1. 16 Feb, 2012 6 commits
    • Grant Likely's avatar
      irq_domain/powerpc: constify irq_domain_ops · 9f70b8eb
      Grant Likely authored
      
      
      Make all the irq_domain_ops structures in powerpc 'static const'
      Signed-off-by: default avatarGrant Likely <grant.likely@secretlab.ca>
      Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Milton Miller <miltonm@bga.com>
      Tested-by: default avatarOlof Johansson <olof@lixom.net>
      9f70b8eb
    • Grant Likely's avatar
      irq_domain: constify irq_domain_ops · a18dc81b
      Grant Likely authored
      
      
      Make irq_domain_ops pointer a constant to make it safer for multiple
      instances to share the same ops pointer and change the irq_domain code
      so that it does not modify the ops.
      
      v4: Fix mismatched type reference in powerpc code
      Signed-off-by: default avatarGrant Likely <grant.likely@secretlab.ca>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
      Cc: Milton Miller <miltonm@bga.com>
      Tested-by: default avatarOlof Johansson <olof@lixom.net>
      a18dc81b
    • Grant Likely's avatar
      irq_domain: Add support for base irq and hwirq in legacy mappings · 1bc04f2c
      Grant Likely authored
      
      
      Add support for a legacy mapping where irq = (hwirq - first_hwirq + first_irq)
      so that a controller driver can allocate a fixed range of irq_descs and use
      a simple calculation to translate back and forth between linux and hw irq
      numbers.  This is needed to use an irq_domain with many of the ARM interrupt
      controller drivers that manage their own irq_desc allocations.  Ultimately
      the goal is to migrate those drivers to use the linear revmap, but doing it
      this way allows each driver to be converted separately which makes the
      migration path easier.
      
      This patch generalizes the IRQ_DOMAIN_MAP_LEGACY method to use
      (first_irq-first_hwirq) as the offset between hwirq and linux irq number,
      and adds checks to make sure that the hwirq number does not exceed range
      assigned to the controller.
      Signed-off-by: default avatarGrant Likely <grant.likely@secretlab.ca>
      Cc: Rob Herring <rob.herring@calxeda.com>
      Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Milton Miller <miltonm@bga.com>
      Tested-by: default avatarOlof Johansson <olof@lixom.net>
      1bc04f2c
    • Grant Likely's avatar
      irq_domain: Replace irq_alloc_host() with revmap-specific initializers · a8db8cf0
      Grant Likely authored
      
      
      Each revmap type has different arguments for setting up the revmap.
      This patch splits up the generator functions so that each revmap type
      can do its own setup and the user doesn't need to keep track of how
      each revmap type handles the arguments.
      
      This patch also adds a host_data argument to the generators.  There are
      cases where the host_data pointer will be needed before the function returns.
      ie. the legacy map calls the .map callback for each irq before returning.
      
      v2: - Add void *host_data argument to irq_domain_add_*() functions
          - fixed failure to compile
          - Moved IRQ_DOMAIN_MAP_* defines into irqdomain.c
      Signed-off-by: default avatarGrant Likely <grant.likely@secretlab.ca>
      Cc: Rob Herring <rob.herring@calxeda.com>
      Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Milton Miller <miltonm@bga.com>
      Tested-by: default avatarOlof Johansson <olof@lixom.net>
      a8db8cf0
    • Grant Likely's avatar
      irq_domain: Move irq_domain code from powerpc to kernel/irq · cc79ca69
      Grant Likely authored
      
      
      This patch only moves the code.  It doesn't make any changes, and the
      code is still only compiled for powerpc.  Follow-on patches will generalize
      the code for other architectures.
      Signed-off-by: default avatarGrant Likely <grant.likely@secretlab.ca>
      Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Milton Miller <miltonm@bga.com>
      Tested-by: default avatarOlof Johansson <olof@lixom.net>
      cc79ca69
    • Grant Likely's avatar
      irq_domain/powerpc: Eliminate virq_is_host() · 6d9285b0
      Grant Likely authored
      
      
      There is only one user, and it is trivial to open-code.
      Signed-off-by: default avatarGrant Likely <grant.likely@secretlab.ca>
      Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Milton Miller <miltonm@bga.com>
      Tested-by: default avatarOlof Johansson <olof@lixom.net>
      6d9285b0
  2. 14 Feb, 2012 2 commits
    • Grant Likely's avatar
      irq_domain/powerpc: eliminate irq_map; use irq_alloc_desc() instead · 4bbdd45a
      Grant Likely authored
      
      
      This patch drops the powerpc-specific irq_map table and replaces it with
      directly using the irq_alloc_desc()/irq_free_desc() interfaces for allocating
      and freeing irq_desc structures.
      
