1. 01 5月, 2005 30 次提交
  2. 30 4月, 2005 4 次提交
    • R
      [PATCH] ARM: RTC: allow driver methods to return error · d5aa207e
      Russell King 提交于
      Allow RTC drivers to return error codes from their read_time
      or read_alarm methods.
      Signed-off-by: NRussell King <rmk@arm.linux.org.uk>
      d5aa207e
    • O
      [PATCH] ARM: 2649/1: Fix 'sparse -Wbitwise' warnings from MMIO macros · 05f9869b
      Olav Kongas 提交于
      Patch from Olav Kongas
      
      On ARM, the outX() and writeX() families of macros take the
      result of cpu_to_leYY(), which is of restricted type __leYY,
      and feed it to __raw_writeX(), which expect an argument of
      unrestricted type. This results in 'sparse -Wbitwise'
      warnings about incorrect types in assignments. Analogous
      type mismatch warnings are issued for inX() and readX()
      counterparts. The below patch resolves these warnings by
      adding forced typecasts.
      
      Signed-off-by: Olav Kongas
      Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
      05f9869b
    • N
      [PATCH] ARM: 2651/3: kernel helpers for NPTL support · 2d2669b6
      Nicolas Pitre 提交于
      Patch from Nicolas Pitre
      
      This patch entirely reworks the kernel assistance for NPTL on ARM.
      In particular this provides an efficient way to retrieve the TLS
      value and perform atomic operations without any instruction emulation
      nor special system call.  This even allows for pre ARMv6 binaries to
      be forward compatible with SMP systems without any penalty.
      The problematic and performance critical operations are performed
      through segment of kernel provided user code reachable from user space
      at a fixed address in kernel memory.  Those fixed entry points are
      within the vector page so we basically get it for free as no extra
      memory page is required and nothing else may be mapped at that
      location anyway.
      This is different from (but doesn't preclude) a full blown VDSO
      implementation, however a VDSO would prevent some assembly tricks with
      constants that allows for efficient branching to those code segments.
      And since those code segments only use a few cycles before returning to
      user code, the overhead of a VDSO far call would add a significant
      overhead to such minimalistic operations.
      The ARM_NR_set_tls syscall also changed number.  This is done for two
      reasons:
      1) this patch changes the way the TLS value was previously meant to be
         retrieved, therefore we ensure whatever library using the old way
         gets fixed (they only exist in private tree at the moment since the
         NPTL work is still progressing).
      2) the previous number was allocated in a range causing an undefined
         instruction trap on kernels not supporting that syscall and it was
         determined that allocating it in a range returning -ENOSYS would be
         much nicer for libraries trying to determine if the feature is
         present or not.
      
      Signed-off-by: Nicolas Pitre
      Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
      2d2669b6
    • L
      [PATCH] ARM: 2657/1: export ixp2000_pci_config_addr · 8443b165
      Lennert Buytenhek 提交于
      Patch from Lennert Buytenhek
      
      Export ixp2000_pci_config_addr, to be used by the IXDP2800 platform
      setup code to coordinate booting the master and slave NPU.
      
      Signed-off-by: Lennert Buytenhek
      Signed-off-by: Deepak Saxena
      Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
      8443b165
  3. 29 4月, 2005 4 次提交
  4. 28 4月, 2005 2 次提交