1. 24 Apr, 2014 4 commits
  2. 13 Apr, 2014 1 commit
  3. 12 Apr, 2014 10 commits
  4. 11 Apr, 2014 7 commits
  5. 10 Apr, 2014 3 commits
  6. 09 Apr, 2014 15 commits
    • Jan-Simon Möller's avatar
      x86 kbuild: LLVMLinux: More cc-options added for clang · fd2d0a19
      Jan-Simon Möller authored
      Protect more options for x86 with cc-option so that we don't get errors when
      using clang instead of gcc.  Add more or different options when using clang as
      well. Also need to enforce that SSE is off for clang and the stack is 8-byte
      aligned.
      Signed-off-by: default avatarJan-Simon Möller <dl9pf@gmx.de>
      Signed-off-by: default avatarBehan Webster <behanw@converseincode.com>
      Signed-off-by: default avatarMark Charlebois <charlebm@gmail.com>
      fd2d0a19
    • Catalin Marinas's avatar
      ARM: 8018/1: Add {inc,dec}_preempt_count asm macros · 0b1f68e8
      Catalin Marinas authored
      The patch adds asm macros for inc_preempt_count and dec_preempt_count_ti
      (which also gets the current thread_info) instead of open-coding them in
      arch/arm/vfp/*.S files.
      Signed-off-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
      Tested-by: default avatarArun KS <getarunks@gmail.com>
      Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
      0b1f68e8
    • Catalin Marinas's avatar
      ARM: 8017/1: Move asm macro get_thread_info to asm/assembler.h · 39ad04cc
      Catalin Marinas authored
      asm/assembler.h is a better place for this macro since it is used by
      asm files outside arch/arm/kernel/
      Signed-off-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
      Tested-by: default avatarArun KS <getarunks@gmail.com>
      Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
      39ad04cc
    • Stewart Smith's avatar
      powerpc/powernv Adapt opal-elog and opal-dump to new sysfs_remove_file_self · cc4f265a
      Stewart Smith authored
      We are currently using sysfs_schedule_callback() which is deprecated
      and about to be removed. Switch to the new interface instead.
      Signed-off-by: default avatarStewart Smith <stewart@linux.vnet.ibm.com>
      Signed-off-by: Benjamin Herrenschmidt's avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
      cc4f265a
    • Michael Wang's avatar
      power, sched: stop updating inside arch_update_cpu_topology() when nothing to be update · 9a013361
      Michael Wang authored
      Since v1:
      	Edited the comment according to Srivatsa's suggestion.
      
      During the testing, we encounter below WARN followed by Oops:
      
      	WARNING: at kernel/sched/core.c:6218
      	...
      	NIP [c000000000101660] .build_sched_domains+0x11d0/0x1200
      	LR [c000000000101358] .build_sched_domains+0xec8/0x1200
      	PACATMSCRATCH [800000000000f032]
      	Call Trace:
      	[c00000001b103850] [c000000000101358] .build_sched_domains+0xec8/0x1200
      	[c00000001b1039a0] [c00000000010aad4] .partition_sched_domains+0x484/0x510
      	[c00000001b103aa0] [c00000000016d0a8] .rebuild_sched_domains+0x68/0xa0
      	[c00000001b103b30] [c00000000005cbf0] .topology_work_fn+0x10/0x30
      	...
      	Oops: Kernel access of bad area, sig: 11 [#1]
      	...
      	NIP [c00000000045c000] .__bitmap_weight+0x60/0xf0
      	LR [c00000000010132c] .build_sched_domains+0xe9c/0x1200
      	PACATMSCRATCH [8000000000029032]
      	Call Trace:
      	[c00000001b1037a0] [c000000000288ff4] .kmem_cache_alloc_node_trace+0x184/0x3a0
      	[c00000001b103850] [c00000000010132c] .build_sched_domains+0xe9c/0x1200
      	[c00000001b1039a0] [c00000000010aad4] .partition_sched_domains+0x484/0x510
      	[c00000001b103aa0] [c00000000016d0a8] .rebuild_sched_domains+0x68/0xa0
      	[c00000001b103b30] [c00000000005cbf0] .topology_work_fn+0x10/0x30
      	...
      
