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  1. 20 3月, 2006 1 次提交
  3. 16 3月, 2006 1 次提交
  5. 13 3月, 2006 1 次提交
  7. 07 3月, 2006 1 次提交
  9. 23 2月, 2006 2 次提交
  11. 17 2月, 2006 1 次提交
  13. 16 2月, 2006 2 次提交
    • R
      [ARM] Fix SMP initialisation oops · 7bbb7940
      由 Russell King 提交于 
      A change to the SMP initialisation caused the following oops:

 CPU1: Booted secondary processor
 CPU1: D VIPT write-back cache
 CPU1: I cache: 32768 bytes, associativity 4, 32 byte lines, 256 sets
 CPU1: D cache: 32768 bytes, associativity 4, 32 byte lines, 256 sets
 <7>Calibrating delay loop... 83.14 BogoMIPS (lpj=415744)
 <1>Unable to handle kernel NULL pointer dereference at virtual address 0000001c
 ...
 PC is at enqueue_task+0x1c/0x64
 LR is at activate_task+0xcc/0xe4

SMP initialisation now requires cpu_possible_map to be initialised in
setup_arch().  Move this from smp_prepare_cpus() to smp_init_cpus()
and call it from our setup_arch() if CONFIG_SMP is enabled.
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
      7bbb7940
    • M
      [PATCH] add asm-generic/mman.h · 5f6164f3
      由 Michael S. Tsirkin 提交于 
      Make new MADV_REMOVE, MADV_DONTFORK, MADV_DOFORK consistent across all
arches.  The idea is to make it possible to use them portably even before
distros include them in libc headers.

Move common flags to asm-generic/mman.h
Signed-off-by: NMichael S. Tsirkin <mst@mellanox.co.il>
Cc: Roland Dreier <rolandd@cisco.com>
Cc: Badari Pulavarty <pbadari@us.ibm.com>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      5f6164f3
  15. 15 2月, 2006 1 次提交
    • M
      [PATCH] madvise MADV_DONTFORK/MADV_DOFORK · f8225661
      由 Michael S. Tsirkin 提交于 
      Currently, copy-on-write may change the physical address of a page even if the
user requested that the page is pinned in memory (either by mlock or by
get_user_pages).  This happens if the process forks meanwhile, and the parent
writes to that page.  As a result, the page is orphaned: in case of
get_user_pages, the application will never see any data hardware DMA's into
this page after the COW.  In case of mlock'd memory, the parent is not getting
the realtime/security benefits of mlock.

In particular, this affects the Infiniband modules which do DMA from and into
user pages all the time.

This patch adds madvise options to control whether memory range is inherited
across fork.  Useful e.g.  for when hardware is doing DMA from/into these
pages.  Could also be useful to an application wanting to speed up its forks
by cutting large areas out of consideration.
Signed-off-by: NMichael S. Tsirkin <mst@mellanox.co.il>
Acked-by: NHugh Dickins <hugh@veritas.com>
Cc: Michael Kerrisk <mtk-manpages@gmx.net>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
      f8225661
  17. 11 2月, 2006 1 次提交
  19. 09 2月, 2006 2 次提交
  21. 02 2月, 2006 2 次提交
  23. 26 1月, 2006 2 次提交
  25. 19 1月, 2006 1 次提交
  27. 18 1月, 2006 1 次提交
  29. 16 1月, 2006 1 次提交
    • R
      [ARM] Fix missing compiler.h include · ef0498a7
      由 Russell King 提交于 
      asm/mach/arch.h introduced a __deprecated, but didn't include compiler.h,
causing:

In file included from arch/arm/mach-at91rm9200/devices.c:13:
include/asm/mach/arch.h:23: warning: no semicolon at end of struct or union
include/asm/mach/arch.h:23: error: syntax error before 'phys_ram'
include/asm/mach/arch.h:34: error: syntax error before ':' token
include/asm/mach/arch.h:35: error: syntax error before ':' token
include/asm/mach/arch.h:36: error: syntax error before ':' token
include/asm/mach/arch.h:37: error: syntax error before ':' token
include/asm/mach/arch.h:45: error: syntax error before '}' token

Add the necessary include.
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
      ef0498a7
  31. 15 1月, 2006 7 次提交
    • N
      [ARM] 3262/4: allow ptraced syscalls to be overriden · 3f471126
      由 Nicolas Pitre 提交于 
      Patch from Nicolas Pitre

This is needed by strace to properly handle the tracing of some system
calls. It could be useful for other applications as well.

