<feed xmlns='http://www.w3.org/2005/Atom'>
<title>linux.git/arch, branch v3.17-rc7</title>
<subtitle>Linux kernel source tree</subtitle>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux.git/'/>
<entry>
<title>Merge tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc</title>
<updated>2014-09-27T21:58:59+00:00</updated>
<author>
<name>Linus Torvalds</name>
<email>torvalds@linux-foundation.org</email>
</author>
<published>2014-09-27T21:58:59+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux.git/commit/?id=83692898642a6d4950d3cd47971b101424d47859'/>
<id>83692898642a6d4950d3cd47971b101424d47859</id>
<content type='text'>
Pull ARM SoC fixes from Olof Johansson:
 "Here's our last set of fixes for 3.17.  Most of these are for TI
  platforms, fixing some noisy Kconfig issues, runtime clock and power
  issues on several platforms and NAND timings on DRA7.

  There are also a couple of bug fixes for i.MX, one for QCOM and a
 small fix to avoid section mismatch noise on PXA.

  Diffstat looks large, partially due to some tables being updated and
  thus touching many lines.  The qcom gsbi change also restructures
  clock management a bit and thus touches a bunch of lines.

  All in all, a bit more changes than we'd like at this point, but
  nothing stands out as risky either so it seems like the right thing to
  send it up now instead of holding it to the merge window"

* tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
  drivers/soc: qcom: do not disable the iface clock in probe
  ARM: imx: fix .is_enabled() of shared gate clock
  ARM: OMAP3: Fix I/O chain clock line assertion timed out error
  ARM: keystone: dts: fix bindings for pcie and usb clock nodes
  bus: omap_l3_noc: Fix connID for OMAP4
  ARM: DT: imx53: fix lvds channel 1 port
  ARM: dts: cm-t54: fix serial console power supply.
  ARM: dts: dra7-evm: Fix NAND GPMC timings
  ARM: pxa: fix section mismatch warning for pxa_timer_nodt_init
  ARM: OMAP: Fix Kconfig warning for omap1
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
Pull ARM SoC fixes from Olof Johansson:
 "Here's our last set of fixes for 3.17.  Most of these are for TI
  platforms, fixing some noisy Kconfig issues, runtime clock and power
  issues on several platforms and NAND timings on DRA7.

  There are also a couple of bug fixes for i.MX, one for QCOM and a
 small fix to avoid section mismatch noise on PXA.

  Diffstat looks large, partially due to some tables being updated and
  thus touching many lines.  The qcom gsbi change also restructures
  clock management a bit and thus touches a bunch of lines.

  All in all, a bit more changes than we'd like at this point, but
  nothing stands out as risky either so it seems like the right thing to
  send it up now instead of holding it to the merge window"

* tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
  drivers/soc: qcom: do not disable the iface clock in probe
  ARM: imx: fix .is_enabled() of shared gate clock
  ARM: OMAP3: Fix I/O chain clock line assertion timed out error
  ARM: keystone: dts: fix bindings for pcie and usb clock nodes
  bus: omap_l3_noc: Fix connID for OMAP4
  ARM: DT: imx53: fix lvds channel 1 port
  ARM: dts: cm-t54: fix serial console power supply.
  ARM: dts: dra7-evm: Fix NAND GPMC timings
  ARM: pxa: fix section mismatch warning for pxa_timer_nodt_init
  ARM: OMAP: Fix Kconfig warning for omap1
</pre>
</div>
</content>
</entry>
<entry>
<title>Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus</title>
<updated>2014-09-27T21:42:18+00:00</updated>
<author>
<name>Linus Torvalds</name>
<email>torvalds@linux-foundation.org</email>
</author>
<published>2014-09-27T21:42:18+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux.git/commit/?id=74807afd3f4eb403e490b5db7af1ece117262f5b'/>
<id>74807afd3f4eb403e490b5db7af1ece117262f5b</id>
<content type='text'>
Pull MIPS fixes from Ralf Baechle:
 "The final round of fixes.  One corner case in the math emulator and
  another one in the mcount function for ftrace"

* 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus:
  MIPS: mcount: Adjust stack pointer for static trace in MIPS32
  MIPS: Fix MFC1 &amp; MFHC1 emulation for 64-bit MIPS systems
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
Pull MIPS fixes from Ralf Baechle:
 "The final round of fixes.  One corner case in the math emulator and
  another one in the mcount function for ftrace"