      This was caused by that 'sd->groups == NULL' after building groups, which
      was caused by the empty 'sd->span'.
      
      The cpu's domain contained nothing because the cpu was assigned to a wrong
      node, due to the following unfortunate sequence of events:
      
      1. The hypervisor sent a topology update to the guest OS, to notify changes
         to the cpu-node mapping. However, the update was actually redundant - i.e.,
         the "new" mapping was exactly the same as the old one.
      
      2. Due to this, the 'updated_cpus' mask turned out to be empty after exiting
         the 'for-loop' in arch_update_cpu_topology().
      
      3. So we ended up calling stop-machine() with an empty cpumask list, which made
         stop-machine internally elect cpumask_first(cpu_online_mask), i.e., CPU0 as
         the cpu to run the payload (the update_cpu_topology() function).
      
      4. This causes update_cpu_topology() to be run by CPU0. And since 'updates'
         is kzalloc()'ed inside arch_update_cpu_topology(), update_cpu_topology()
         finds update->cpu as well as update->new_nid to be 0. In other words, we
         end up assigning CPU0 (and eventually its siblings) to node 0, incorrectly.
      
      Along with the following wrong updating, it causes the sched-domain rebuild
      code to break and crash the system.
      
      Fix this by skipping the topology update in cases where we find that
      the topology has not actually changed in reality (ie., spurious updates).
      
      CC: Benjamin Herrenschmidt <benh@kernel.crashing.org>
      CC: Paul Mackerras <paulus@samba.org>
      CC: Nathan Fontenot <nfont@linux.vnet.ibm.com>
      CC: Stephen Rothwell <sfr@canb.auug.org.au>
      CC: Andrew Morton <akpm@linux-foundation.org>
      CC: Robert Jennings <rcj@linux.vnet.ibm.com>
      CC: Jesse Larrew <jlarrew@linux.vnet.ibm.com>
      CC: "Srivatsa S. Bhat" <srivatsa.bhat@linux.vnet.ibm.com>
      CC: Alistair Popple <alistair@popple.id.au>
      Suggested-by: default avatar"Srivatsa S. Bhat" <srivatsa.bhat@linux.vnet.ibm.com>
      Signed-off-by: default avatarMichael Wang <wangyun@linux.vnet.ibm.com>
      Reviewed-by: default avatarSrivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com>
      Signed-off-by: Benjamin Herrenschmidt's avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
      9a013361
    • Tony Breeds's avatar
      powerpc/le: Avoid creatng R_PPC64_TOCSAVE relocations for modules. · d3d35d95
      Tony Breeds authored
      When building modules with a native le toolchain the linker will
      generate R_PPC64_TOCSAVE relocations when it's safe to omit saving r2 on
      a plt call.  This isn't helpful in the conext of a kernel module and the
      kernel will fail to load those modules with an error like:
      	nf_conntrack: Unknown ADD relocation: 109
      
      This patch tells the linker to avoid createing R_PPC64_TOCSAVE
      relocations allowing modules to load.
      Signed-off-by: default avatarTony Breeds <tony@bakeyournoodle.com>
      Signed-off-by: default avatarAnton Blanchard <anton@samba.org>
      Signed-off-by: Benjamin Herrenschmidt's avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
      d3d35d95
    • Monam Agarwal's avatar
      arch/powerpc: Use RCU_INIT_POINTER(x, NULL) in platforms/cell/spu_syscalls.c · 282efb70
      Monam Agarwal authored
      Here rcu_assign_pointer() is ensuring that the
      initialization of a structure is carried out before storing a pointer
      to that structure.
      So, rcu_assign_pointer(p, NULL) can always safely be converted to
      RCU_INIT_POINTER(p, NULL).
      Signed-off-by: default avatarMonam Agarwal <monamagarwal123@gmail.com>
      Signed-off-by: Benjamin Herrenschmidt's avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
      282efb70
    • Michael Neuling's avatar
      powerpc/opal: Add missing include · bfd25d72
      Michael Neuling authored
      next-20140324 currently fails compiling celleb_defconfig with:
      
