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  1. 04 Oct, 2006 7 commits
  2. 03 Oct, 2006 1 commit
  3. 02 Oct, 2006 1 commit
    • Arnd Bergmann's avatar
      [PATCH] rename the provided execve functions to kernel_execve · 3db03b4a
      Arnd Bergmann authored
      Some architectures provide an execve function that does not set errno, but
      instead returns the result code directly.  Rename these to kernel_execve to
      get the right semantics there.  Moreover, there is no reasone for any of these
      architectures to still provide __KERNEL_SYSCALLS__ or _syscallN macros, so
      remove these right away.
      
      [akpm@osdl.org: build fix]
      [bunk@stusta.de: build fix]
      Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
      Cc: Andi Kleen <ak@muc.de>
      Acked-by: default avatarPaul Mackerras <paulus@samba.org>
      Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
      Cc: Richard Henderson <rth@twiddle.net>
      Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
      Cc: Russell King <rmk@arm.linux.org.uk>
      Cc: Ian Molton <spyro@f2s.com>
      Cc: Mikael Starvik <starvik@axis.com>
      Cc: David Howells <dhowells@redhat.com>
      Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
      Cc: Hirokazu Takata <takata.hirokazu@renesas.com>
      Cc: Ralf Baechle <ralf@linux-mips.org>
      Cc: Kyle McMartin <kyle@mcmartin.ca>
      Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
      Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
      Cc: Paul Mundt <lethal@linux-sh.org>
      Cc: Kazumoto Kojima <kkojima@rr.iij4u.or.jp>
      Cc: Richard Curnow <rc@rc0.org.uk>
      Cc: William Lee Irwin III <wli@holomorphy.com>
      Cc: "David S. Miller" <davem@davemloft.net>
      Cc: Jeff Dike <jdike@addtoit.com>
      Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
      Cc: Miles Bader <uclinux-v850@lsi.nec.co.jp>
      Cc: Chris Zankel <chris@zankel.net>
      Cc: "Luck, Tony" <tony.luck@intel.com>
      Cc: Geert Uytterhoeven <geert@linux-m68k.org>
      Cc: Roman Zippel <zippel@linux-m68k.org>
      Signed-off-by: default avatarAdrian Bunk <bunk@stusta.de>
      Cc: Arnd Bergmann <arnd@arndb.de>
      Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
      3db03b4a
  4. 01 Oct, 2006 1 commit
    • Martin Schwidefsky's avatar
      [PATCH] Directed yield: cpu_relax variants for spinlocks and rw-locks · ef6edc97
      Martin Schwidefsky authored
      On systems running with virtual cpus there is optimization potential in
      regard to spinlocks and rw-locks.  If the virtual cpu that has taken a lock
      is known to a cpu that wants to acquire the same lock it is beneficial to
      yield the timeslice of the virtual cpu in favour of the cpu that has the
      lock (directed yield).
      
      With CONFIG_PREEMPT="n" this can be implemented by the architecture without
      common code changes.  Powerpc already does this.
      
      With CONFIG_PREEMPT="y" the lock loops are coded with _raw_spin_trylock,
      _raw_read_trylock and _raw_write_trylock in kernel/spinlock.c.  If the lock
      could not be taken cpu_relax is called.  A directed yield is not possible
      because cpu_relax doesn't know anything about the lock.  To be able to
      yield the lock in favour of the current lock holder variants of cpu_relax
      for spinlocks and rw-locks are needed.  The new _raw_spin_relax,
      _raw_read_relax and _raw_write_relax primitives differ from cpu_relax
      insofar that they have an argument: a pointer to the lock structure.
      Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Haavard Skinnemoen <hskinnemoen@atmel.com>
      Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
      ef6edc97
  5. 26 Sep, 2006 1 commit
    • Dave McCracken's avatar
      [PATCH] Standardize pxx_page macros · 46a82b2d
      Dave McCracken authored
      One of the changes necessary for shared page tables is to standardize the
      pxx_page macros.  pte_page and pmd_page have always returned the struct
      page associated with their entry, while pte_page_kernel and pmd_page_kernel
      have returned the kernel virtual address.  pud_page and pgd_page, on the
      other hand, return the kernel virtual address.
      
      Shared page tables needs pud_page and pgd_page to return the actual page
      structures.  There are very few actual users of these functions, so it is
      simple to standardize their usage.
      
      Since this is basic cleanup, I am submitting these changes as a standalone
      patch.  Per Hugh Dickins' comments about it, I am also changing the
      pxx_page_kernel macros to pxx_page_vaddr to clarify their meaning.
      Signed-off-by: default avatarDave McCracken <dmccr@us.ibm.com>
      Cc: Hugh Dickins <hugh@veritas.com>
      Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
      46a82b2d
  6. 19 Sep, 2006 1 commit
  7. 15 Jul, 2006 1 commit
    • Steven Rostedt's avatar
      [PATCH] remove set_wmb - arch removal · 52393ccc
      Steven Rostedt authored
      set_wmb should not be used in the kernel because it just confuses the
      code more and has no benefit.  Since it is not currently used in the
      kernel this patch removes it so that new code does not include it.
      