* 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus:
  MIPS: mcount: Adjust stack pointer for static trace in MIPS32
  MIPS: Fix MFC1 &amp; MFHC1 emulation for 64-bit MIPS systems
</pre>
</div>
</content>
</entry>
<entry>
<title>Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip</title>
<updated>2014-09-27T21:23:13+00:00</updated>
<author>
<name>Linus Torvalds</name>
<email>torvalds@linux-foundation.org</email>
</author>
<published>2014-09-27T21:23:13+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux.git/commit/?id=cd40fab6dbf4173c1617557be720dcec89657866'/>
<id>cd40fab6dbf4173c1617557be720dcec89657866</id>
<content type='text'>
Pull x86 fixes from Ingo Molnar:
 "This has:

   - EFI revert to fix a boot regression
   - early_ioremap() fix for boot failure
   - KASLR fix for possible boot failures
   - EFI fix for corrupted string printing
   - remove a misleading EFI bootup 'failed!' error message

  Unfortunately it's all rather close to the merge window"

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/efi: Truncate 64-bit values when calling 32-bit OutputString()
  x86/efi: Delete misleading efi_printk() error message
  Revert "efi/x86: efistub: Move shared dependencies to &lt;asm/efi.h&gt;"
  x86/kaslr: Avoid the setup_data area when picking location
  x86 early_ioremap: Increase FIX_BTMAPS_SLOTS to 8
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
Pull x86 fixes from Ingo Molnar:
 "This has:

   - EFI revert to fix a boot regression
   - early_ioremap() fix for boot failure
   - KASLR fix for possible boot failures
   - EFI fix for corrupted string printing
   - remove a misleading EFI bootup 'failed!' error message

  Unfortunately it's all rather close to the merge window"

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/efi: Truncate 64-bit values when calling 32-bit OutputString()
  x86/efi: Delete misleading efi_printk() error message
  Revert "efi/x86: efistub: Move shared dependencies to &lt;asm/efi.h&gt;"
  x86/kaslr: Avoid the setup_data area when picking location
  x86 early_ioremap: Increase FIX_BTMAPS_SLOTS to 8
</pre>
</div>
</content>
</entry>
<entry>
<title>Merge branch 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip</title>
<updated>2014-09-26T15:38:09+00:00</updated>
<author>
<name>Linus Torvalds</name>
<email>torvalds@linux-foundation.org</email>
</author>
<published>2014-09-26T15:38:09+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux.git/commit/?id=d2865c7d4ef818421941579e185c1e4743692f85'/>
<id>d2865c7d4ef818421941579e185c1e4743692f85</id>
<content type='text'>
Pull scheduler fixes from Ingo Molnar:
 "A CONFIG_STACK_GROWSUP=y fix, and a hotplug llc CPU mask fix"

* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  sched: Fix unreleased llc_shared_mask bit during CPU hotplug
  sched: Fix end_of_stack() and location of stack canary for architectures using CONFIG_STACK_GROWSUP
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
Pull scheduler fixes from Ingo Molnar:
 "A CONFIG_STACK_GROWSUP=y fix, and a hotplug llc CPU mask fix"

* 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  sched: Fix unreleased llc_shared_mask bit during CPU hotplug
  sched: Fix end_of_stack() and location of stack canary for architectures using CONFIG_STACK_GROWSUP
</pre>
</div>
</content>
</entry>
<entry>
<title>MIPS: mcount: Adjust stack pointer for static trace in MIPS32</title>
<updated>2014-09-26T09:41:17+00:00</updated>
<author>
<name>Markos Chandras</name>
<email>markos.chandras@imgtec.com</email>
</author>
<published>2014-09-16T14:55:12+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux.git/commit/?id=8a574cfa2652545eb95595d38ac2a0bb501af0ae'/>
<id>8a574cfa2652545eb95595d38ac2a0bb501af0ae</id>
<content type='text'>
Every mcount() call in the MIPS 32-bit kernel is done as follows:

[...]
move at, ra
jal _mcount
addiu sp, sp, -8
[...]

but upon returning from the mcount() function, the stack pointer
is not adjusted properly. This is explained in details in 58b69401c797
(MIPS: Function tracer: Fix broken function tracing).

Commit ad8c396936e3 ("MIPS: Unbreak function tracer for 64-bit kernel.)
fixed the stack manipulation for 64-bit but it didn't fix it completely
for MIPS32.

Signed-off-by: Markos Chandras &lt;markos.chandras@imgtec.com&gt;
Cc: &lt;stable@vger.kernel.org&gt;
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/7792/
Signed-off-by: Ralf Baechle &lt;ralf@linux-mips.org&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
Every mcount() call in the MIPS 32-bit kernel is done as follows:

[...]
move at, ra
jal _mcount
addiu sp, sp, -8
[...]

but upon returning from the mcount() function, the stack pointer
is not adjusted properly. This is explained in details in 58b69401c797
(MIPS: Function tracer: Fix broken function tracing).