      arch/powerpc/include/asm/opal.h:894:42: error: 'struct notifier_block' declared inside parameter list [-Werror]
      arch/powerpc/include/asm/opal.h:894:42: error: its scope is only this definition or declaration, which is probably not what you want [-Werror]
      arch/powerpc/include/asm/opal.h:896:14: error: 'struct notifier_block' declared inside parameter list [-Werror]
      
      This is due to a missing include which is added here.
      Signed-off-by: default avatarMichael Neuling <mikey@neuling.org>
      Signed-off-by: Benjamin Herrenschmidt's avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
      bfd25d72
    • Joe Perches's avatar
      powerpc: Convert last uses of __FUNCTION__ to __func__ · aba6f4f2
      Joe Perches authored
      Just about all of these have been converted to __func__,
      so convert the last uses.
      Signed-off-by: default avatarJoe Perches <joe@perches.com>
      Signed-off-by: Benjamin Herrenschmidt's avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
      aba6f4f2
    • Anton Blanchard's avatar
      powerpc: Add lq/stq emulation · f83319d7
      Anton Blanchard authored
      Recent CPUs support quad word load and store instructions. Add
      support to the alignment handler for them.
      Signed-off-by: default avatarAnton Blanchard <anton@samba.org>
      Signed-off-by: Benjamin Herrenschmidt's avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
      f83319d7
    • Joel Stanley's avatar
      powerpc/powernv: Add invalid OPAL call · e28b05e7
      Joel Stanley authored
      This call will not be understood by OPAL, and cause it to add an error
      to it's log. Among other things, this is useful for testing the
      behaviour of the log as it fills up.
      Signed-off-by: Joel Stanley's avatarJoel Stanley <joel@jms.id.au>
      Signed-off-by: Benjamin Herrenschmidt's avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
      e28b05e7
    • Joel Stanley's avatar
      powerpc/powernv: Add OPAL message log interface · bfc36894
      Joel Stanley authored
      OPAL provides an in-memory circular buffer containing a message log
      populated with various runtime messages produced by the firmware.
      
      Provide a sysfs interface /sys/firmware/opal/msglog for userspace to
      view the messages.
      Signed-off-by: Joel Stanley's avatarJoel Stanley <joel@jms.id.au>
      Signed-off-by: Benjamin Herrenschmidt's avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
      bfc36894
    • Mahesh Salgaonkar's avatar
      powerpc/book3s: Fix mc_recoverable_range buffer overrun issue. · 6e556b47
      Mahesh Salgaonkar authored
      Currently we wrongly allocate mc_recoverable_range buffer (to hold
      recoverable ranges) based on size of the property "mcheck-recoverable-ranges".
      This results in allocating less memory to hold available recoverable range
      entries from /proc/device-tree/ibm,opal/mcheck-recoverable-ranges.
      
      This patch fixes this issue by allocating mc_recoverable_range buffer based
      on number of entries of recoverable ranges instead of device property size.
      Without this change we end up allocating less memory and run into memory
      corruption issue.
      Signed-off-by: default avatarMahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
      Signed-off-by: Benjamin Herrenschmidt's avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
      6e556b47
    • Michael Neuling's avatar
      powerpc: Remove dead code in sycall entry · fa5c11b7
      Michael Neuling authored
      In:
        commit 742415d6
        Author: Michael Neuling <mikey@neuling.org>
        powerpc: Turn syscall handler into macros
      
      We converted the syscall entry code onto macros, but in doing this we
      introduced some cruft that's never run and should never have been added.
      
