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master.kernel.org:/pub/scm/linux/kernel/git/arnd/cell-2.6 into merge
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The only tricky part is we need to adjust the PTE insertion loop to
cater for holes in the page table. The PTEs for each segment start on
a 4K boundary, so with 16M pages we have 16 PTEs per segment and then
a gap to the next 4K page boundary.
It might be possible to allocate the PTEs for each segment separately,
saving the memory currently filling the gaps. However we'd need to
check that's OK with the hardware, and that it actually saves memory.
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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Make some preliminary changes to cell_iommu_alloc_ptab() to allow it to
take the page size as a parameter rather than assuming IOMMU_PAGE_SIZE.
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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We use n_pte_pages to calculate the stride through the page tables, but
we also use it to set the NPPT value in the segment table entry. That is
defined as the number of 4K pages per segment, so we should calculate
it as such regardless of the IOMMU page size.
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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separately
Currently the cell IOMMU code allocates the entire IOMMU page table in a
contiguous chunk. This is nice and tidy, but for machines with larger
amounts of RAM the page table allocation can fail due to it simply being
too large.
So split the segment table and page table setup routine, and arrange to
have the dynamic and fixed page tables allocated separately.
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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There's no need to allocate the pad page unless we're going to actually
use it - so move the allocation to where we know we're going to use it.
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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The cell IOMMU code no longer needs to save the pte_offset variable
separately, it is incorporated into tbl->it_offset.
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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The cell IOMMU tce build and free routines use pte_offset to convert
the index passed from the generic IOMMU code into a page table offset.
This takes into account the SPIDER_DMA_OFFSET which sets the top bit
of every DMA address.
However it doesn't cater for the IOMMU window starting at a non-zero
address, as the base of the window is not incorporated into pte_offset
at all.
As it turns out tbl->it_offset already contains the value we need, it
takes into account the base of the window and also pte_offset. So use
it instead!
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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It's called the fixed mapping, not the static mapping.
Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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Ulrich Weigand has found that the hardware watchpoints on cell were not
working back in November :
http://ozlabs.org/pipermail/linuxppc-dev/2007-November/046135.html
This patch sets them during initialization.
Signed-off-by: Jens Osterkamp <jens@de.ibm.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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This moves the private DABRX definitions for celleb from beat.h to
reg.h to make them usable for all.
Signed-off-by: Jens Osterkamp <jens@de.ibm.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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This patch enables OProfile callgraph support for the Cell processor. The
original code was just calling a function to add the PC value, now it will
call a function that first checks the callgraph depth. Callgraph is already
enabled on the other Power platforms.
Signed-off-by: Bob Nelson <rrnelson@us.ibm.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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git://git.kernel.org/pub/scm/linux/kernel/git/jk/spufs into merge
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master.kernel.org:/pub/scm/linux/kernel/git/jwboyer/powerpc-4xx into merge
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* 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm:
[ARM] 4843/1: Add GCR_CLKBPB for PXA3xx
[ARM] 4842/1: pxa: remove redundant IRQ saving/restoring in clk_pxa3xx_cken_*
[ARM] 4841/1: pxa: fix typo in LCD platform data definition code for zylonite
[ARM] 4840/1: pxa: fix the typo in get_irqnr_and_base
[ARM] 4839/1: fixes kernel Oops in /dev/mem device driver for memory map with PHYS_OFF
[ARM] eliminate MODULE_PARM() usage
[ARM] 4838/1: Fix kexec for SA1100 machines
[ARM] 4837/1: make __get_unaligned_*() return unsigned types
[ARM] 4836/1: Make ATAGS_PROC depend on KEXEC
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This is unnecessary since it is already protected by
spin_lock_irq{save, restore} in clock.c.
Signed-off-by: eric miao <eric.miao@marvell.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Signed-off-by: eric miao <eric.miao@marvell.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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with PHYS_OFF
"cat /dev/mem" may cause kernel Oops for boards with PHYS_OFFSET != 0
because character device is mapped to addresses starting from zero
and there is no protection against such situation.
Patch just add this.
Signed-off-by: Alexandre Rusev <arusev@ru.mvista.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Convert debug-only (and removed) MODULE_PARM() to module_param().
Compiles cleanly (with DEBUG=1).
