linux-stable.git/arch/xtensa/include, branch v3.12.45

xtensa: provide __NR_sync_file_range2 instead of __NR_sync_file_range

2015-05-04T09:50:13+00:00

commit 01e84c70fe40c8111f960987bcf7f931842e6d07 upstream.

xtensa actually uses sync_file_range2 implementation, so it should
define __NR_sync_file_range2 as other architectures that use that
function. That fixes userspace interface (that apparently never worked)
and avoids special-casing xtensa in libc implementations.
See the thread ending at
http://lists.busybox.net/pipermail/uclibc/2015-February/048833.html
for more details.

Signed-off-by: Max Filippov 
Signed-off-by: Jiri Slaby

xtensa: re-wire umount syscall to sys_oldumount

2014-11-19T17:38:17+00:00

commit 2651cc6974d47fc43bef1cd8cd26966e4f5ba306 upstream.

Userspace actually passes single parameter (path name) to the umount
syscall, so new umount just fails. Fix it by requesting old umount
syscall implementation and re-wiring umount to it.

Signed-off-by: Max Filippov 
Signed-off-by: Jiri Slaby

xtensa: fix TLBTEMP_BASE_2 region handling in fast_second_level_miss

2014-10-13T13:40:52+00:00

commit 7128039fe2dd3d59da9e4ffa036f3aaa3ba87b9f upstream.

Current definition of TLBTEMP_BASE_2 is always 32K above the
TLBTEMP_BASE_1, whereas fast_second_level_miss handler for the TLBTEMP
region analyzes virtual address bit (PAGE_SHIFT + DCACHE_ALIAS_ORDER)
to determine TLBTEMP region where the fault happened. The size of the
TLBTEMP region is also checked incorrectly: not 64K, but twice data
cache way size (whicht may as well be less than the instruction cache
way size).

Fix TLBTEMP_BASE_2 to be TLBTEMP_BASE_1 + data cache way size.
Provide TLBTEMP_SIZE that is a greater of doubled data cache way size or
the instruction cache way size, and use it to determine if the second
level TLB miss occured in the TLBTEMP region.

Practical occurence of page faults in the TLBTEMP area is extremely
rare, this code can be tested by deletion of all w[di]tlb instructions
in the tlbtemp_mapping region.

Signed-off-by: Max Filippov 
Signed-off-by: Jiri Slaby

xtensa: fix access to THREAD_RA/THREAD_SP/THREAD_DS

2014-10-13T13:40:51+00:00

commit 52247123749cc3cbc30168b33ad8c69515c96d23 upstream.

With SMP and a lot of debug options enabled task_struct::thread gets out
of reach of s32i/l32i instructions with base pointing at task_struct,
breaking build with the following messages:

  arch/xtensa/kernel/entry.S: Assembler messages:
  arch/xtensa/kernel/entry.S:1002: Error: operand 3 of 'l32i.n' has invalid value '1048'
  arch/xtensa/kernel/entry.S:1831: Error: operand 3 of 's32i.n' has invalid value '1040'
  arch/xtensa/kernel/entry.S:1832: Error: operand 3 of 's32i.n' has invalid value '1044'

Change base to point to task_struct::thread in such cases.
Don't use a10 in _switch_to to save/restore prev pointer as a2 is not
clobbered.

Signed-off-by: Max Filippov 
Signed-off-by: Jiri Slaby

xtensa: replace IOCTL code definitions with constants

2014-10-13T13:40:50+00:00

commit f61bf8e7d19e0a3456a7a9ed97c399e4353698dc upstream.

This fixes userspace code that builds on other architectures but fails
on xtensa due to references to structures that other architectures don't
refer to. E.g. this fixes the following issue with python-2.7.8:

  python-2.7.8/Modules/termios.c:861:25: error: invalid application
     of 'sizeof' to incomplete type 'struct serial_multiport_struct'
     {"TIOCSERGETMULTI", TIOCSERGETMULTI},
  python-2.7.8/Modules/termios.c:870:25: error: invalid application
     of 'sizeof' to incomplete type 'struct serial_multiport_struct'
     {"TIOCSERSETMULTI", TIOCSERSETMULTI},
  python-2.7.8/Modules/termios.c:900:24: error: invalid application
     of 'sizeof' to incomplete type 'struct tty_struct'
     {"TIOCTTYGSTRUCT", TIOCTTYGSTRUCT},

Signed-off-by: Max Filippov 
Signed-off-by: Jiri Slaby

xtensa: introduce spill_registers_kernel macro

2014-03-05T16:13:53+00:00

commit e2fd1374c705abe4661df3fb6fadb3879c7c1846 upstream.