      This removes that code.
      Signed-off-by: default avatarMichael Neuling <mikey@neuling.org>
      Signed-off-by: Benjamin Herrenschmidt's avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
      fa5c11b7
    • Li Zhong's avatar
      powerpc: Use of_node_init() for the fakenode in msi_bitmap.c · e47ff70a
      Li Zhong authored
      This patch uses of_node_init() to initialize the kobject in the fake
      node used in test_of_node(), to avoid following kobject warning.
      
      [    0.897654] kobject: '(null)' (c0000007ca183a08): is not initialized, yet kobject_put() is being called.
      [    0.897682] ------------[ cut here ]------------
      [    0.897688] WARNING: at lib/kobject.c:670
      [    0.897692] Modules linked in:
      [    0.897701] CPU: 4 PID: 1 Comm: swapper/0 Not tainted 3.14.0+ #1
      [    0.897708] task: c0000007ca100000 ti: c0000007ca180000 task.ti: c0000007ca180000
      [    0.897715] NIP: c00000000046a1f0 LR: c00000000046a1ec CTR: 0000000001704660
      [    0.897721] REGS: c0000007ca1835c0 TRAP: 0700   Not tainted  (3.14.0+)
      [    0.897727] MSR: 8000000000029032 <SF,EE,ME,IR,DR,RI>  CR: 28000024  XER: 0000000d
      [    0.897749] CFAR: c0000000008ef4ec SOFTE: 1
      GPR00: c00000000046a1ec c0000007ca183840 c0000000014c59b8 000000000000005c
      GPR04: 0000000000000001 c000000000129770 0000000000000000 0000000000000001
      GPR08: 0000000000000000 0000000000000000 0000000000000000 0000000000003fef
      GPR12: 0000000000000000 c00000000f221200 c00000000000c350 0000000000000000
      GPR16: 0000000000000000 0000000000000000 0000000000000000 0000000000000000
      GPR20: 0000000000000000 0000000000000000 0000000000000000 0000000000000000
      GPR24: 0000000000000000 c00000000144e808 c000000000c56f20 00000000000000d8
      GPR28: c000000000cd5058 0000000000000000 c000000001454ca8 c0000007ca183a08
      [    0.897856] NIP [c00000000046a1f0] .kobject_put+0xa0/0xb0
      [    0.897863] LR [c00000000046a1ec] .kobject_put+0x9c/0xb0
      [    0.897868] Call Trace:
      [    0.897874] [c0000007ca183840] [c00000000046a1ec] .kobject_put+0x9c/0xb0 (unreliable)
      [    0.897885] [c0000007ca1838c0] [c000000000743f9c] .of_node_put+0x2c/0x50
      [    0.897894] [c0000007ca183940] [c000000000c83954] .test_of_node+0x1dc/0x208
      [    0.897902] [c0000007ca183b80] [c000000000c839a4] .msi_bitmap_selftest+0x24/0x38
      [    0.897913] [c0000007ca183bf0] [c00000000000bb34] .do_one_initcall+0x144/0x200
      [    0.897922] [c0000007ca183ce0] [c000000000c748e4] .kernel_init_freeable+0x2b4/0x394
      [    0.897931] [c0000007ca183db0] [c00000000000c374] .kernel_init+0x24/0x130
      [    0.897940] [c0000007ca183e30] [c00000000000a2f4] .ret_from_kernel_thread+0x5c/0x68
      [    0.897947] Instruction dump:
      [    0.897952] 7fe3fb78 38210080 e8010010 ebe1fff8 7c0803a6 4800014c e89f0000 3c62ff6e
      [    0.897971] 7fe5fb78 3863a950 48485279 60000000 <0fe00000> 39000000 393f0038 4bffff80
      [    0.897992] ---[ end trace 1eeffdb9f825a556 ]---
      Signed-off-by: default avatarLi Zhong <zhong@linux.vnet.ibm.com>
      Signed-off-by: Benjamin Herrenschmidt's avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
      e47ff70a