

   text    data     bss     dec     hex filename
   1506       0       0    1506     5e2 k8topology_64.o.after
   1506       0       0    1506     5e2 k8topology_64.o.before

md5sum:

   f9f48331a7eca4fc60d2a03369dc5f53  k8topology_64.o.after
   f9f48331a7eca4fc60d2a03369dc5f53  k8topology_64.o.before

Signed-off-by: Carlos R. Mafra <crmafra@gmail.com>

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:32:36 +01:00
Hiroshi Shimamoto
ff8a03a623 x86: clean up apic_32.c, take 2
More white space and coding style clean up.

Signed-off-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:32:36 +01:00
Ingo Molnar
f2633105cd x86: debug: double-check the empty zero page
temporary debugging - remove before this hits v2.6.25.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:32:36 +01:00
Yinghai Lu
48ddb154cf x86: not clear empty_zero_page again
empty_zero_page is in .bss section, and it is cleared in clear_bss by
x86_64_start_kernel(). So don't clear that again in mem_init

Signed-off-by: Yinghai Lu <yinghai.lu@sun.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:32:36 +01:00
Hiroshi Shimamoto
e83a5fdca8 x86: clean up apic_32/64.c
White space and coding style clean up.
Make apic_32/64.c similar.

Signed-off-by: Hiroshi Shimamoto <h-shimamoto@ct.jp.nec.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:32:35 +01:00
Harvey Harrison
c4aba4a8ec x86: introduce force_sig_info_fault helper to X86_64
Use the force_sig_info_fault helper from X86_32 in X86_64.

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:32:35 +01:00
Harvey Harrison
1dc85be087 x86: begin fault_{32|64}.c unification
Move X86_32 only get_segment_eip to X86_64
Move X86_64 only is_errata93 to X86_32

Change X86_32 loop in is_prefetch to highlight the differences
between them.  Fold the logic from __is_prefetch in as well on
X86_32.

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:32:35 +01:00
Harvey Harrison
b6795e65f1 x86: fault_32.c cleanup
We get die() from kdebug.h, no need for forward declaration.

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:32:34 +01:00
Carlos R. Mafra
b75f53dba8 x86: fix style errors in nmi_int.c
This patch fixes most errors detected by checkpatch.pl.

                                     errors   lines of code   errors/KLOC
arch/x86/oprofile/nmi_int.c (after)       1             461           2.1
arch/x86/oprofile/nmi_int.c (before)     60             477         125.7

No code changed.

size:
   text    data     bss     dec     hex filename
   2675     264     472    3411     d53 nmi_int.o.after
   2675     264     472    3411     d53 nmi_int.o.before

md5sum:
  847aea0cc68fe1a2b5e7019439f3b4dd  nmi_int.o.after
  847aea0cc68fe1a2b5e7019439f3b4dd  nmi_int.o.before

Signed-off-by: Carlos R. Mafra <crmafra@gmail.com>
Reviewed-by: Jesper Juhl <jesper.juhl@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:32:33 +01:00
Quentin Barnes
b506a9d08b x86: code clarification patch to Kprobes arch code
When developing the Kprobes arch code for ARM, I ran across some code
found in x86 and s390 Kprobes arch code which I didn't consider as
good as it could be.

Once I figured out what the code was doing, I changed the code
for ARM Kprobes to work the way I felt was more appropriate.
I've tested the code this way in ARM for about a year and would
like to push the same change to the other affected architectures.

The code in question is in kprobe_exceptions_notify() which
does:
====
          /* kprobe_running() needs smp_processor_id() */
          preempt_disable();
          if (kprobe_running() &&
              kprobe_fault_handler(args->regs, args->trapnr))
                  ret = NOTIFY_STOP;
          preempt_enable();
====

For the moment, ignore the code having the preempt_disable()/
preempt_enable() pair in it.

The problem is that kprobe_running() needs to call smp_processor_id()
which will assert if preemption is enabled.  That sanity check by
smp_processor_id() makes perfect sense since calling it with preemption
enabled would return an unreliable result.

But the function kprobe_exceptions_notify() can be called from a
context where preemption could be enabled.  If that happens, the
assertion in smp_processor_id() happens and we're dead.  So what
the original author did (speculation on my part!) is put in the
preempt_disable()/preempt_enable() pair to simply defeat the check.

