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  1. 01 5月, 2005 30 次提交
  3. 30 4月, 2005 4 次提交
    • R
      [PATCH] ARM: RTC: allow driver methods to return error · d5aa207e
      由 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
      由 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
      由 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
      由 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
  5. 29 4月, 2005 4 次提交
  7. 28 4月, 2005 2 次提交