Commit ad8c396936e3 ("MIPS: Unbreak function tracer for 64-bit kernel.)
fixed the stack manipulation for 64-bit but it didn't fix it completely
for MIPS32.

Signed-off-by: Markos Chandras &lt;markos.chandras@imgtec.com&gt;
Cc: &lt;stable@vger.kernel.org&gt;
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/7792/
Signed-off-by: Ralf Baechle &lt;ralf@linux-mips.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>MIPS: Fix MFC1 &amp; MFHC1 emulation for 64-bit MIPS systems</title>
<updated>2014-09-26T09:33:11+00:00</updated>
<author>
<name>Paul Burton</name>
<email>paul.burton@imgtec.com</email>
</author>
<published>2014-09-24T09:45:37+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux.git/commit/?id=c8c0da6bdf0f0d6f59fc23aab6ee373a131df82d'/>
<id>c8c0da6bdf0f0d6f59fc23aab6ee373a131df82d</id>
<content type='text'>
Commit bbd426f542cb "MIPS: Simplify FP context access" modified the
SIFROMREG &amp; SIFROMHREG macros such that they return unsigned rather
than signed 32b integers. I had believed that to be fine, but
inadvertently missed the MFC1 &amp; MFHC1 cases which write to a struct
pt_regs regs element. On MIPS32 this is fine, but on 64 bit those
saved regs' fields are 64 bit wide. Using unsigned values caused the
32 bit value from the FP register to be zero rather than sign extended
as the architecture specifies, causing incorrect emulation of the
MFC1 &amp; MFHc1 instructions. Fix by reintroducing the casts to signed
integers, and therefore the sign extension.

Signed-off-by: Paul Burton &lt;paul.burton@imgtec.com&gt;
Cc: stable@vger.kernel.org # v3.15+
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/7848/
Signed-off-by: Ralf Baechle &lt;ralf@linux-mips.org&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
Commit bbd426f542cb "MIPS: Simplify FP context access" modified the
SIFROMREG &amp; SIFROMHREG macros such that they return unsigned rather
than signed 32b integers. I had believed that to be fine, but
inadvertently missed the MFC1 &amp; MFHC1 cases which write to a struct
pt_regs regs element. On MIPS32 this is fine, but on 64 bit those
saved regs' fields are 64 bit wide. Using unsigned values caused the
32 bit value from the FP register to be zero rather than sign extended
as the architecture specifies, causing incorrect emulation of the
MFC1 &amp; MFHc1 instructions. Fix by reintroducing the casts to signed
integers, and therefore the sign extension.

Signed-off-by: Paul Burton &lt;paul.burton@imgtec.com&gt;
Cc: stable@vger.kernel.org # v3.15+
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/7848/
Signed-off-by: Ralf Baechle &lt;ralf@linux-mips.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>Merge tag 'efi-urgent' of git://git.kernel.org/pub/scm/linux/kernel/git/mfleming/efi into x86/urgent</title>
<updated>2014-09-25T14:40:08+00:00</updated>
<author>
<name>Ingo Molnar</name>
<email>mingo@kernel.org</email>
</author>
<published>2014-09-25T14:40:08+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux.git/commit/?id=29282ac0bd6c0b0c4c893fe2c31863e50fea69f8'/>
<id>29282ac0bd6c0b0c4c893fe2c31863e50fea69f8</id>
<content type='text'>
Pull EFI fixes from Matt Fleming:

  * Revert the static library changes from the merge window since they're
    causing issues for Macbooks and Fedora + Grub2 (Matt Fleming)

  * Delete the misleading "setup_efi_pci() failed!" message which some
    people are seeing when booting EFI (Matt Fleming)

  * Fix printing strings from the 32-bit EFI boot stub by only passing
    32-bit addresses to the firmware (Matt Fleming)

Signed-off-by: Ingo Molnar &lt;mingo@kernel.org&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
Pull EFI fixes from Matt Fleming:

  * Revert the static library changes from the merge window since they're
    causing issues for Macbooks and Fedora + Grub2 (Matt Fleming)

  * Delete the misleading "setup_efi_pci() failed!" message which some
    people are seeing when booting EFI (Matt Fleming)

  * Fix printing strings from the 32-bit EFI boot stub by only passing
    32-bit addresses to the firmware (Matt Fleming)