Most in-kernel users want registers spilled on the kernel stack and
don't require PS.EXCM to be set. That means that they don't need fixup
routine and could reuse regular window overflow mechanism for that,
which makes spill routine very simple.

Suggested-by: Chris Zankel 
Signed-off-by: Max Filippov 
Signed-off-by: Jiri Slaby

xtensa: remove CCOUNT_PER_JIFFY

2013-09-06T16:48:59+00:00

Use ccount_freq directly to make the code a little more readable.

Signed-off-by: Baruch Siach 
Signed-off-by: Max Filippov 
Signed-off-by: Chris Zankel

xtensa: fix !CONFIG_XTENSA_CALIBRATE_CCOUNT build failure

2013-09-06T16:48:51+00:00

Commits 925f5532 (xtensa: ccount based clockevent implementation) and e3f43291
(xtensa: ccount based sched_clock) introduced users of ccount_freq. This
variable doesn't exist when CONFIG_XTENSA_CALIBRATE_CCOUNT is disabled. Add
ccount_freq definition in this case.

Reported-by: Chen Gang 
Signed-off-by: Baruch Siach 
Signed-off-by: Max Filippov 
Signed-off-by: Chris Zankel

xtensa: keep a3 and excsave1 on entry to exception handlers

2013-09-06T16:47:41+00:00

Based on the SMP patch by Joe Taylor and subsequent fixes.
Preserve exception table pointer (normally stored in excsave1 SR) as it
cannot be easily restored in SMP environment.

Signed-off-by: Max Filippov 
Signed-off-by: Chris Zankel

Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net

2013-07-14T00:42:22+00:00

Pull networking fixes from David Miller:
 "Just a bunch of small fixes and tidy ups:

   1) Finish the "busy_poll" renames, from Eliezer Tamir.

   2) Fix RCU stalls in IFB driver, from Ding Tianhong.

   3) Linearize buffers properly in tun/macvtap zerocopy code.

   4) Don't crash on rmmod in vxlan, from Pravin B Shelar.

   5) Spinlock used before init in alx driver, from Maarten Lankhorst.

   6) A sparse warning fix in bnx2x broke TSO checksums, fix from Dmitry
      Kravkov.

   7) Dummy and ifb driver load failure paths can oops, fixes from Tan
      Xiaojun and Ding Tianhong.

   8) Correct MTU calculations in IP tunnels, from Alexander Duyck.

   9) Account all TCP retransmits in SNMP stats properly, from Yuchung
      Cheng.

  10) atl1e and via-rhine do not handle DMA mapping failures properly,
      from Neil Horman.

  11) Various equal-cost multipath route fixes in ipv6 from Hannes
      Frederic Sowa"

* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: (36 commits)
  ipv6: only static routes qualify for equal cost multipathing
  via-rhine: fix dma mapping errors
  atl1e: fix dma mapping warnings
  tcp: account all retransmit failures
  usb/net/r815x: fix cast to restricted __le32
  usb/net/r8152: fix integer overflow in expression
  net: access page->private by using page_private
  net: strict_strtoul is obsolete, use kstrtoul instead
  drivers/net/ieee802154: don't use devm_pinctrl_get_select_default() in probe
  drivers/net/ethernet/cadence: don't use devm_pinctrl_get_select_default() in probe
  drivers/net/can/c_can: don't use devm_pinctrl_get_select_default() in probe
  net/usb: add relative mii functions for r815x
  net/tipc: use %*phC to dump small buffers in hex form
  qlcnic: Adding Maintainers.
  gre: Fix MTU sizing check for gretap tunnels
  pkt_sched: sch_qfq: remove forward declaration of qfq_update_agg_ts
  pkt_sched: sch_qfq: improve efficiency of make_eligible
  gso: Update tunnel segmentation to support Tx checksum offload
  inet: fix spacing in assignment
  ifb: fix oops when loading the ifb failed
  ...