1. 16 Oct, 2012 5 commits
  2. 15 Oct, 2012 3 commits
    • Randy Dunlap's avatar
      docbook: networking: fix file paths for uapi headers · 29bb4cc5
      Randy Dunlap authored
      Update file paths in Documentation/DocBook/networking.tmpl for uapi headers.
      Signed-off-by: default avatarRandy Dunlap <rdunlap@xenotime.net>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      29bb4cc5
    • Ralf Baechle's avatar
      mm: huge_memory: Fix build error. · 325adeb5
      Ralf Baechle authored
      Certain configurations won't implicitly pull in <linux/pagemap.h> resulting
      in the following build error:
      
        mm/huge_memory.c: In function 'release_pte_page':
        mm/huge_memory.c:1697:2: error: implicit declaration of function 'unlock_page' [-Werror=implicit-function-declaration]
        mm/huge_memory.c: In function '__collapse_huge_page_isolate':
        mm/huge_memory.c:1757:3: error: implicit declaration of function 'trylock_page' [-Werror=implicit-function-declaration]
        cc1: some warnings being treated as errors
      Reported-by: default avatarDavid Daney <david.daney@cavium.com>
      Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      325adeb5
    • Russell King's avatar
      ARM: fix oops on initial entry to userspace with Thumb2 kernels · 68687c84
      Russell King authored
      Daniel Mack reports an oops at boot with the latest kernels:
      
        Internal error: Oops - undefined instruction: 0 [#1] SMP THUMB2
        Modules linked in:
        CPU: 0    Not tainted  (3.6.0-11057-g584df1d #145)
        PC is at cpsw_probe+0x45a/0x9ac
        LR is at trace_hardirqs_on_caller+0x8f/0xfc
        pc : [<c03493de>]    lr : [<c005e81f>]    psr: 60000113
        sp : cf055fb0  ip : 00000000  fp : 00000000
        r10: 00000000  r9 : 00000000  r8 : 00000000
        r7 : 00000000  r6 : 00000000  r5 : c0344555  r4 : 00000000
        r3 : cf057a40  r2 : 00000000  r1 : 00000001  r0 : 00000000
        Flags: nZCv  IRQs on  FIQs on  Mode SVC_32  ISA ARM Segment user
        Control: 50c5387d  Table: 8f3f4019  DAC: 00000015
        Process init (pid: 1, stack limit = 0xcf054240)
        Stack: (0xcf055fb0 to 0xcf056000)
        5fa0:                                     00000001 00000000 00000000 00000000
        5fc0: cf055fb0 c000d1a8 00000000 00000000 00000000 00000000 00000000 00000000
        5fe0: 00000000 be9b3f10 00000000 b6f6add0 00000010 00000000 aaaabfaf a8babbaa
      
      The analysis of this is as follows.  In init/main.c, we issue:
      
      	kernel_thread(kernel_init, NULL, CLONE_FS | CLONE_SIGHAND);
      
      This creates a new thread, which falls through to the ret_from_fork
      assembly, with r4 set NULL and r5 set to kernel_init.  You can see
      this in your oops dump register set - r5 is 0xc0344555, which is the
      address of kernel_init plus 1 which marks the function as Thumb code.
      
      Now, let's look at this code a little closer - this is what the
      disassembly looks like:
      
        c000d180 <ret_from_fork>:
        c000d180:       f03a fe08       bl      c0047d94 <schedule_tail>
        c000d184:       2d00            cmp     r5, #0
        c000d186:       bf1e            ittt    ne
        c000d188:       4620            movne   r0, r4
        c000d18a:       46fe            movne   lr, pc <-- XXXXXXX
        c000d18c:       46af            movne   pc, r5
        c000d18e:       46e9            mov     r9, sp
        c000d190:       ea4f 3959       mov.w   r9, r9, lsr #13
        c000d194:       ea4f 3949       mov.w   r9, r9, lsl #13
        c000d198:       e7c8            b.n     c000d12c <ret_to_user>
        c000d19a:       bf00            nop
        c000d19c:       f3af 8000       nop.w
      
      This code was introduced in 9fff2fa0 (arm: switch to saner
      kernel_execve() semantics).  I have marked one instruction, and it's
      the significant one - I'll come back to that later.
      
      Eventually, having had a successful call to kernel_execve(), kernel_init()
      returns zero.
      