Once I figured out what was going on, I considered this an
inappropriate approach.  If kprobe_exceptions_notify() is called
from a preemptible context, we can't be in a kprobe processing
context at that time anyways since kprobes requires preemption to
already be disabled, so just check for preemption enabled, and if
so, blow out before ever calling kprobe_running().  I wrote the ARM
kprobe code like this:
====
          /* To be potentially processing a kprobe fault and to
           * trust the result from kprobe_running(), we have
           * be non-preemptible. */
          if (!preemptible() && kprobe_running() &&
              kprobe_fault_handler(args->regs, args->trapnr))
                  ret = NOTIFY_STOP;
====

The above code has been working fine for ARM Kprobes for a year.
So I changed the x86 code (2.6.24-rc6) to be the same way and ran
the Systemtap tests on that kernel.  As on ARM, Systemtap on x86
comes up with the same test results either way, so it's a neutral
external functional change (as expected).

This issue has been discussed previously on linux-arm-kernel and the
Systemtap mailing lists.  Pointers to the by base for the two
discussions:
http://lists.arm.linux.org.uk/lurker/message/20071219.223225.1f5c2a5e.en.html
http://sourceware.org/ml/systemtap/2007-q1/msg00251.html

Signed-off-by: Quentin Barnes <qbarnes@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Ananth N Mavinakayahanalli <ananth@in.ibm.com>
Acked-by: Ananth N Mavinakayahanalli <ananth@in.ibm.com>
2008-01-30 13:32:32 +01:00
Cyrill Gorcunov
3f4380a1e0 x86: get rid of checkpatch.pl complains on apm_32.c
This patch eliminates most of code-style errors
discovered by checkpatch.pl on arch/x86/kernel/apm_32.c

no code changed:

      text    data     bss     dec     hex filename
     12142    1837      84   14063    36ef apm_32.o.before
     12142    1837      84   14063    36ef apm_32.o.after

   md5:
       2676b881ad55e387da4a995e8b9ee372  apm_32.o.before.asm
       2676b881ad55e387da4a995e8b9ee372  apm_32.o.after.asm

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:32:32 +01:00
Adrian Bunk
1c858087cd x86: default to PCI=y
PCI is one of the few hardware stuff where defaulting to y makes sense.

Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:32:32 +01:00
Sam Ravnborg
037f52aca4 x86: gitignore arch/x86/vdso files
Teach git to ignore generated files in
arch/x86/vdso/*

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Cc: Roland McGrath <roland@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:32:32 +01:00
Cyrill Gorcunov
8eed926053 x86: coding style cleanup for kernel/bootflag.c
This patch eliminates checkpatch.pl complaints on bootflag.c

No code changed:

   text    data     bss     dec     hex filename
    321       8       0     329     149 bootflag.o.before
    321       8       0     329     149 bootflag.o.after

   md5:
      9c1b474bcf25ddc1724a29c19880043f  bootflag.o.before.asm
      9c1b474bcf25ddc1724a29c19880043f  bootflag.o.after.asm

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:32:31 +01:00
Ingo Molnar
ff3cf85612 x86: hlt on early crash
H. Peter Anvin <hpa@zytor.com> wrote:

> It probably should actually HLT, to avoid sucking power, and stressing
> the thermal system.  We're dead at this point, and the early 486's
> which had problems with HLT will lock up - we don't care.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:32:31 +01:00
Andrew Morton
39657b6546 git-x86: drivers/pnp/pnpbios/bioscalls.c build fix
drivers/pnp/pnpbios/bioscalls.c:64: warning: (near initialization for 'bad_bios_desc.<anonymous>')

Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:32:31 +01:00
Nick Piggin
fb0328e2e6 x86: reduce CONFIG_X86_PPRO_FENCE bloat
CONFIG_X86_PPRO_FENCE bloats text:

i386 allmodconf: size mm/built-in.o
           text    data     bss     dec     hex         text ratio
vanilla: 163082   20372   40120  223574   36956          100.00%
bugfix : 163509   20372   40120  224001   36b01            0.26%
noppro : 162191   20372   40120  222683   365db         -  0.55%
both   : 162267   20372   40120  222759   36627         -  0.50% (+0.05% vs noppro)

So with the ppro memory ordering bug out of the way, the PG_uptodate fix
only adds 76 bytes of text.

allow this config to be specified by distros.

[ mingo@elte.hu: x86.git merge ]

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:32:31 +01:00
Sam Ravnborg
583d0e90ea x86: unify arch/x86/lib/Makefile(s)
Trivial unification of Makefiles for the
x86 specific library part.
Linking order is slightly modified but should be harmless.

Tested doing a defconfig build before and after and saw
no build changes.

