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As noted by David:
pte_page() is a macro defined as follows;
include/asm-sh/pgtable.h
#define pte_page(x) phys_to_page(pte_val(x)&PTE_PHYS_MASK)
include/asm-sh/page.h
#define phys_to_page(phys) (pfn_to_page(phys >> PAGE_SHIFT))
So as you can see the phys_to_page() macro doesn't wrap the 'phys'
parameter in parentheses so we end up with;
pte_val(x)&PTE_PHYS_MASK >> PAGE_SHIFT
Which is not what we wanted as '>>' has a higher precedence than bitwise
AND. I dug into the git repository and I believe this bug was added with
this commit (104b8deaa5c0144cccfc7d914413ff80c7176af1);
2006-03-27 KAMEZAWA Hiroyuki [PATCH] unify pfn_to_page: sh pfn_to_page
-#define phys_to_page(phys) (mem_map + (((phys)-__MEMORY_START) >>
PAGE_SHIFT))
-#define page_to_phys(page) (((page - mem_map) << PAGE_SHIFT) +
__MEMORY_START)
+#define phys_to_page(phys) (pfn_to_page(phys >> PAGE_SHIFT))
+#define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
Reported-by: David ADDISON <david.addison@st.com>
Reported-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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Remove reference to out of date/rotting websites.
Signed-off-by: Adrian McMenamin <adrian@mcmen.demon.co.uk>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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This patch adds support for the ax88796 driver on highlander boards.
Implemented using the 93cx6 EEPROM support introduced by commit-id
89e536a190f90d038bae7905a0c582cb7089b739.
Signed-off-by: Magnus Damm <damm@igel.co.jp>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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* 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus: (34 commits)
[MIPS] tb0219: Update copyright message.
[MIPS] MT: Fix bug in multithreaded kernels.
[MIPS] Alchemy: Remove CONFIG_TS_AU1X00_ADS7846 from defconfigs.
Author: Ralf Baechle <ralf@linux-mips.org>
[MIPS] sb1250: Enable GenBus IDE in defconfig.
[MIPS] vmlinux.ld.S: correctly indent .data section
[MIPS] c-r3k: Implement flush_cache_range()
[MIPS] Store sign-extend register values for PTRACE_GETREGS
[MIPS] Alchemy: Register platform devices
[MIPS] Add len and addr validation for MAP_FIXED mappings.
[MIPS] IRIX: Fix off-by-one error in signal compat code.
[MIPS] time: Replace plat_timer_setup with modern APIs.
[MIPS] time: Fix cut'n'paste bug in Sibyte clockevent driver.
[MIPS] time: Make c0_compare_int_usable faster
[MIPS] time: Fix cevt-r4k.c for 64-bit kernel
[MIPS] Sibyte: Delete {sb1250,bcm1480}_steal_irq().
[MIPS] txx9tmr clockevent/clocksource driver
[MIPS] Add mips_hpt_frequency check to mips_clockevent_init().
[MIPS] IP32: Fixes after interrupt renumbering.
[MIPS] IP27: Fix slice logic to work for arbitrary number of slices.
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* git://git.kernel.org/pub/scm/linux/kernel/git/mingo/linux-2.6-sched:
sched: fix style in kernel/sched.c
sched: fix style of swap() macro in kernel/sched_fair.c
sched: report CPU usage in CFS cgroup directories
sched: move rcu_head to task_group struct
sched: fix incorrect assumption that cpu 0 exists
sched: keep utime/stime monotonic
sched: make kernel/sched.c:account_guest_time() static
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This reverts commit 2e1c49db4c640b35df13889b86b9d62215ade4b6.
First off, testing in Fedora has shown it to cause boot failures,
bisected down by Martin Ebourne, and reported by Dave Jobes. So the
commit will likely be reverted in the 2.6.23 stable kernels.
Secondly, in the 2.6.24 model, x86-64 has now grown support for
SPARSEMEM_VMEMMAP, which disables the relevant code anyway, so while the
bug is not visible any more, it's become invisible due to the code just
being irrelevant and no longer enabled on the only architecture that
this ever affected.
Reported-by: Dave Jones <davej@redhat.com>
Tested-by: Martin Ebourne <fedora@ebourne.me.uk>
Cc: Zou Nan hai <nanhai.zou@intel.com>
Cc: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Andy Whitcroft <apw@shadowen.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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fallout of recent commits: small coding style fixes.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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fix style of swap() macro in kernel/sched_fair.c.