      This patch is a preparation step for generalizing the powerpc-specific virq
      infrastructure to become irq_domains.
      
      As part of this change, the irq_big_lock is changed to a mutex from a raw
      spinlock.  There is no longer any need to use a spin lock since the irq_desc
      allocation code is now responsible for the critical section of finding
      an unused range of irq numbers.
      
      The radix lookup table is also changed to store the irq_data pointer instead
      of the irq_map entry since the irq_map is removed.  This should end up being
      functionally equivalent since only allocated irq_descs are ever added to the
      radix tree.
      
      v5: - Really don't ever allocate virq 0.  The previous version could still
            do it if hint == 0
          - Respect irq_virq_count setting for NOMAP.  Some NOMAP domains cannot
            use virq values above irq_virq_count.
          - Use numa_node_id() when allocating irq_descs.  Ideally the API should
            obtain that value from the caller, but that touches a lot of call sites
            so will be deferred to a follow-on patch.
          - Fix irq_find_mapping() to include irq numbers lower than
            NUM_ISA_INTERRUPTS.  With the switch to irq_alloc_desc*(), the lowest
            possible allocated irq is now returned by arch_probe_nr_irqs().
      v4: - Fix incorrect access to irq_data structure in debugfs code
          - Don't ever allocate virq 0
      Signed-off-by: default avatarGrant Likely <grant.likely@secretlab.ca>
      Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Milton Miller <miltonm@bga.com>
      Tested-by: default avatarOlof Johansson <olof@lixom.net>
      4bbdd45a
    • Grant Likely's avatar
      irq_domain/powerpc: Use common irq_domain structure instead of irq_host · bae1d8f1
      Grant Likely authored
      
      
      This patch drops the powerpc-specific irq_host structures and uses the common
      irq_domain strucutres defined in linux/irqdomain.h.  It also fixes all
      the users to use the new structure names.
      
      Renaming irq_host to irq_domain has been discussed for a long time, and this
      patch is a step in the process of generalizing the powerpc virq code to be
      usable by all architecture.
      
      An astute reader will notice that this patch actually removes the irq_host
      structure instead of renaming it.  This is because the irq_domain structure
      already exists in include/linux/irqdomain.h and has the needed data members.
      Signed-off-by: default avatarGrant Likely <grant.likely@secretlab.ca>
      Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Milton Miller <miltonm@bga.com>
      Tested-by: default avatarOlof Johansson <olof@lixom.net>
      bae1d8f1
  3. 25 Jan, 2012 2 commits
  4. 24 Jan, 2012 2 commits
  5. 18 Jan, 2012 3 commits
  6. 17 Jan, 2012 4 commits
    • Eric Paris's avatar
      audit: inline audit_syscall_entry to reduce burden on archs · b05d8447
      Eric Paris authored
      
      
      Every arch calls:
      
      if (unlikely(current->audit_context))
      	audit_syscall_entry()
      
      which requires knowledge about audit (the existance of audit_context) in
      the arch code.  Just do it all in static inline in audit.h so that arch's
      can remain blissfully ignorant.
      Signed-off-by: default avatarEric Paris <eparis@redhat.com>
      b05d8447
    • Eric Paris's avatar
      Audit: push audit success and retcode into arch ptrace.h · d7e7528b
      Eric Paris authored
      
      
      The audit system previously expected arches calling to audit_syscall_exit to
      supply as arguments if the syscall was a success and what the return code was.
      Audit also provides a helper AUDITSC_RESULT which was supposed to simplify things
      by converting from negative retcodes to an audit internal magic value stating
      success or failure.  This helper was wrong and could indicate that a valid
      pointer returned to userspace was a failed syscall.  The fix is to fix the
      layering foolishness.  We now pass audit_syscall_exit a struct pt_reg and it
      in turns calls back into arch code to collect the return value and to
      determine if the syscall was a success or failure.  We also define a generic
      is_syscall_success() macro which determines success/failure based on if the
      value is < -MAX_ERRNO.  This works for arches like x86 which do not use a
      separate mechanism to indicate syscall failure.
      