It adds almost as many lines as it deletes - bacause
I broke a few lines up fo readability in the Makefile.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:32:31 +01:00
Sam Ravnborg
db569afa4e x86: unify arch/x86/boot/compressed/Makefile(s)
Trivial unification of the two Makefiles.
Tested doing a defconfig build for both 32 and 64 bit and
no build changes occured.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:32:30 +01:00
Sam Ravnborg
6b0c3d44d3 x86: unify arch/x86/kernel/Makefile(s)
Combine the 32 and 64 bit specific Makefiles in one file.
While doing so link order was (almost) preserved on 32 bit
but on 64 bit link order changed a lot.

Patch was checked with defconfig + allyesconfig builds.
The same .o files were linked in these configurations.

To keep readability of the Makefiles a few Kconfig
symbols was added/modified and it was checked that
they were not used anywhere else.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:32:27 +01:00
Sam Ravnborg
d531b4fd2f x86: teach vdso to clean
A few files remained after 'make clean' in arch/x86/vdso/.
Teach vdso to clean up those files in a bit brutal fashion.
The filenames are just hardcoded in the Makefile.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Cc: Roland McGrath <roland@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:32:27 +01:00
Sam Ravnborg
4ba7e5cd49 x86: biarch support for 32 bit builds beautified
There were no reason to mess around with CC, AS and LD.
Fixing this up avoided duplicated option for ld.

A small fixlet were needed in boot/Makefile which assumed
that CC were modified.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:32:23 +01:00
Sam Ravnborg
25dfeeb757 x86: share more options between 32 and 64 bit build
On recommendation from Andi Kleen share a few more options
between 32 and 64 bit builds.
A defconfig build for i386 did not show any difference in
size of text and data.

The additional shared options are:
-Wno-sign-compare
-fno-asynchronous-unwind-tables
-mno-sse
-mno-mmx
-mno-sse2
-mno-3dnow

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Andi Kleen <ak@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:32:21 +01:00
Sam Ravnborg
0a6ef376d4 x86: unification of arch/x86/Makefiles
Unify the 32 and 64 bit specific Makefiles.
The unification was simplest to do in one step although the
readability of the patch suffers a bit from this.

Noteworthy remarks on the unification:
- The 64 bit cpu stuff should be moved to Makefile_32.cpu
  but I did not feel confident doing it due to subtle differences
- The use of cflags-y were abandoned since we have seen one bug where
  we did wrong due to missing assignment to KBUILD_CFLAGS.
  The cc-option marcro uses KBUILD_CFLAGS.
- The "No need to remake" line are deleted. It caused "make -B" to fail
- For 64 bit the sub architecture stuff is not used.
- The way head64.o is specified could be nicer - but it awaits the
  introduction of head32.o (which seems like a win to introduce for readability)
- Patch is checkpatch clean

Patch is tested by doing a defconfig build for i386 and x86_64 and in both
cases monitoring that only relevant files were recompiled when applying
the patch.

[ mingo@elte.hu: build fix ]

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Andi Kleen <ak@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:32:20 +01:00
Harvey Harrison
b976015637 x86: kprobes change kprobe_handler flow
Make the control flow of kprobe_handler more obvious.

Collapse the separate if blocks/gotos with if/else blocks
this unifies the duplication of the check for a breakpoint
instruction race with another cpu.

Create two jump targets:
	preempt_out: re-enables preemption before returning ret
	out: only returns ret

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:32:19 +01:00
Harvey Harrison
33cb524383 x86: cosmetic fixes fault_{32|64}.c
First step towards unifying these files.
- Checkpatch trailing whitespace fixes
- Checkpatch indentation of switch statement fixes
- Checkpatch single statement ifs need no braces fixes
- Checkpatch consistent spacing after comma fixes
- Introduce defines for pagefault error bits from X86_64 and add useful
  comment from X86_32.  Use these defines in X86_32 where obvious.
- Unify comments between 32|64 bit
- Small ifdef movement for CONFIG_KPROBES in notify_page_fault()
- Introduce X86_64 only case statement

No Functional Changes.

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:32:19 +01:00
Julia Lawall
1d16b53e38 arch/x86/kernel/io_apic_{64,32}.c: use time_before
The functions time_before, time_before_eq, time_after, and time_after_eq
are more robust for comparing jiffies against other values.