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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On Wed, Feb 20, 2008 at 11:50:33AM +0100, Guennadi Liakhovetski wrote:
> arch/arm/kernel/atags.c uses for some reason the
> KEXEC_BOOT_PARAMS_SIZE macro, which is only defined if CONFIG_KEXEC
> is set. So, either this macro should be defined always, or another
> macro should be used, or ATAGS_PROC should depend on KEXEC.
As the procfs export of ATAGS is not meant as a stable, general purpose
ABI it shouldn't be an independent, general configuration option.
This patch make ATAGS_PROC depend on KEXEC
Signed-off-by: Uli Luckas <u.luckas@road.de>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Fix 32-on-64 pvops kernel:
we don't want userspace using syscall/sysenter, even if the hypervisor
supports it, so mask it out from CPUID.
Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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revert the BTS ptrace extension for now.
based on general objections from Roland McGrath:
http://lkml.org/lkml/2008/2/21/323
we'll let the BTS functionality cook some more and re-enable
it in v2.6.26. We'll leave the dead code around to help the
development of this code.
(X86_BTS is not defined at the moment)
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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avoid over-eager large page splitup.
When the target area needs to be split or is split already (ioremap)
then the current code enforces the split of large mappings in the alias
regions even if we could avoid it.
Use a separate variable processed in the cpa_data structure to carry
the number of pages which have been processed instead of reusing the
numpages variable. This keeps numpages intact and gives the alias code
a chance to keep large mappings intact.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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delay the removal of this symbol export by one more kernel release,
giving external modules such as VirtualBox a chance to stop using it.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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Jan Beulich noticed it during code review that if a driver's ioremap()
fails (say due to -ENOMEM) then we might leak the struct vm_area.
Free it properly.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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Priit Laes discovered that the sed command processing nm output was
sensitive to locale settings. This was addressed in commit
03994f01e8b72b3d01fd3d09d1cc7c9f421a727c by using [:alnum:] in place of
[a-zA-Z0-9].
But that solution too is locale-dependent and may not always match
the identifiers it needs to. The better fix is just to run sed et al
with a fixed locale setting in all builds.
Signed-off-by: Roland McGrath <roland@redhat.com>
CC: Priit Laes <plaes@plaes.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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a recent fix:
commit ce28b9864b853803320c3f1d8de1b81aa4120b14
Author: Thomas Gleixner <tglx@linutronix.de>
Date: Wed Feb 20 23:57:30 2008 +0100
x86: fix vsyscall wreckage
removed the broken /kernel/vsyscall64 handler completely.
This triggers the following debug check:
sysctl table check failed: /kernel/vsyscall64 No proc_handler
Restore the sane part of the proc handler.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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Fix a kernel bug (vmware boot problem) reported by Tomasz Grobelny,
which occurs with certain .config variants and gccs.
The x86 TLS cleanup in commit efd1ca52d04d2f6df337a3332cee56cd60e6d4c4
made the sys_set_thread_area and sys_get_thread_area functions ripe for
tail call optimization. If the compiler chooses to use it for them, it
can clobber the user trap frame because these are asmlinkage functions.
Reported-by: Tomasz Grobelny <tomasz@grobelny.oswiecenia.net>
Signed-off-by: Roland McGrath <roland@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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git://git.kernel.org/pub/scm/linux/kernel/git/hskinnemoen/avr32-2.6
* 'avr32-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/hskinnemoen/avr32-2.6:
avr32: Fix OCD refcounting bug
avr32: Call tick_nohz_{stop,restart}_sched_tick() in idle loop
avr32: Use correct config symbol in atstk1004 board code
avr32: Fix broken pte dump code in do_page_fault()
AVR32: Define PAGE_SHARED
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git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/blackfin-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/cooloney/blackfin-2.6: (35 commits)
Blackfin Serial Driver: Fix bug - Only insert UART rx char in timer task.
Blackfin Serial Driver: Fix bug - update tx dma buffer tail before wake up processes.
Blackfin Serial Driver: Fix bug - Increase buffer tail immediately before starting tx dma.