      We make both the is_syscall_success() and regs_return_value() static inlines
      instead of macros.  The reason is because the audit function must take a void*
      for the regs.  (uml calls theirs struct uml_pt_regs instead of just struct
      pt_regs so audit_syscall_exit can't take a struct pt_regs).  Since the audit
      function takes a void* we need to use static inlines to cast it back to the
      arch correct structure to dereference it.
      
      The other major change is that on some arches, like ia64, MIPS and ppc, we
      change regs_return_value() to give us the negative value on syscall failure.
      THE only other user of this macro, kretprobe_example.c, won't notice and it
      makes the value signed consistently for the audit functions across all archs.
      
      In arch/sh/kernel/ptrace_64.c I see that we were using regs[9] in the old
      audit code as the return value.  But the ptrace_64.h code defined the macro
      regs_return_value() as regs[3].  I have no idea which one is correct, but this
      patch now uses the regs_return_value() function, so it now uses regs[3].
      
      For powerpc we previously used regs->result but now use the
      regs_return_value() function which uses regs->gprs[3].  regs->gprs[3] is
      always positive so the regs_return_value(), much like ia64 makes it negative
      before calling the audit code when appropriate.
      Signed-off-by: default avatarEric Paris <eparis@redhat.com>
      Acked-by: H. Peter Anvin <hpa@zytor.com> [for x86 portion]
      Acked-by: Tony Luck <tony.luck@intel.com> [for ia64]
      Acked-by: Richard Weinberger <richard@nod.at> [for uml]
      Acked-by: David S. Miller <davem@davemloft.net> [for sparc]
      Acked-by: Ralf Baechle <ralf@linux-mips.org> [for mips]
      Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> [for ppc]
      d7e7528b
    • Julia Lawall's avatar
      arch/powerpc/sysdev/fsl_pci.c: add missing iounmap · 0cf572dc
      Julia Lawall authored
      Add missing iounmap in error handling code, in a case where the function
      already preforms iounmap on some other execution path.
      
      A simplified version of the semantic match that finds this problem is as
      follows: (http://coccinelle.lip6.fr/
      
      )
      
      // <smpl>
      @@
      expression e;
      statement S,S1;
      int ret;
      @@
      e = \(ioremap\|ioremap_nocache\)(...)
      ... when != iounmap(e)
      if (<+...e...+>) S
      ... when any
          when != iounmap(e)
      *if (...)
         { ... when != iounmap(e)
           return ...; }
      ... when any
      iounmap(e);
      // </smpl>
      Signed-off-by: default avatarJulia Lawall <Julia.Lawall@lip6.fr>
      Signed-off-by: default avatarKumar Gala <galak@kernel.crashing.org>
      0cf572dc
    • Michael Neuling's avatar
      powerpc: fix compile error with 85xx/p1022_ds.c · ba8438fb
      Michael Neuling authored
      
      
      Current linux-next compiled with mpc85xx_defconfig causes this:
       arch/powerpc/platforms/85xx/p1022_ds.c:341:14: error: 'udbg_progress' undeclared here (not in a function)
      
      Add include to fix this.
      Signed-off-by: default avatarMichael Neuling <mikey@neuling.org>
      Acked-by: default avatarTimur Tabi <timur@freescale.com>
      Signed-off-by: default avatarKumar Gala <galak@kernel.crashing.org>
      ba8438fb
  7. 14 Jan, 2012 1 commit
    • Stephen Warren's avatar
      Kbuild: Use dtc's -d (dependency) option · 7c431851
      Stephen Warren authored
      
      
      This hooks dtc into Kbuild's dependency system.
      
      Thus, for example, "make dtbs" will rebuild tegra-harmony.dtb if only
      tegra20.dtsi has changed yet tegra-harmony.dts has not. The previous
      lack of this feature recently caused me to have very confusing "git
      bisect" results.
      
      For ARM, it's obvious what to add to $(targets). I'm not familiar enough
      with other architectures to know what to add there. Powerpc appears to
      already add various .dtb files into $(targets), but the other archs may
      need something added to $(targets) to work.
      Signed-off-by: Stephen Warren's avatarStephen Warren <swarren@nvidia.com>
      Acked-by: default avatarShawn Guo <shawn.guo@linaro.org>
      [mmarek: Dropped arch/c6x part to avoid merging commits from the middle
      of the merge window]
      Signed-off-by: default avatarMichal Marek <mmarek@suse.cz>
      7c431851
  8. 13 Jan, 2012 4 commits
  9. 11 Jan, 2012 2 commits
  10. 06 Jan, 2012 4 commits
  11. 04 Jan, 2012 10 commits