Signed-off-by: Ingo Molnar &lt;mingo@kernel.org&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>x86/efi: Truncate 64-bit values when calling 32-bit OutputString()</title>
<updated>2014-09-24T20:56:46+00:00</updated>
<author>
<name>Matt Fleming</name>
<email>matt.fleming@intel.com</email>
</author>
<published>2014-09-24T10:56:10+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux.git/commit/?id=115c6628a59044958c205f8468a1b3ba3d539e61'/>
<id>115c6628a59044958c205f8468a1b3ba3d539e61</id>
<content type='text'>
If we're executing the 32-bit efi_char16_printk() code path (i.e.
running on top of 32-bit firmware) we know that efi_early-&gt;text_output
will be a 32-bit value, even though -&gt;text_output has type u64.

Unfortunately, we currently pass -&gt;text_output directly to
efi_early-&gt;call() so for CONFIG_X86_32 the compiler will push a 64-bit
value onto the stack, causing the other parameters to be misaligned.

The way we handle this in the rest of the EFI boot stub is to pass
pointers as arguments to efi_early-&gt;call(), which automatically do the
right thing (pointers are 32-bit on CONFIG_X86_32, and we simply ignore
the upper 32-bits of the argument register if running in 64-bit mode
with 32-bit firmware).

This fixes a corruption bug when printing strings from the 32-bit EFI
boot stub.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=84241
Signed-off-by: Matt Fleming &lt;matt.fleming@intel.com&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
If we're executing the 32-bit efi_char16_printk() code path (i.e.
running on top of 32-bit firmware) we know that efi_early-&gt;text_output
will be a 32-bit value, even though -&gt;text_output has type u64.

Unfortunately, we currently pass -&gt;text_output directly to
efi_early-&gt;call() so for CONFIG_X86_32 the compiler will push a 64-bit
value onto the stack, causing the other parameters to be misaligned.

The way we handle this in the rest of the EFI boot stub is to pass
pointers as arguments to efi_early-&gt;call(), which automatically do the
right thing (pointers are 32-bit on CONFIG_X86_32, and we simply ignore
the upper 32-bits of the argument register if running in 64-bit mode
with 32-bit firmware).

This fixes a corruption bug when printing strings from the 32-bit EFI
boot stub.

Link: https://bugzilla.kernel.org/show_bug.cgi?id=84241
Signed-off-by: Matt Fleming &lt;matt.fleming@intel.com&gt;
</pre>
</div>
</content>
</entry>
<entry>
<title>Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net</title>
<updated>2014-09-24T19:45:24+00:00</updated>
<author>
<name>Linus Torvalds</name>
<email>torvalds@linux-foundation.org</email>
</author>
<published>2014-09-24T19:45:24+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux.git/commit/?id=b94d525e58dc9638dd3f98094cb468bcfb262039'/>
<id>b94d525e58dc9638dd3f98094cb468bcfb262039</id>
<content type='text'>
Pull networking fixes from David Miller:
 "Here is a quick pull request primarily meant to address the deconfig
  fallout from changing SCSI_NETLINK from being used via 'select' to
  being used via 'depends'.

  I applied a set of 5 patches written by Michal Marek, and then I
  carefully audited all of the remaining config files, basically:

   1) I scanned every arch config file, and if it mentioned CONFIG_INET
      or CONFIG_UNIX, I made sure it had CONFIG_NET=y

   2) After that, I scanned every arch config file, and if it did not
      have CONFIG_NET=y I made sure it did not reference any networking
      config options.

  Finally, we have some late breaking wireless fixes in here from John
  Linville and co"

[ And there's a sparc bpf fix snuck in too ]

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net:
  sparc: bpf_jit: fix loads from negative offsets
  parisc: Update defconfigs which were missing CONFIG_NET.
  powerpc: Update defconfigs which were missing CONFIG_NET.
  s390: Update defconfigs which were missing CONFIG_NET.
  mips: Update some more defconfigs which were missing CONFIG_NET.
  sparc: Set CONFIG_NET=y in defconfigs
  sh: Set CONFIG_NET=y in defconfigs
  powerpc: Set CONFIG_NET=y in defconfigs
  parisc: Set CONFIG_NET=y in defconfigs
  mips: Set CONFIG_NET=y in defconfigs
  brcmfmac: Fix off by one bug in brcmf_count_20mhz_channels()
  ath9k: Fix NULL pointer dereference on early irq
  net: rfkill: gpio: Fix clock status
  NFC: st21nfca: Fix potential depmod dependency cycle
  NFC: st21nfcb: Fix depmod dependency cycle
  NFC: microread: Potential overflows in microread_target_discovered()
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
Pull networking fixes from David Miller:
 "Here is a quick pull request primarily meant to address the deconfig
  fallout from changing SCSI_NETLINK from being used via 'select' to
  being used via 'depends'.