[Blackfin] serial driver: Add flow control support to bf54x
[Blackfin] serial driver: Fix bug Poll RTS/CTS status in DMA mode as well
[Blackfin] serial driver: ADSP-BF52x arch/mach support
[Blackfin] serial driver: use simpler comment headers and strip out information that is maintained in the scm's log
[Blackfin] serial driver: rework break flood anomaly handling to be more robust/realistic about what we can actually work around
[Blackfin] serial driver: fix bug - cache the bits of the LSR on systems where the LSR is read-to-clear
[Blackfin] serial driver: fix bug - should not wait for the TFI bit, just clear it when tx stop.
[Blackfin] serial driver: Fix bug serial driver in DMA mode spams history to console on shell restart
[Blackfin] serial driver: Fix bug Free rx dma buffer in shutdown.
[Blackfin] serial driver: Clean up UART DMA code.
Blackfin Serial driver: Fix bug - serial driver in PIO mode cant handle input very quickly
[Blackfin] arch: kill section mismatch warnings
[Blackfin] arch: handle the most common L1 shrinkage case (L1 does not exist for a part) so that any parts labeled for L1 instead get placed into external memory sections
[Blackfin] arch: add bfin_clear_PPIx_STATUS() helper funcs like we have for other parts
[Blackfin] arch: make sure we have proper description/copyright/license lines
[Blackfin] arch: Fix CONFIG_PM support for BF561
[Blackfin] arch: Remove DPMC char driver option
...
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* git://git.kernel.org/pub/scm/linux/kernel/git/lethal/sh-2.6:
arch/sh/drivers/dma/dma-sh.c: Correct use of ! and &
serial: Move asm-sh/sci.h to linux/serial_sci.h.
sh: Fix up HAS_SR_RB typo in entry-macros.
maple: fix device detection
sh: fix rtc_resources setup for sh770x
sh: heartbeat: ioremap is expected to succeed
sh: Storage class should be before const qualifier
maple: remove unused variable
sh: SH5-103 needs to select CPU_SH5.
sh: Rename SH-3 CCR3 reg to avoid synclink_cs clash.
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* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6:
[SPARC64]: Adjust kernel PC validation test in fault handler.
[SPARC64]: Loosen checks in exception table handling.
[SPARC64]: Fix section mismatch from kernel_map_range
[SPARC64]: Fix section mismatchs from dr_cpu_data
[SPARC]: Fix build in arch/sparc/kernel/led.c
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The spu_runcntl_RW register is restored within spu_restore function.
So, at the end of spu_bind_context, the SPU context is not just loaded,
but running.
This change corrects the state switch to account the time as USER.
Signed-off-by: Andre Detsch <adetsch@br.ibm.com>
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
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Because of the new futex validation init handler, we have
to accept faults in init section text as well as the normal
kernel text.
Thanks to Tom Callaway for the bug report.
Signed-off-by: David S. Miller <davem@davemloft.net>
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There is a potential race between flushes of the entire SLB in the MFC
and the point where new entries are being established. The problem is
that we might put a ESID entry into the MFC SLB when the VSID entry has
just been cleared by the global flush.
This can be circumvented by holding the register_lock throughout both
the flushing and the creation of SLB entries.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
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When we replace an SLB entry in the MFC after using up all the available
entries, there is a short window in which an incorrect entry is marked
as valid.
The problem is that the 'valid' bit is stored in the ESID, which is
always written after the VSID. Overwriting the VSID first will make the
original ESID entry point to the new VSID, which means that any
concurrent DMA accessing the old ESID ends up being redirected to the
new virtual address. A few cycles later, we write the new ESID and
everything is fine again.
That race can be closed by writing a zero entry to the ESID first, which
makes sure that the VSID is not accessed until we write the new ESID.
Note that we don't actually need to invalidate the SLB entry using the
invalidation register, which would also flush any ERAT entries for that
segment, because the segment translation does not become invalid but is
only removed from the SLB cache.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
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There is a small race between the context save procedure
and the SPU interrupt handling, where we expect all interrupt
processing to have finished after disabling them, while
an interrupt is still being processed on another CPU.
The obvious fix is to call synchronize_irq() after disabling
the interrupts at the start of the context save procedure
to make sure we never access the SPU any more during an
ongoing save or even after that.
Thanks to Benjamin Herrenschmidt for pointing this out.