      In returning, it uses the value in 'lr' which was set by the instruction
      I marked above.  Unfortunately, this causes lr to contain 0xc000d18e -
      an even address.  This switches the ISA to ARM on return but with a non
      word aligned PC value.
      
      So, what do we end up executing?  Well, not the instructions above - yes
      the opcodes, but they don't mean the same thing in ARM mode.  In ARM mode,
      it looks like this instead:
      
        c000d18c:       46e946af        strbtmi r4, [r9], pc, lsr #13
        c000d190:       3959ea4f        ldmdbcc r9, {r0, r1, r2, r3, r6, r9, fp, sp, lr, pc}^
        c000d194:       3949ea4f        stmdbcc r9, {r0, r1, r2, r3, r6, r9, fp, sp, lr, pc}^
        c000d198:       bf00e7c8        svclt   0x0000e7c8
        c000d19c:       8000f3af        andhi   pc, r0, pc, lsr #7
        c000d1a0:       e88db092        stm     sp, {r1, r4, r7, ip, sp, pc}
        c000d1a4:       46e81fff                        ; <UNDEFINED> instruction: 0x46e81fff
        c000d1a8:       8a00f3ef        bhi     0xc004a16c
        c000d1ac:       0a0cf08a        beq     0xc03493dc
      
      I have included more above, because it's relevant.  The PSR flags which
      we can see in the oops dump are nZCv, so Z and C are set.
      
      All the above ARM instructions are not executed, except for two.
      c000d1a0, which has no writeback, and writes below the current stack
      pointer (and that data is lost when we take the next exception.) The
      other instruction which is executed is c000d1ac, which takes us to...
      0xc03493dc.  However, remember that bit 1 of the PC got set.  So that
      makes the PC value 0xc03493de.
      
      And that value is the value we find in the oops dump for PC.  What is
      the instruction here when interpreted in ARM mode?
      
             0:       f71e150c                ; <UNDEFINED> instruction: 0xf71e150c
      
      and there we have our undefined instruction (remember that the 'never'
      condition code, 0xf, has been deprecated and is now always executed as
      it is now being used for additional instructions.)
      
      This path also nicely explains the state of the stack we see in the oops
      dump too.
      
      The above is a consistent and sane story for how we got to the oops
      dump, which all stems from the instruction at 0xc000d18a being wrong.
      Reported-by: default avatarDaniel Mack <zonque@gmail.com>
      Tested-by: default avatarDaniel Mack <zonque@gmail.com>
      Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      68687c84
  3. 14 Oct, 2012 6 commits
    • Linus Torvalds's avatar
      Linux 3.7-rc1 · ddffeb8c
      Linus Torvalds authored
      ddffeb8c
    • Linus Torvalds's avatar
      Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus · a5ef3f7d
      Linus Torvalds authored
      Pull MIPS update from Ralf Baechle:
       "Cleanups and fixes for breakage that occured earlier during this merge
        phase.  Also a few patches that didn't make the first pull request.
        Of those is the Alchemy work that merges code for many of the SOCs and
        evaluation boards thus among other code shrinkage, reduces the number
        of MIPS defconfigs by 5."
      
      * 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus: (22 commits)
        MIPS: SNI: Switch RM400 serial to SCCNXP driver
        MIPS: Remove unused empty_bad_pmd_table[] declaration.
        MIPS: MT: Remove kspd.
        MIPS: Malta: Fix section mismatch.
        MIPS: asm-offset.c: Delete unused irq_cpustat_t struct offsets.
        MIPS: Alchemy: Merge PB1100/1500 support into DB1000 code.
        MIPS: Alchemy: merge PB1550 support into DB1550 code
        MIPS: Alchemy: Single kernel for DB1200/1300/1550
        MIPS: Optimize TLB refill for RI/XI configurations.
        MIPS: proc: Cleanup printing of ASEs.
        MIPS: Hardwire detection of DSP ASE Rev 2 for systems, as required.
        MIPS: Add detection of DSP ASE Revision 2.
        MIPS: Optimize pgd_init and pmd_init
        MIPS: perf: Add perf functionality for BMIPS5000
        MIPS: perf: Split the Kconfig option CONFIG_MIPS_MT_SMP
        MIPS: perf: Remove unnecessary #ifdef
        MIPS: perf: Add cpu feature bit for PCI (performance counter interrupt)
        MIPS: perf: Change the "mips_perf_event" table unsupported indicator.
        MIPS: Align swapper_pg_dir to 64K for better TLB Refill code.
        vmlinux.lds.h: Allow architectures to add sections to the front of .bss
        ...
      a5ef3f7d
    • Linus Torvalds's avatar
      Merge branch 'modules-next' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux · d25282d1
      Linus Torvalds authored
      Pull module signing support from Rusty Russell:
       "module signing is the highlight, but it's an all-over David Howells frenzy..."
      