( this macro should eventually move to a general header, as ext3 uses
a similar construct too. )
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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Adds a cpu.usage file to the CFS cgroup that reports CPU usage in
milliseconds for that cgroup's tasks
[ mingo@elte.hu: style cleanups. ]
Signed-off-by: Paul Menage <menage@google.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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Peter Zijlstra noticed that the rcu_head object need not be present
in every cfs_rq of a group. Move it to the task_group structure
instead.
Signed-off-by: Srivatsa Vaddagiri <vatsa@linux.vnet.ibm.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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This patch:
commit 9b5b77512dce239fa168183fa71896712232e95a
Author: Srivatsa Vaddagiri <vatsa@linux.vnet.ibm.com>
Date: Mon Oct 15 17:00:09 2007 +0200
sched: clean up code under CONFIG_FAIR_GROUP_SCHED
Introduced an assumption of the existence of CPU0 via this line
cfs_rq = tg->cfs_rq[0];
If you have no CPU0, that will be NULL. The fix seems to be just to
take whatever cfs_rq queue comes out of the for_each_possible_cpu()
loop, since they're all equally good for the destruction operation.
Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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keep utime/stime monotonic.
cpustats use utime/stime as a ratio against sum_exec_runtime, as a
consequence it can happen - when the ratio changes faster than time
accumulates - that either can be appear to go backwards.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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account_guest_time() can become static.
Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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When GDB writes a breakpoint into address area of inferior process the
kernel needs to invalidate the modified memory in the inferior which
is done by calling flush_cache_page which in turns calls
r4k_flush_cache_page and local_r4k_flush_cache_page for VSMP or SMTC
kernel via r4k_on_each_cpu().
As the VSMP and SMTC SMP kernels for 34K are running on a single shared
caches it is possible to get away without interprocessor function calls.
This optimization is implemented in r4k_on_each_cpu, so
local_r4k_flush_cache_page is only ever called on the local CPU.
This is where the following code in local_r4k_flush_cache_page() strikes:
/*
* If ownes no valid ASID yet, cannot possibly have gotten
* this page into the cache.
*/
if (cpu_context(smp_processor_id(), mm) == 0)
return;
On VSMP and SMTC had a function of cpu_context() for each CPU(TC).
So in case another CPU than the CPU executing local_r4k_cache_flush_page
has not accessed the mm but one of the other CPUs has there may be data
to be flushed in the cache yet local_r4k_cache_flush_page will falsely
return leaving the I-cache inconsistent for the breakpoint.
While the issue was discovered with GDB it also exists in
local_r4k_flush_cache_range() and local_r4k_flush_cache().
Fixed by introducing a new function has_valid_asid which on MT kernels
returns true if a mm is active on any processor in the system.
This is relativly expensive since for memory acccesses in that loop
cache misses have to be assumed but it seems the most viable solution
for 2.6.23 and older -stable kernels.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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[MIPS] MSP71xx: Fix bitrot.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Enable the onboard GenBus IDE interface in the default configuration.
Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Signed-off-by: Franck Bui-Huu <fbuihuu@gmail.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Contrary to the belief of some, the R3000 and related processors did have
caches, both a data and an instruction cache. Here is an implementation
of r3k_flush_cache_page(), which is the processor-specific back-end for
flush_cache_range(), done according to the spec in
Documentation/cachetlb.txt.
While at it, remove an unused local function: get_phys_page(), do some
trivial formatting fixes and modernise debugging facilities.
Signed-off-by: Maciej W. Rozycki <macro@linux-mips.org>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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A comment on ptrace_getregs() states "Registers are sign extended to
fill the available space." but it is not true. Fix code to match the
comment. Also fix casts on each caller to get rid of some warnings.
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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This patch separates the platform devices registration for the MTX-1
specific devices: GPIO leds and watchdog.
[Minor fixup and formatting change -- Ralf]
Signed-off-by: Florian Fainelli <florian.fainelli@telecomint.eu>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Mmap with MAP_FIXED was not validating the addr and len parameters. This
leads to the failure of GCC's gcc.c-torture/execute/loop-2[fg].c testcases
when using the o32 ABI on a 64 bit kernel.
These testcases try to mmap 65536 bytes at 0x7fff8000 and then access all
the memory. In 2.6.18 and 2.6.23.1 (and likely other versions as well)
the kernel maps the requested memory, but since half of it is above
0x80000000 a SIGBUS is generated when it is accessed.
This patch moves the len validation above the MAP_FIXED processing so that
it is always validated. It also adds validation to the addr parameter for
MAP_FIXED mappings.