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
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Currently, we get the following output from sputrace:
[5.097935954] 1606: spufs_ps_nopfn__enter (thread = 1605, spu = -1)
[5.097958164] 1606: spufs_ps_nopfn__insert (thread = 1605, spu = 15)
[5.097973529] 1607: spufs_ps_nopfn__enter (thread = 1605, spu = -1)
[5.097989174] 1607: spufs_ps_nopfn__insert (thread = 1605, spu = 14)
Which leads me to believe that 160[67] is the current thread ID, and
1605 is the context backing the psmap.
However, the 'current' and 'owner' tids are reversed - the 'current'
tid is on the right. This change puts the current thread ID in the
left-hand column instead, and renames the right to 'ctxthread'.
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
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Correct the remaining 44x cuboot wrappers to define TARGET_4xx as well. This
creates the correct structure to use, including things like the second MAC
address.
Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
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At present, we have a situation where a context with no owner is
re-scheduled by spu_forget:
Thread 1: reading regs file Thread 2: context owner
spu_forget()
- ctx->owner = NULL
- set SPU_SCHED_WAS_ACTIVE
spu_acquire_saved()
- context is in saved state
spu_release_saved()
- SPU_SCHED_WAS_ACTIVE is set,
so spu_activate() the context,
which now has no owner
In spu_forget(), we shouldn't be requesting a re-schedule by setting
SPU_SCHED_WAS_ACTIVE. This change removes the set_bit in spu_forget(),
so that spu_release_saved() doesn't reinsert this destroyed context on
to the run queue.
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
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In order to get the proper boad info (bd_info) structure defined in ppcboot.h
both TARGET_4xx and TARGET_44x should be defined for all PowerPC 440 boards.
The 440GX boards also need TARGET_440GX defined since they have 4 EMACs and
there are 4 MAC addesses in bd_info passed by u-boot.
Signed-off-by: Valentine Barshak <vbarshak@ru.mvista.com>
Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
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This patch changes the katmai (440SPe) L1 cache size to 32k. Some
whitespace issues are cleaned up too.
Signed-off-by: Stefan Roese <sr@denx.de>
Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
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Since the 4xx PCIe driver checks for 405ex compatibility, the
PCIe interface was not detected as it is currently defined as
"405exr" compatible. This patch changes it to "405ex".
The 405EX and 405EXr are identical exept that the 2nd PCIe and the
2nd EMAC interfaces are missing.
Signed-off-by: Stefan Roese <sr@denx.de>
Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
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Iff the parent has TIF_DEBUG set, _and_ clone_flags includes
CLONE_PTRACE we should set the TIF_DEBUG flag for the child and
increment the ocd refcount. Otherwise, the TIF_DEBUG flag must be
unset.
Currently, the child inherits TIF_DEBUG from the parent before
copy_thread is called, so TIF_DEBUG may be already be set before we
determine whether the child is supposed to inherit debugging
capabilities from the parent or not. This means that ocd_enable()
won't increment the refcount, because TIF_DEBUG is already set, and
that TIF_DEBUG will be set for processes that aren't being debugged.
This leads to a refcounting asymmetry, which may show up as
------------[ cut here ]------------
Badness at arch/avr32/kernel/ocd.c:73
PC is at ocd_disable+0x34/0x60
LR is at put_lock_stats+0xa/0x20
as reported by David Brownell. Happens when strace'ing a process that
forks a new child process, e.g. "strace mount -tjffs2 mtd1 /mnt", and
subsequently killing the child process (e.g. "umount /mnt".)
Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
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We have a small window where a spu context may be destroyed while
we're servicing a page fault (from another thread) to the context's
problem state mapping.
After we up_read() the mmap_sem, it's possible that the context is
destroyed by its owning thread, and so the later references to ctx
are invalid. This can maifest as a deadlock on the (now free()-ed)
context state mutex.
This change adds a reference to the context before we release the
mmap_sem, so that the context cannot be destroyed.
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
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Some parts of the kernel now do things like do *_user() accesses while
set_fs(KERNEL_DS) that fault on purpose.
See, for example, the code added by changeset
a0c1e9073ef7428a14309cba010633a6cd6719ea ("futex: runtime enable pi
and robust functionality").
That trips up the ASI sanity checking we make in do_kernel_fault().
