linux-stable.git/arch, branch v4.4.55 Linux kernel stable tree s390/kdump: Use "LINUX" ELF note name instead of "CORE" 2017-03-18T11:09:58+00:00 Michael Holzheu holzheu@linux.vnet.ibm.com 2017-02-07T17:09:14+00:00 a084aeef5633db4f649b699785f79676cb71ba6c commit a4a81d8eebdc1d209d034f62a082a5131e4242b5 upstream. In binutils/libbfd (bfd/elf.c) it is enforced that all s390 specific ELF notes like e.g. NT_S390_PREFIX or NT_S390_CTRS have "LINUX" specified as note name. Otherwise the notes are ignored. For /proc/vmcore we currently use "CORE" for these notes. Up to now this has not been a real problem because the dump analysis tool "crash" does not check the note name. But it will break all programs that use libbfd for processing ELF notes. So fix this and use "LINUX" for all s390 specific notes to comply with libbfd. Reported-by: Philipp Rudo <prudo@linux.vnet.ibm.com> Reviewed-by: Philipp Rudo <prudo@linux.vnet.ibm.com> Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
commit a4a81d8eebdc1d209d034f62a082a5131e4242b5 upstream.

In binutils/libbfd (bfd/elf.c) it is enforced that all s390 specific ELF
notes like e.g. NT_S390_PREFIX or NT_S390_CTRS have "LINUX" specified
as note name. Otherwise the notes are ignored.

For /proc/vmcore we currently use "CORE" for these notes.

Up to now this has not been a real problem because the dump analysis tool
"crash" does not check the note name. But it will break all programs that
use libbfd for processing ELF notes.

So fix this and use "LINUX" for all s390 specific notes to comply with
libbfd.

Reported-by: Philipp Rudo <prudo@linux.vnet.ibm.com>
Reviewed-by: Philipp Rudo <prudo@linux.vnet.ibm.com>
Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
KVM: s390: Fix guest migration for huge guests resulting in panic 2017-03-18T11:09:58+00:00 Janosch Frank frankja@linux.vnet.ibm.com 2017-03-02T14:23:42+00:00 b0e85701a7766341618d5e924f29f359431f9c91 commit 2e4d88009f57057df7672fa69a32b5224af54d37 upstream. While we can technically not run huge page guests right now, we can setup a guest with huge pages. Trying to migrate it will trigger a VM_BUG_ON and, if the kernel is not configured to panic on a BUG, it will happily try to work on non-existing page table entries. With this patch, we always return "dirty" if we encounter a large page when migrating. This at least fixes the immediate problem until we have proper handling for both kind of pages. Fixes: 15f36eb ("KVM: s390: Add proper dirty bitmap support to S390 kvm.") Cc: <stable@vger.kernel.org> # 3.16+ Signed-off-by: Janosch Frank <frankja@linux.vnet.ibm.com> Acked-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
commit 2e4d88009f57057df7672fa69a32b5224af54d37 upstream.

While we can technically not run huge page guests right now, we can
setup a guest with huge pages. Trying to migrate it will trigger a
VM_BUG_ON and, if the kernel is not configured to panic on a BUG, it
will happily try to work on non-existing page table entries.

With this patch, we always return "dirty" if we encounter a large page
when migrating. This at least fixes the immediate problem until we
have proper handling for both kind of pages.

Fixes: 15f36eb ("KVM: s390: Add proper dirty bitmap support to S390 kvm.")
Cc: <stable@vger.kernel.org> # 3.16+

Signed-off-by: Janosch Frank <frankja@linux.vnet.ibm.com>
Acked-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
powerpc: Emulation support for load/store instructions on LE 2017-03-18T11:09:57+00:00 Ravi Bangoria ravi.bangoria@linux.vnet.ibm.com 2017-02-14T09:16:42+00:00 2ca39d1300152e70977797c3e39c105adfcc0e0b commit e148bd17f48bd17fca2f4f089ec879fa6e47e34c upstream. emulate_step() uses a number of underlying kernel functions that were initially not enabled for LE. This has been rectified since. So, fix emulate_step() for LE for the corresponding instructions. Reported-by: Anton Blanchard <anton@samba.org> Signed-off-by: Ravi Bangoria <ravi.bangoria@linux.vnet.ibm.com> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
commit e148bd17f48bd17fca2f4f089ec879fa6e47e34c upstream.

emulate_step() uses a number of underlying kernel functions that were
initially not enabled for LE. This has been rectified since. So, fix
emulate_step() for LE for the corresponding instructions.