      Hmm "Magrathea: Glacier signing key". Somebody has been reading too much HHGTTG.
      
      * 'modules-next' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux: (37 commits)
        X.509: Fix indefinite length element skip error handling
        X.509: Convert some printk calls to pr_devel
        asymmetric keys: fix printk format warning
        MODSIGN: Fix 32-bit overflow in X.509 certificate validity date checking
        MODSIGN: Make mrproper should remove generated files.
        MODSIGN: Use utf8 strings in signer's name in autogenerated X.509 certs
        MODSIGN: Use the same digest for the autogen key sig as for the module sig
        MODSIGN: Sign modules during the build process
        MODSIGN: Provide a script for generating a key ID from an X.509 cert
        MODSIGN: Implement module signature checking
        MODSIGN: Provide module signing public keys to the kernel
        MODSIGN: Automatically generate module signing keys if missing
        MODSIGN: Provide Kconfig options
        MODSIGN: Provide gitignore and make clean rules for extra files
        MODSIGN: Add FIPS policy
        module: signature checking hook
        X.509: Add a crypto key parser for binary (DER) X.509 certificates
        MPILIB: Provide a function to read raw data into an MPI
        X.509: Add an ASN.1 decoder
        X.509: Add simple ASN.1 grammar compiler
        ...
      d25282d1
    • Matt Fleming's avatar
      x86, boot: Explicitly include autoconf.h for hostprogs · b6eea87f
      Matt Fleming authored
      The hostprogs need access to the CONFIG_* symbols found in
      include/generated/autoconf.h.  But commit abbf1590 ("UAPI: Partition
      the header include path sets and add uapi/ header directories") replaced
      $(LINUXINCLUDE) with $(USERINCLUDE) which doesn't contain the necessary
      include paths.
      
      This has the undesirable effect of breaking the EFI boot stub because
      the #ifdef CONFIG_EFI_STUB code in arch/x86/boot/tools/build.c is
      never compiled.
      
      It should also be noted that because $(USERINCLUDE) isn't exported by
      the top-level Makefile it's actually empty in arch/x86/boot/Makefile.
      
      Cc: H. Peter Anvin <hpa@zytor.com>
      Cc: Ingo Molnar <mingo@kernel.org>
      Acked-by: default avatarDavid Howells <dhowells@redhat.com>
      Signed-off-by: default avatarMatt Fleming <matt.fleming@intel.com>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      b6eea87f
    • Ingo Molnar's avatar
      perf: Fix UAPI fallout · 7d380c8f
      Ingo Molnar authored
      The UAPI commits forgot to test tooling builds such as tools/perf/,
      and this fixes the fallout.
      
      Manual conversion.
      Signed-off-by: default avatarIngo Molnar <mingo@kernel.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      7d380c8f
    • Linus Torvalds's avatar
      Merge branch 'late-for-linus' of git://git.linaro.org/people/rmk/linux-arm · 3d6ee36d
      Linus Torvalds authored
      Pull ARM update from Russell King:
       "This is the final round of stuff for ARM, left until the end of the
        merge window to reduce the number of conflicts.  This set contains the
        ARM part of David Howells UAPI changes, and a fix to the ordering of
        'select' statements in ARM Kconfig files (see the appropriate commit
        for why this happened - thanks to Andrew Morton for pointing out the
        problem.)
      
        I've left this as long as I dare for this window to avoid conflicts,
        and I regenerated the config patch yesterday, posting it to our
        mailing list for review and testing.  I have several acks which
        include successful test reports for it.
      
        However, today I notice we've got new conflicts with previously unseen
        code...  though that conflict should be trivial (it's my changes vs a
        one liner.)"
      
      * 'late-for-linus' of git://git.linaro.org/people/rmk/linux-arm:
        ARM: config: make sure that platforms are ordered by option string
        ARM: config: sort select statements alphanumerically
        UAPI: (Scripted) Disintegrate arch/arm/include/asm
      
      Fix up fairly conflict in arch/arm/Kconfig (the select re-organization
      vs recent addition of GENERIC_KERNEL_EXECVE)
      3d6ee36d
  4. 13 Oct, 2012 26 commits