Just remove it for now. Maybe we can add it back later with an added
conditional which looks at the current get_fs() value.
Signed-off-by: David S. Miller <davem@davemloft.net>
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In commit e6bafba5b4765a5a252f1b8d31cbf6d2459da337, a bug was fixed that
involved converting !x & y to !(x & y). The code below shows the same
pattern, and thus should perhaps be fixed in the same way.
This is not tested and clearly changes the semantics, so it is only
something to consider.
The semantic patch that makes this change is as follows:
(http://www.emn.fr/x-info/coccinelle/)
// <smpl>
@@ expression E1,E2; @@
(
!E1 & !E2
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- !E1 & E2
+ !(E1 & E2)
)
// </smpl>
Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
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* git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86: (24 commits)
x86: no robust/pi futex for real i386 CPUs
x86: fix boot failure on 486 due to TSC breakage
x86: fix build on non-C locales.
x86: make c_idle.work have a static address.
x86: don't save unreliable stack trace entries
x86: don't make swapper_pg_pmd global
x86: don't print a warning when MTRR are blank and running in KVM
x86: fix execve with -fstack-protect
x86: fix vsyscall wreckage
x86: rename KERNEL_TEXT_SIZE => KERNEL_IMAGE_SIZE
x86: fix spontaneous reboot with allyesconfig bzImage
x86: remove double-checking empty zero pages debug
x86: notsc is ignored on common configurations
x86/mtrr: fix kernel-doc missing notation
x86: handle BIOSes which terminate e820 with CF=1 and no SMAP
x86: add comments for NOPs
x86: don't use P6_NOPs if compiling with CONFIG_X86_GENERIC
x86: require family >= 6 if we are using P6 NOPs
x86: do not promote TM3x00/TM5x00 to i686-class
x86: hpet fix docbook comment
...
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> Diffing dmesg between git7 and git8 doesn't sched any light since
> git8 also removed the printouts of the x86 caps as they were being
> initialised and updated. I'm currently adding those printouts back
> in the hope of seeing where and when the caps get broken.
That turned out to be very illuminating:
--- dmesg-2.6.24-git7 2008-02-24 18:01:25.295851000 +0100
+++ dmesg-2.6.24-git8 2008-02-24 18:01:25.530358000 +0100
...
CPU: After generic identify, caps: 00000003 00000000 00000000 00000000 00000000 00000000 00000000 00000000
CPU: After all inits, caps: 00000003 00000000 00000000 00000000 00000000 00000000 00000000 00000000
+CPU: After applying cleared_cpu_caps, caps: 00000013 00000000 00000000 00000000 00000000 00000000 00000000 00000000
Notice how the TSC cap bit goes from Off to On.
(The first two lines are printout loops from -git7 forward-ported
to -git8, the third line is the same printout loop added just after
the xor-with-cleared_cpu_caps[] loop.)
Here's how the breakage occurs:
1. arch/x86/kernel/tsc_32.c:tsc_init() sees !cpu_has_tsc,
so bails and calls setup_clear_cpu_cap(X86_FEATURE_TSC).
2. include/asm-x86/cpufeature.h:setup_clear_cpu_cap(bit) clears
the bit in boot_cpu_data and sets it in cleared_cpu_caps
3. arch/x86/kernel/cpu/common.c:identify_cpu() XORs all caps
in with cleared_cpu_caps
HOWEVER, at this point c->x86_capability correctly has TSC
Off, cleared_cpu_caps has TSC On, so the XOR incorrectly
sets TSC to On in c->x86_capability, with disastrous results.
The real bug is that clearing bits with XOR only works if the
bits are known to be 1 prior to the XOR, and that's not true here.
A simple fix is to convert the XOR to AND-NOT instead. The following
patch does that, and allows my 486 to boot 2.6.25-rc kernels again.
[ mingo@elte.hu: fixed a similar bug in setup_64.c as well. ]
The breakage was introduced via commit 7d851c8d3db0.
Signed-off-by: Mikael Pettersson <mikpe@it.uu.se>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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For some locales regex range [a-zA-Z] does not work as it is supposed to.
so we have to use [:alnum:] and [:xdigit:] to make it work as intended.
[1] http://en.wikipedia.org/wiki/Estonian_alphabet
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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