A simplified version of the semantic patch making this change is as follows:
(http://www.emn.fr/x-info/coccinelle/)

// <smpl>
@ change_compare_np @
expression E;
@@

(
- jiffies <= E
+ time_before_eq(jiffies,E)
|
- jiffies >= E
+ time_after_eq(jiffies,E)
|
- jiffies < E
+ time_before(jiffies,E)
|
- jiffies > E
+ time_after(jiffies,E)
)

@ include depends on change_compare_np @
@@

#include <linux/jiffies.h>

@ no_include depends on !include && change_compare_np @
@@

  #include <linux/...>
+ #include <linux/jiffies.h>
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:32:19 +01:00
Julia Lawall
4f2479f03c arch/x86/kernel/apm_32.c: use time_before, time_before_eq,
The functions time_before, time_before_eq, time_after, and time_after_eq
are more robust for comparing jiffies against other values.

A simplified version of the semantic patch making this change is as follows:
(http://www.emn.fr/x-info/coccinelle/)

// <smpl>
@ change_compare_np @
expression E;
@@

(
- jiffies <= E
+ time_before_eq(jiffies,E)
|
- jiffies >= E
+ time_after_eq(jiffies,E)
|
- jiffies < E
+ time_before(jiffies,E)
|
- jiffies > E
+ time_after(jiffies,E)
)

@ include depends on change_compare_np @
@@

#include <linux/jiffies.h>

@ no_include depends on !include && change_compare_np @
@@

  #include <linux/...>
+ #include <linux/jiffies.h>
// </smpl>

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:32:18 +01:00
Julia Lawall
e5fc316196 arch/x86/ia32: use time_before, time_before_eq, etc.
The functions time_before, time_before_eq, time_after, and time_after_eq
are more robust for comparing jiffies against other values.

A simplified version of the semantic patch making this change is as follows:
(http://www.emn.fr/x-info/coccinelle/)

// <smpl>
@ change_compare_np @
expression E;
@@

(
- jiffies <= E
+ time_before_eq(jiffies,E)
|
- jiffies >= E
+ time_after_eq(jiffies,E)
|
- jiffies < E
+ time_before(jiffies,E)
|
- jiffies > E
+ time_after(jiffies,E)
)

@ include depends on change_compare_np @
@@

#include <linux/jiffies.h>

@ no_include depends on !include && change_compare_np @
@@

  #include <linux/...>
+ #include <linux/jiffies.h>
// </smpl>

[ mingo@elte.hu: merge to x86.git ]

Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:32:17 +01:00
Harvey Harrison
31f80e45ea x86: kprobes remove fix_riprel #ifdef
Move #ifdef around function definiton into the function and
unconditionally return on X86_32.  Saves an ifdef from the
one callsite.

[ mingo@elte.hu: minor cleanup. ]

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:32:16 +01:00
Harvey Harrison
9930927f36 x86: introduce REX prefix helper for kprobes
Fold some small ifdefs into a helper function.

Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:32:14 +01:00
Andrew Morton
e419190683 x86: arch/x86/math-emu/errors.c: fix printk warnings
arch/x86/math-emu/errors.c:163: warning: format '%ld' expects type 'long int', but argument 3 has type 'u32'
arch/x86/math-emu/errors.c:175: warning: format '%ld' expects type 'long int', but argument 3 has type 'u32'
arch/x86/math-emu/errors.c:175: warning: format '%ld' expects type 'long int', but argument 4 has type 'u32'
arch/x86/math-emu/errors.c:175: warning: format '%ld' expects type 'long int', but argument 5 has type 'u32'
arch/x86/math-emu/errors.c:175: warning: format '%ld' expects type 'long int', but argument 6 has type 'u32'

Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:32:13 +01:00
Andrew Morton
7271339347 x86: arch/x86/kernel/cpu/mcheck/k7.c checkpatch fixes
#88: FILE: arch/x86/kernel/cpu/mcheck/k7.c:34:
+		rdmsr(MSR_IA32_MC0_STATUS+i*4,low, high);
 		                             ^

ERROR: need space after that ',' (ctx:VxV)
#142: FILE: arch/x86/kernel/cpu/mcheck/p4.c:170:
+		rdmsr(MSR_IA32_MC0_STATUS+i*4,low, high);
 		                             ^

ERROR: need space after that ',' (ctx:VxV)
#180: FILE: arch/x86/kernel/cpu/mcheck/p6.c:34:
+		rdmsr(MSR_IA32_MC0_STATUS+i*4,low, high);
 		                             ^

total: 3 errors, 0 warnings, 114 lines checked

Your patch has style problems, please review.  If any of these errors
are false positives report them to the maintainer, see
CHECKPATCH in MAINTAINERS.