Reported-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Ravi Bangoria <ravi.bangoria@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
MIPS: Netlogic: Fix CP0_EBASE redefinition warnings 2017-03-18T11:09:57+00:00 James Hogan james.hogan@imgtec.com 2016-04-28T16:06:16+00:00 127651058594cafc624cf63bd266a42a62dfefcf commit 32eb6e8bee147b45e5e59230630d59541ccbb6e5 upstream. A couple of netlogic assembly files define CP0_EBASE to $15, the same as CP0_PRID in mipsregs.h, and use it for accessing both CP0_PRId and CP0_EBase registers. However commit 609cf6f2291a ("MIPS: CPS: Early debug using an ns16550-compatible UART") added a different definition of CP0_EBASE to mipsregs.h, which included a register select of 1. This causes harmless build warnings like the following: arch/mips/netlogic/common/reset.S:53:0: warning: "CP0_EBASE" redefined #define CP0_EBASE $15 ^ In file included from arch/mips/netlogic/common/reset.S:41:0: ./arch/mips/include/asm/mipsregs.h:63:0: note: this is the location of the previous definition #define CP0_EBASE $15, 1 ^ Update the code to use the definitions from mipsregs.h for accessing both registers. Fixes: 609cf6f2291a ("MIPS: CPS: Early debug using an ns16550-compatible UART") Signed-off-by: James Hogan <james.hogan@imgtec.com> Acked-by: Jayachandran C <jchandra@broadcom.com> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/13183/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
commit 32eb6e8bee147b45e5e59230630d59541ccbb6e5 upstream.

A couple of netlogic assembly files define CP0_EBASE to $15, the same as
CP0_PRID in mipsregs.h, and use it for accessing both CP0_PRId and
CP0_EBase registers. However commit 609cf6f2291a ("MIPS: CPS: Early
debug using an ns16550-compatible UART") added a different definition of
CP0_EBASE to mipsregs.h, which included a register select of 1. This
causes harmless build warnings like the following:

  arch/mips/netlogic/common/reset.S:53:0: warning: "CP0_EBASE" redefined
  #define CP0_EBASE $15
  ^
  In file included from arch/mips/netlogic/common/reset.S:41:0:
  ./arch/mips/include/asm/mipsregs.h:63:0: note: this is the location of the previous definition
  #define CP0_EBASE $15, 1
  ^

Update the code to use the definitions from mipsregs.h for accessing
both registers.

Fixes: 609cf6f2291a ("MIPS: CPS: Early debug using an ns16550-compatible UART")
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Acked-by: Jayachandran C <jchandra@broadcom.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/13183/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
MIPS: DEC: Avoid la pseudo-instruction in delay slots 2017-03-18T11:09:57+00:00 Ralf Baechle ralf@linux-mips.org 2016-09-20T12:33:01+00:00 2e4aff2405af6a4573299dee361a44903c9bb717 commit 3021773c7c3e75e20b693931a19362681e744ea9 upstream. When expanding the la or dla pseudo-instruction in a delay slot the GNU assembler will complain should the pseudo-instruction expand to multiple actual instructions, since only the first of them will be in the delay slot leading to the pseudo-instruction being only partially executed if the branch is taken. Use of PTR_LA in the dec int-handler.S leads to such warnings: arch/mips/dec/int-handler.S: Assembler messages: arch/mips/dec/int-handler.S:149: Warning: macro instruction expanded into multiple instructions in a branch delay slot arch/mips/dec/int-handler.S:198: Warning: macro instruction expanded into multiple instructions in a branch delay slot Avoid this by open coding the PTR_LA macros. Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
commit 3021773c7c3e75e20b693931a19362681e744ea9 upstream.

When expanding the la or dla pseudo-instruction in a delay slot the GNU
assembler will complain should the pseudo-instruction expand to multiple
actual instructions, since only the first of them will be in the delay
slot leading to the pseudo-instruction being only partially executed if
the branch is taken. Use of PTR_LA in the dec int-handler.S leads to
such warnings:

  arch/mips/dec/int-handler.S: Assembler messages:
  arch/mips/dec/int-handler.S:149: Warning: macro instruction expanded into multiple instructions in a branch delay slot
  arch/mips/dec/int-handler.S:198: Warning: macro instruction expanded into multiple instructions in a branch delay slot

Avoid this by open coding the PTR_LA macros.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
MIPS: ralink: Remove unused rt*_wdt_reset functions 2017-03-18T11:09:56+00:00 Arnd Bergmann arnd@arndb.de 2017-01-17T15:18:43+00:00 32883383f5e0c95436c2affaad675245727c0493 commit 886f9c69fc68f56ddea34d3de51ac1fc2ac8dfbc upstream. All pointers to these functions were removed, so now they produce warnings: arch/mips/ralink/rt305x.c:92:13: error: 'rt305x_wdt_reset' defined but not used [-Werror=unused-function] This removes the functions. If we need them again, the patch can be reverted later. Fixes: f576fb6a0700 ("MIPS: ralink: cleanup the soc specific pinmux data") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Cc: John Crispin <john@phrozen.org> Cc: Colin Ian King <colin.king@canonical.com> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/15044/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
commit 886f9c69fc68f56ddea34d3de51ac1fc2ac8dfbc upstream.