Signed-off-by: David Daney <ddaney@avtrex.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Based on original patch by Roel Kluin <12o3l@tiscali.nl>.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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plat_timer_setup is no longer getting called.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Try increasingly longer time periods starting of at 0x10 cycles. This
should be fast on hardware and work nicely with emulators.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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The expression "(long)(read_c0_count() - cnt)" can never be a negative
value on 64-bit kernel. Cast to "int" before comparison.
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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They break the timer interrupt initialization and only seem to be a kludge
for initialization happening in the wrong order. Further testing done by
Thiemo confirms the suspicion that the other invocations also seem to have
useless.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Convert jmr3927_clock_event_device to more generic
txx9tmr_clock_event_device which supports one-shot mode. The
txx9tmr_clock_event_device can be used for TX49 too if the cp0 timer
interrupt was not available.
Convert jmr3927_hpt_read to txx9_clocksource driver which does not
depends jiffies anymore. The txx9_clocksource itself can be used for
TX49, but normally TX49 uses higher precision clocksource_mips.
Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Signed-off-by: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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And general untangling.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Fixme: At the time of this writing cevt-r4k.c doesn't yet know about how
to handle the alternate timer interrupt of the RM9000.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Since the cp0 compare interrupt handler isn't initialized by the time
plat_time_init is called don't set IE_IRQ5 anymore, cevt-r4k.c will do
that a little later itself.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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The only thing it used to do is now done by cevt-r4k.c.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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The old plat_timer_setup hook is no longer getting called so the Alchemy
time initialization was getting skipped.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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This subtle difference makes ELF overlays work.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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clockevent_delta2ns() use the shift and mult value, so
clockevent_set_clock() should be called first.
Pointed out by Atsushi Nemoto.
Signed-off-by: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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set_next_event() and set_mode() are always called with interrupt disabled.
irqsave and irqrestore are not necessary for spinlock.
Pointed out by Atsushi Nemoto.
Signed-off-by: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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Modify the SMTC initialization code to allow boot-time specification not
only of how many VPEs and TCs to use, but also how many TCs out of the
allowed pool are to be bound to VPE 0. The new boot option is "vpe0tcs=N",
where N is an integer. Using it in combination with the existing options
allows arbitrary assignments across the 2 VPEs of a 34K. e.g. "maxtcs=3
vpe0tcs=1" forces VPE0 to have 1 TC, while VPE1 has 2, and "maxtcs=4
vpe0tcs=3" forces VPE0 to have 3 TCs, while VPE1 gets 1. If no vpe0tcs
option is specified, the traditional algorithm of evenly dividing TCs
between available VPEs, with the odd "slop" going to VPE0, is retained.
The reason for doing this is to allow a finer balancing of TCs which can
handle I/O interrupts on Malta (those on VPE 0) and those which cannot.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/libata-dev
* 'alpm' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/libata-dev:
[libata] AHCI: add hw link power management support
[libata] Link power management infrastructure
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master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/libata-dev
* 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/libata-dev:
[libata] AHCI: fix newly introduced host-reset bug
[libata] sata_nv: fix SWNCQ enabling
libata: add MAXTOR 7V300F0/VA111900 to NCQ blacklist
libata: no need to speed down if already at PIO0
libata: relocate forcing PIO0 on reset
pata_ns87415: define SUPERIO_IDE_MAX_RETRIES
[libata] Address some checkpatch-spotted issues
[libata] fix 'if(' and similar areas that lack whitespace
libata: implement ata_wait_after_reset()
libata: track SLEEP state and issue SRST to wake it up
libata: relocate and fix post-command processing
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master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/netdev-2.6
* 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/netdev-2.6: (22 commits)
Fix ethernet multicast for ucc_geth.
netdrvr/pcmcia: use IRQ_TYPE_DYNAMIC_SHARING flag for irq.Attributes.
FEC - fast ethernet controller for mpc52xx
ehea: add kexec support
e1000e: Remove legacy jumbo frame receive code
e1000e: Re-enable SECRC - crc stripping
e1000e: Fix PBA calculation for jumbo frame packets
e1000e: Fix jumbo frame receive code.
drivers/net/irda/au1k_ir: fix obvious irq handler bugs
ipg: Kconfig whitepaces/tab damages
ipg: missing Kconfig dependency
r8169: remove poll_locked logic
r8169: napi config
[PATCH] iwl3945: fix direct scan problem
[PATCH] iwl3945: cancel scan on rxon command
[PATCH] iwl4965: fix scan problem
[PATCH] iwl4965: fix driver hang related to hardware scan
[PATCH] iwlwifi: fix sending probe request in iwl 4965
[PATCH] rtl8187: Allow multicast frames
[PATCH] b43/b43legacy: jiffies_round -> jiffies_round_relative
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