Please run checkpatch prior to sending patches

Cc: Min Zhang <mzhang@mvista.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:32:13 +01:00
Andrew Morton
b912a1c737 x86: arch/x86/kernel/cpu/mcheck/ checkpatch fixes
#40: FILE: arch/x86/kernel/cpu/mcheck/k7.c:46:
+				snprintf (misc, 20, "[%08x%08x]", ahigh, alow);

WARNING: line over 80 characters
#45: FILE: arch/x86/kernel/cpu/mcheck/k7.c:50:
+				snprintf (addr, 24, " at %08x%08x", ahigh, alow);

WARNING: no space between function name and open parenthesis '('
#45: FILE: arch/x86/kernel/cpu/mcheck/k7.c:50:
+				snprintf (addr, 24, " at %08x%08x", ahigh, alow);

WARNING: no space between function name and open parenthesis '('
#48: FILE: arch/x86/kernel/cpu/mcheck/k7.c:52:
+			printk (KERN_EMERG "CPU %d: Bank %d: %08x%08x%s%s\n",

WARNING: no space between function name and open parenthesis '('
#65: FILE: arch/x86/kernel/cpu/mcheck/p4.c:161:
+		printk (KERN_DEBUG "CPU %d: EIP: %08x EFLAGS: %08x\n"

WARNING: no space between function name and open parenthesis '('
#88: FILE: arch/x86/kernel/cpu/mcheck/p4.c:182:
+				snprintf (misc, 20, "[%08x%08x]", ahigh, alow);

WARNING: line over 80 characters
#93: FILE: arch/x86/kernel/cpu/mcheck/p4.c:186:
+				snprintf (addr, 24, " at %08x%08x", ahigh, alow);

WARNING: no space between function name and open parenthesis '('
#93: FILE: arch/x86/kernel/cpu/mcheck/p4.c:186:
+				snprintf (addr, 24, " at %08x%08x", ahigh, alow);

WARNING: no space between function name and open parenthesis '('
#96: FILE: arch/x86/kernel/cpu/mcheck/p4.c:188:
+			printk (KERN_EMERG "CPU %d: Bank %d: %08x%08x%s%s\n",

WARNING: no space between function name and open parenthesis '('
#120: FILE: arch/x86/kernel/cpu/mcheck/p6.c:46:
+				snprintf (misc, 20, "[%08x%08x]", ahigh, alow);

WARNING: line over 80 characters
#125: FILE: arch/x86/kernel/cpu/mcheck/p6.c:50:
+				snprintf (addr, 24, " at %08x%08x", ahigh, alow);

WARNING: no space between function name and open parenthesis '('
#125: FILE: arch/x86/kernel/cpu/mcheck/p6.c:50:
+				snprintf (addr, 24, " at %08x%08x", ahigh, alow);

WARNING: no space between function name and open parenthesis '('
#128: FILE: arch/x86/kernel/cpu/mcheck/p6.c:52:
+			printk (KERN_EMERG "CPU %d: Bank %d: %08x%08x%s%s\n",

total: 0 errors, 13 warnings, 100 lines checked

Your patch has style problems, please review.  If any of these errors
are false positives report them to the maintainer, see
CHECKPATCH in MAINTAINERS.

Please run checkpatch prior to sending patches

Cc: Min Zhang <mzhang@mvista.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:32:12 +01:00
Min Zhang
9e8b6d90ac arch/x86/kernel/cpu/mcheck/p4.c: cleanups
SMP, the machine check exception dispatches all logical processors within a
physical package to the machine-check exception handler, so the printk
within each handler outputs concurrently and makes the output unreadable.
Refer to Intel system programming guide Part 1 Section 7.8.5
http://developer.intel.com/design/processor/manuals/253668.pdf

Signed-off-by: Min Zhang <mzhang@mvista.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:32:11 +01:00
Huang, Ying
8b2cb7a8f5 x86: 32-bit EFI runtime service support: fixes in sync with 64-bit support
support according to fixes of x86_64 support.

- Delete efi_rt_lock because it is used during system early boot,
  before SMP is initialized.

- Change local_flush_tlb() to __flush_tlb_all() to flush global page
  mapping.

- Clean up includes.

- Revise Kconfig description.

- Enable noefi kernel parameter on i386.

Signed-off-by: Huang Ying <ying.huang@intel.com>
Cc: Andi Kleen <ak@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:32:11 +01:00
Glauber de Oliveira Costa
bfd074e05b replace x86_read/write_per_cpu with a common function.
x86_read_per_cpu() and its writeish sister are not present in x86_64. So in
this patch, we replace them with __get_cpu_var(), which is present in both

Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-01-30 13:32:11 +01:00