Based on an earlier patch from Daniel Jacobowitz.
Signed-off-by: NNicolas Pitre <nico@cam.org>
Signed-off-by: NDaniel Jacobowitz <dan@debian.org>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
      3f471126
    • N
      [ARM] 3110/5: old ABI compat: multi-ABI syscall entry support · dd35afc2
      由 Nicolas Pitre 提交于 
      Patch from Nicolas Pitre

This patch adds the required code to support both user space ABIs at
the same time. A second syscall table is created to include legacy ABI
syscalls that need an ABI compat wrapper.
Signed-off-by: NNicolas Pitre <nico@cam.org>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
      dd35afc2
    • N
      [ARM] 3108/2: old ABI compat: statfs64 and fstatfs64 · 713c4815
      由 Nicolas Pitre 提交于 
      Patch from Nicolas Pitre

struct statfs64 has extra padding with EABI growing its size from 84 to
88. This struct is now __attribute__((packed,aligned(4))) with a small
assembly wrapper to force the sz argument to 84 if it is 88 to avoid
copying the extra padding over user space memory unexpecting it.
Signed-off-by: NNicolas Pitre <nico@cam.org>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
      713c4815
    • N
      [ARM] 3106/2: ARM EABI: some syscall adjustments · c155fc95
      由 Nicolas Pitre 提交于 
      Patch from Nicolas Pitre

Fix a few syscalls for EABI requirements. They were sys_pread64 and
sys_pwrite64 where the last argument is now entirely pushed on stack,
but since commit 567bd980 they don't
require any fixup.  Remains only the stat64 structure. Non EABI kernels
are unaffected.

Signed-off-by: Nicolas Pitre
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
      c155fc95
    • N
      [ARM] 3105/4: ARM EABI: new syscall entry convention · 3f2829a3
      由 Nicolas Pitre 提交于 
      Patch from Nicolas Pitre

For a while we wanted to change the way syscalls were called on ARM.
Instead of encoding the syscall number in the swi instruction which
requires reading back the instruction from memory to extract that number
and polluting the data cache, it was decided that simply storing the
syscall number into r7 would be more efficient. Since this represents
an ABI change then making that change at the same time as EABI support
is the right thing to do.

It is now expected that EABI user space binaries put the syscall number
into r7 and use "swi 0" to call the kernel. Syscall register argument
are also expected to have "EABI arrangement" i.e. 64-bit arguments
should be put in a pair of registers from an even register number.

Example with long ftruncate64(unsigned int fd, loff_t length):

	legacy ABI:
	- put fd into r0
	- put length into r1-r2
	- use "swi #(0x900000 + 194)" to call the kernel

	new ARM EABI:
	- put fd into r0
	- put length into r2-r3 (skipping over r1)
	- put 194 into r7
	- use "swi 0" to call the kernel

Note that it is important to use 0 for the swi argument as backward
compatibility with legacy ABI user space relies on this.
The syscall macros in asm-arm/unistd.h were also updated to support
both ABIs and implement the right call method automatically.
Signed-off-by: NNicolas Pitre <nico@cam.org>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
      3f2829a3
    • N
      [ARM] 3102/1: ARM EABI: stack pointer must be 64-bit aligned after a CPU exception · 2dede2d8
      由 Nicolas Pitre 提交于 
      Patch from Nicolas Pitre

The ARM EABI says that the stack pointer has to be 64-bit aligned for
reasons already mentioned in patch #3101 when calling C functions.

We therefore must verify and adjust sp accordingly when taking an
exception from kernel mode since sp might not necessarily be 64-bit
aligned if the exception occurs in the middle of a kernel function.

If the exception occurs while in user mode then no sp fixup is needed as
long as sizeof(struct pt_regs) as well as any additional syscall data
stack space remain multiples of 8.
Signed-off-by: NNicolas Pitre <nico@cam.org>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
      2dede2d8
    • N
      [ARM] 3101/1: ARM EABI: slab memory must be 64-bit aligned · da2b1cd6
      由 Nicolas Pitre 提交于 
      Patch from Nicolas Pitre

Although ARM is still using 32-bit pointers, version 5 and later
versions of the ARM architecture introduced the ldrd and strd
instructions to move 64-bit data which must be 64-bit aligned in memory,
and the EABI includes new constraints on structure data alignment to
allow for the compiler to use those instructions. This means that any
slab allocation must start on a 64-bit boundary which is not equivalent
to BYTES_PER_WORD, especially on those architecture versions that
implements the ldrd/strd instructions.

Overriding the default alignment disables some slab debug features. If
those debug features are really needed then the kernel will have to be
compiled for version 4 of the ARM architecture.
Signed-off-by: NNicolas Pitre <nico@cam.org>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
      da2b1cd6
  33. 14 1月, 2006 4 次提交
  35. 13 1月, 2006 6 次提交
  37. 11 1月, 2006 3 次提交