All pointers to these functions were removed, so now they produce
warnings:

arch/mips/ralink/rt305x.c:92:13: error: 'rt305x_wdt_reset' defined but not used [-Werror=unused-function]

This removes the functions. If we need them again, the patch can be
reverted later.

Fixes: f576fb6a0700 ("MIPS: ralink: cleanup the soc specific pinmux data")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: John Crispin <john@phrozen.org>
Cc: Colin Ian King <colin.king@canonical.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/15044/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
MIPS: ralink: Cosmetic change to prom_init(). 2017-03-18T11:09:56+00:00 John Crispin john@phrozen.org 2016-12-20T18:12:46+00:00 4b91e7a2a9a78b161caebfa5fcf6372a40161699 commit 9c48568b3692f1a56cbf1935e4eea835e6b185b1 upstream. Over the years the code has been changed various times leading to argc/argv being defined in a different function to where we actually use the variables. Clean this up by moving them to prom_init_cmdline(). Signed-off-by: John Crispin <john@phrozen.org> Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/14902/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
commit 9c48568b3692f1a56cbf1935e4eea835e6b185b1 upstream.

Over the years the code has been changed various times leading to
argc/argv being defined in a different function to where we actually
use the variables. Clean this up by moving them to prom_init_cmdline().

Signed-off-by: John Crispin <john@phrozen.org>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/14902/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
MIPS: Update lemote2f_defconfig for CPU_FREQ_STAT change 2017-03-18T11:09:56+00:00 Arnd Bergmann arnd@arndb.de 2017-01-11T14:29:49+00:00 d2a8d746ae9530aeea0a3b4b129c970ffc90d926 commit b3f6046186ef45acfeebc5a59c9fb45cefc685e7 upstream. Since linux-4.8, CPU_FREQ_STAT is a bool symbol, causing a warning in kernelci.org: arch/mips/configs/lemote2f_defconfig:42:warning: symbol value 'm' invalid for CPU_FREQ_STAT This updates the defconfig to have the feature built-in. Fixes: 1aefc75b2449 ("cpufreq: stats: Make the stats code non-modular") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/15000/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
commit b3f6046186ef45acfeebc5a59c9fb45cefc685e7 upstream.

Since linux-4.8, CPU_FREQ_STAT is a bool symbol, causing a warning in
kernelci.org:

arch/mips/configs/lemote2f_defconfig:42:warning: symbol value 'm' invalid for CPU_FREQ_STAT

This updates the defconfig to have the feature built-in.

Fixes: 1aefc75b2449 ("cpufreq: stats: Make the stats code non-modular")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/15000/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
MIPS: ip22: Fix ip28 build for modern gcc 2017-03-18T11:09:56+00:00 Arnd Bergmann arnd@arndb.de 2017-01-17T15:18:46+00:00 c018595d83a39dc4156f46ac21955778835e7781 commit 23ca9b522383d3b9b7991d8586db30118992af4a upstream. kernelci reports a failure of the ip28_defconfig build after upgrading its gcc version: arch/mips/sgi-ip22/Platform:29: *** gcc doesn't support needed option -mr10k-cache-barrier=store. Stop. The problem apparently is that the -mr10k-cache-barrier=store option is now rejected for CPUs other than r10k. Explicitly including the CPU in the check fixes this and is safe because both options were introduced in gcc-4.4. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/15049/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
commit 23ca9b522383d3b9b7991d8586db30118992af4a upstream.

kernelci reports a failure of the ip28_defconfig build after upgrading its
gcc version:

arch/mips/sgi-ip22/Platform:29: *** gcc doesn't support needed option -mr10k-cache-barrier=store.  Stop.

The problem apparently is that the -mr10k-cache-barrier=store option is now
rejected for CPUs other than r10k. Explicitly including the CPU in the
check fixes this and is safe because both options were introduced in
gcc-4.4.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/15049/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
MIPS: Update ip27_defconfig for SCSI_DH change 2017-03-18T11:09:56+00:00 Arnd Bergmann arnd@arndb.de 2017-01-11T14:29:50+00:00 7a6a965f350ec47171184898368a17b8228cdaf9 commit ea58fca1842a5dc410cae4167b01643db971a4e2 upstream. Since linux-4.3, SCSI_DH is a bool symbol, causing a warning in kernelci.org: arch/mips/configs/ip27_defconfig:136:warning: symbol value 'm' invalid for SCSI_DH This updates the defconfig to have the feature built-in. Fixes: 086b91d052eb ("scsi_dh: integrate into the core SCSI code") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/15001/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
commit ea58fca1842a5dc410cae4167b01643db971a4e2 upstream.

Since linux-4.3, SCSI_DH is a bool symbol, causing a warning in
kernelci.org:

arch/mips/configs/ip27_defconfig:136:warning: symbol value 'm' invalid for SCSI_DH

This updates the defconfig to have the feature built-in.

Fixes: 086b91d052eb ("scsi_dh: integrate into the core SCSI code")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/15001/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>