linux-toradex.git/arch, branch v2.6.33.4 Linux kernel for Apalis and Colibri modules MIPS: Sibyte: Apply M3 workaround only on affected chip types and versions. 2010-05-12T22:03:17+00:00 Ralf Baechle ralf@linux-mips.org 2010-04-23T01:56:38+00:00 f32041d369d10bf7bfae39c6b8597fa8463ec304 (cherry picked from commit e65c7f33d75e977350ca350573d93c517ec02776) Previously it was unconditionally used on all Sibyte family SOCs. The M3 bug has to be handled in the TLB exception handler which is extremly performance sensitive, so this modification is expected to deliver around 2-3% performance improvment. This is important as required changes to the M3 workaround will make it more costly. Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> 
(cherry picked from commit e65c7f33d75e977350ca350573d93c517ec02776)

Previously it was unconditionally used on all Sibyte family SOCs.  The
M3 bug has to be handled in the TLB exception handler which is extremly
performance sensitive, so this modification is expected to deliver around
2-3% performance improvment.  This is important as required changes to the
M3 workaround will make it more costly.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
pxa/colibri: fix missing #include <mach/mfp.h> in colibri.h 2010-05-12T22:03:11+00:00 Jakob Viketoft jakob.viketoft@bitsim.com 2010-05-05T10:25:27+00:00 3054cd85318d5bcf403352746bda26287b1efe9f commit ccb8d8d070b8f25f0163da5c9ceacf63a5169540 upstream. The use of mfp_cfg_t causes build errors without including <mach/mfp.h>. CC: Daniel Mack <daniel@caiaq.de> Signed-off-by: Jakob Viketoft <jakob.viketoft@bitsim.com> Signed-off-by: Eric Miao <eric.y.miao@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> 
commit ccb8d8d070b8f25f0163da5c9ceacf63a5169540 upstream.

The use of mfp_cfg_t causes build errors without including <mach/mfp.h>.

CC: Daniel Mack <daniel@caiaq.de>
Signed-off-by: Jakob Viketoft <jakob.viketoft@bitsim.com>
Signed-off-by: Eric Miao <eric.y.miao@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
sparc64: Fix memory leak in pci_register_iommu_region(). 2010-05-12T22:03:05+00:00 David S. Miller davem@davemloft.net 2010-04-11T03:26:55+00:00 70935714dcaf540b6b10328270948a0cda85ab18 [ Upstream commit e182c77cc291456eed127b1472952ddb59a81a9d ] Found by kmemleak. If request_resource() fails, we leak the struct resource we allocated to represent the IOMMU mapping area. This actually happens on sun4v machines because the IOMEM area is only reported sans the IOMMU region, unlike all previous systems. I'll need to fix that at some point, but for now fix the leak. Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> 
[ Upstream commit e182c77cc291456eed127b1472952ddb59a81a9d ]

Found by kmemleak.

If request_resource() fails, we leak the struct resource we
allocated to represent the IOMMU mapping area.

This actually happens on sun4v machines because the IOMEM area is only
reported sans the IOMMU region, unlike all previous systems.  I'll
need to fix that at some point, but for now fix the leak.

Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
sparc64: Adjust __raw_local_irq_save() to cooperate in NMIs. 2010-05-12T22:03:05+00:00 David S. Miller davem@davemloft.net 2010-05-10T12:19:10+00:00 28a1bdd6c2e46a94d86929d5283b72808ee147e9 [ Upstream commits 0c25e9e6cbe7b233bb91d14d0e2c258bf8e6ec83 and c011f80ba0912486fe51dd2b3f71d9b33a151188 ] If we are in an NMI then doing a plain raw_local_irq_disable() will write PIL_NORMAL_MAX into %pil, which is lower than PIL_NMI, and thus we'll re-enable NMIs and recurse. Doing a simple: %pil = %pil | PIL_NORMAL_MAX does what we want, if we're already at PIL_NMI (15) we leave it at that setting, else we set it to PIL_NORMAL_MAX (14). This should get the function tracer working on sparc64. Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> 
[ Upstream commits 0c25e9e6cbe7b233bb91d14d0e2c258bf8e6ec83 and
   c011f80ba0912486fe51dd2b3f71d9b33a151188 ]

If we are in an NMI then doing a plain raw_local_irq_disable() will
write PIL_NORMAL_MAX into %pil, which is lower than PIL_NMI, and thus
we'll re-enable NMIs and recurse.

Doing a simple:

	%pil = %pil | PIL_NORMAL_MAX

does what we want, if we're already at PIL_NMI (15) we leave it at
that setting, else we set it to PIL_NORMAL_MAX (14).

This should get the function tracer working on sparc64.

Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
sparc64: Use kstack_valid() in die_if_kernel(). 2010-05-12T22:03:04+00:00 David S. Miller davem@davemloft.net 2010-04-13T05:16:22+00:00 d59547af05037f84707a57c90cee3fdfecc8c4b7 [ Upstream commit cb256aa60409efd803806cfb0528a4b3f8397dba ] This gets rid of a local function (is_kernel_stack()) which tries to do the same thing, yet poorly in that it doesn't handle IRQ stacks properly. Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> 
[ Upstream commit cb256aa60409efd803806cfb0528a4b3f8397dba ]

This gets rid of a local function (is_kernel_stack()) which tries to
do the same thing, yet poorly in that it doesn't handle IRQ stacks
properly.

Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
sparc64: Fix hardirq tracing in trap return path. 2010-05-12T22:03:03+00:00 David S. Miller davem@davemloft.net 2010-04-20T07:48:37+00:00 632b87bf40eefba3fccfdeeca550540eb9c78345 [ Upstream commit 28a1f533ae8606020238b840b82ae70a3f87609e ] We can overflow the hardirq stack if we set the %pil here so early, just let the normal control flow do it. This is fine as we are allowed to do the actual IRQ enable at any point after we call trace_hardirqs_on. Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> 
[ Upstream commit 28a1f533ae8606020238b840b82ae70a3f87609e ]

We can overflow the hardirq stack if we set the %pil here
so early, just let the normal control flow do it.

This is fine as we are allowed to do the actual IRQ enable
at any point after we call trace_hardirqs_on.

Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
sparc64: Fix PREEMPT_ACTIVE value. 2010-05-12T22:03:03+00:00 David S. Miller davem@davemloft.net 2010-04-19T08:30:51+00:00 e460d8d05b193b8f51af1220cf60963a53d9c5a9 [ Upstream commit 6c94b1ee0ca2bfb526d779c088ec20da6a3761db ] It currently overlaps the NMI bit. Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> 
[ Upstream commit 6c94b1ee0ca2bfb526d779c088ec20da6a3761db ]

It currently overlaps the NMI bit.

Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
sparc64: Use correct pt_regs in decode_access_size() error paths. 2010-05-12T22:03:02+00:00 David S. Miller davem@davemloft.net 2010-04-19T20:46:48+00:00 cef0d77411b68ff897c9dc8370394baee004bbe2 [ Upstream commit baa06775e224e9f74e5c2de894c95cd49678beff ] Signed-off-by: David S. Miller <davem@davemloft.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> 
[ Upstream commit baa06775e224e9f74e5c2de894c95cd49678beff ]

Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
powerpc: Reduce printk from pseries_mach_cpu_die() 2010-05-12T22:02:54+00:00 Vaidyanathan Srinivasan svaidy@linux.vnet.ibm.com 2010-03-01T02:58:23+00:00 2a2f4e85df27a534760e704d0c84c178928fee1f commit a8e6da093ea8642b1320fb5d64134366f2a8d0ac upstream. Remove debug printks in pseries_mach_cpu_die(). These are noisy at runtime. Traceevents can be added to instrument this section of code. The following KERN_INFO printks are removed: cpu 62 (hwid 62) returned from cede. Decrementer value = b2802fff Timebase value = 2fa8f95035f4a cpu 62 (hwid 62) got prodded to go online cpu 58 (hwid 58) ceding for offline with hint 2 Signed-off-by: Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com> Cc: Gautham R Shenoy <ego@in.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> 
commit a8e6da093ea8642b1320fb5d64134366f2a8d0ac upstream.

Remove debug printks in pseries_mach_cpu_die().  These are
noisy at runtime.  Traceevents can be added to instrument this
section of code.

The following KERN_INFO printks are removed:

cpu 62 (hwid 62) returned from cede.
Decrementer value = b2802fff Timebase value = 2fa8f95035f4a
cpu 62 (hwid 62) got prodded to go online
cpu 58 (hwid 58) ceding for offline with hint 2

Signed-off-by: Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com>
Cc: Gautham R Shenoy <ego@in.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
powerpc: Move checks in pseries_mach_cpu_die() 2010-05-12T22:02:54+00:00 Vaidyanathan Srinivasan svaidy@linux.vnet.ibm.com 2010-03-01T02:58:16+00:00 815d3145a7836f6c03671a2d1a009123869ea5f2 commit 0212f2602a38e740d5a96aba4cebfc2ebc993ecf upstream. Rearrange condition checks for better code readability and prevention of possible race conditions when preferred_offline_state can potentially change during the execution of pseries_mach_cpu_die(). The patch will make pseries_mach_cpu_die() put cpu in one of the consistent states and not hit the run over BUG() Signed-off-by: Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com> Cc: Gautham R Shenoy <ego@in.ibm.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de> 
commit 0212f2602a38e740d5a96aba4cebfc2ebc993ecf upstream.

Rearrange condition checks for better code readability and
	prevention of possible race conditions when
	preferred_offline_state can potentially change during the
	execution of pseries_mach_cpu_die().  The patch will make
	pseries_mach_cpu_die() put cpu in one of the consistent states
	and not hit the run over BUG()

Signed-off-by: Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com>
Cc: Gautham R Shenoy <ego@in.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>