  I applied a set of 5 patches written by Michal Marek, and then I
  carefully audited all of the remaining config files, basically:

   1) I scanned every arch config file, and if it mentioned CONFIG_INET
      or CONFIG_UNIX, I made sure it had CONFIG_NET=y

   2) After that, I scanned every arch config file, and if it did not
      have CONFIG_NET=y I made sure it did not reference any networking
      config options.

  Finally, we have some late breaking wireless fixes in here from John
  Linville and co"

[ And there's a sparc bpf fix snuck in too ]

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net:
  sparc: bpf_jit: fix loads from negative offsets
  parisc: Update defconfigs which were missing CONFIG_NET.
  powerpc: Update defconfigs which were missing CONFIG_NET.
  s390: Update defconfigs which were missing CONFIG_NET.
  mips: Update some more defconfigs which were missing CONFIG_NET.
  sparc: Set CONFIG_NET=y in defconfigs
  sh: Set CONFIG_NET=y in defconfigs
  powerpc: Set CONFIG_NET=y in defconfigs
  parisc: Set CONFIG_NET=y in defconfigs
  mips: Set CONFIG_NET=y in defconfigs
  brcmfmac: Fix off by one bug in brcmf_count_20mhz_channels()
  ath9k: Fix NULL pointer dereference on early irq
  net: rfkill: gpio: Fix clock status
  NFC: st21nfca: Fix potential depmod dependency cycle
  NFC: st21nfcb: Fix depmod dependency cycle
  NFC: microread: Potential overflows in microread_target_discovered()
</pre>
</div>
</content>
</entry>
<entry>
<title>sparc: bpf_jit: fix loads from negative offsets</title>
<updated>2014-09-24T19:04:07+00:00</updated>
<author>
<name>Alexei Starovoitov</name>
<email>ast@plumgrid.com</email>
</author>
<published>2014-09-23T20:50:10+00:00</published>
<link rel='alternate' type='text/html' href='https://git.tavy.me/linux.git/commit/?id=35607b02dbef304fa5037236a3b43c1d8ab2aa52'/>
<id>35607b02dbef304fa5037236a3b43c1d8ab2aa52</id>
<content type='text'>
- fix BPF_LD|ABS|IND from negative offsets:
  make sure to sign extend lower 32 bits in 64-bit register
  before calling C helpers from JITed code, otherwise 'int k'
  argument of bpf_internal_load_pointer_neg_helper() function
  will be added as large unsigned integer, causing packet size
  check to trigger and abort the program.

  It's worth noting that JITed code for 'A = A op K' will affect
  upper 32 bits differently depending whether K is simm13 or not.
  Since small constants are sign extended, whereas large constants
  are stored in temp register and zero extended.
  That is ok and we don't have to pay a penalty of sign extension
  for every sethi, since all classic BPF instructions have 32-bit
  semantics and we only need to set correct upper bits when
  transitioning from JITed code into C.

- though instructions 'A &amp;= 0' and 'A *= 0' are odd, JIT compiler
  should not optimize them out

Signed-off-by: Alexei Starovoitov &lt;ast@plumgrid.com&gt;
Signed-off-by: David S. Miller &lt;davem@davemloft.net&gt;
</content>
<content type='xhtml'>
<div xmlns='http://www.w3.org/1999/xhtml'>
<pre>
- fix BPF_LD|ABS|IND from negative offsets:
  make sure to sign extend lower 32 bits in 64-bit register
  before calling C helpers from JITed code, otherwise 'int k'
  argument of bpf_internal_load_pointer_neg_helper() function
  will be added as large unsigned integer, causing packet size
  check to trigger and abort the program.

  It's worth noting that JITed code for 'A = A op K' will affect
  upper 32 bits differently depending whether K is simm13 or not.
  Since small constants are sign extended, whereas large constants
  are stored in temp register and zero extended.
  That is ok and we don't have to pay a penalty of sign extension
  for every sethi, since all classic BPF instructions have 32-bit
  semantics and we only need to set correct upper bits when
  transitioning from JITed code into C.

- though instructions 'A &amp;= 0' and 'A *= 0' are odd, JIT compiler
  should not optimize them out

Signed-off-by: Alexei Starovoitov &lt;ast@plumgrid.com&gt;
Signed-off-by: David S. Miller &lt;davem@davemloft.net&gt;
</pre>
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