      All archs define set_wmb(var, value) to do { var = value; wmb(); }
      while(0) except ia64 and sparc which use a mb() instead.  But this is
      still moot since it is not used anyway.
      
      Hasn't been tested on any archs but x86 and x86_64 (and only compiled
      tested)
      Signed-off-by: default avatarSteven Rostedt <rostedt@goodmis.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
      52393ccc
  8. 02 Jul, 2006 1 commit
  9. 29 Jun, 2006 3 commits
    • Catherine Zhang's avatar
      [AF_UNIX]: Datagram getpeersec · 877ce7c1
      Catherine Zhang authored
      This patch implements an API whereby an application can determine the
      label of its peer's Unix datagram sockets via the auxiliary data mechanism of
      recvmsg.
      
      Patch purpose:
      
      This patch enables a security-aware application to retrieve the
      security context of the peer of a Unix datagram socket.  The application
      can then use this security context to determine the security context for
      processing on behalf of the peer who sent the packet.
      
      Patch design and implementation:
      
      The design and implementation is very similar to the UDP case for INET
      sockets.  Basically we build upon the existing Unix domain socket API for
      retrieving user credentials.  Linux offers the API for obtaining user
      credentials via ancillary messages (i.e., out of band/control messages
      that are bundled together with a normal message).  To retrieve the security
      context, the application first indicates to the kernel such desire by
      setting the SO_PASSSEC option via getsockopt.  Then the application
      retrieves the security context using the auxiliary data mechanism.
      
      An example server application for Unix datagram socket should look like this:
      
      toggle = 1;
      toggle_len = sizeof(toggle);
      
      setsockopt(sockfd, SOL_SOCKET, SO_PASSSEC, &toggle, &toggle_len);
      recvmsg(sockfd, &msg_hdr, 0);
      if (msg_hdr.msg_controllen > sizeof(struct cmsghdr)) {
          cmsg_hdr = CMSG_FIRSTHDR(&msg_hdr);
          if (cmsg_hdr->cmsg_len <= CMSG_LEN(sizeof(scontext)) &&
              cmsg_hdr->cmsg_level == SOL_SOCKET &&
              cmsg_hdr->cmsg_type == SCM_SECURITY) {
              memcpy(&scontext, CMSG_DATA(cmsg_hdr), sizeof(scontext));
          }
      }
      
      sock_setsockopt is enhanced with a new socket option SOCK_PASSSEC to allow
      a server socket to receive security context of the peer.
      
      Testing:
      
      We have tested the patch by setting up Unix datagram client and server
      applications.  We verified that the server can retrieve the security context
      using the auxiliary data mechanism of recvmsg.
      Signed-off-by: default avatarCatherine Zhang <cxzhang@watson.ibm.com>
      Acked-by: default avatarAcked-by: James Morris <jmorris@namei.org>
      Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
      877ce7c1
    • Ingo Molnar's avatar
      [PATCH] genirq: add ->retrigger() irq op to consolidate hw_irq_resend() · c0ad90a3
      Ingo Molnar authored
      Add ->retrigger() irq op to consolidate hw_irq_resend() implementations.
      (Most architectures had it defined to NOP anyway.)
      
      NOTE: ia64 needs testing. i386 and x86_64 tested.
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
      Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
      c0ad90a3
    • Ingo Molnar's avatar
      [PATCH] genirq: cleanup: turn ARCH_HAS_IRQ_PER_CPU into CONFIG_IRQ_PER_CPU · 0d7012a9
      Ingo Molnar authored
      Cleanup: change ARCH_HAS_IRQ_PER_CPU into a Kconfig method.
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
      Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
      0d7012a9
  10. 27 Jun, 2006 12 commits
  11. 25 Jun, 2006 1 commit
  12. 23 Jun, 2006 1 commit
  13. 18 Jun, 2006 1 commit
  14. 29 Apr, 2006 1 commit
  15. 26 Apr, 2006 1 commit
  16. 21 Apr, 2006 3 commits
  17. 11 Apr, 2006 1 commit
    • Yasunori Goto's avatar
      [PATCH] Configurable NODES_SHIFT · c80d79d7
      Yasunori Goto authored
      Current implementations define NODES_SHIFT in include/asm-xxx/numnodes.h for
      each arch.  Its definition is sometimes configurable.  Indeed, ia64 defines 5
      NODES_SHIFT values in the current git tree.  But it looks a bit messy.
      
      SGI-SN2(ia64) system requires 1024 nodes, and the number of nodes already has
      been changeable by config.  Suitable node's number may be changed in the
      future even if it is other architecture.  So, I wrote configurable node's
      number.
      
      This patch set defines just default value for each arch which needs multi
      nodes except ia64.  But, it is easy to change to configurable if necessary.
      
      On ia64 the number of nodes can be already configured in generic ia64 and SN2
      config.  But, NODES_SHIFT is defined for DIG64 and HP'S machine too.  So, I
      changed it so that all platforms can be configured via CONFIG_NODES_SHIFT.  It
      would be simpler.
      
      See also: http://marc.theaimsgroup.com/?l=linux-kernel&m=114358010523896&w=2Signed-off-by: default avatarYasunori Goto <y-goto@jp.fujitsu.com>
      Cc: Hirokazu Takata <takata@linux-m32r.org>
      Cc: "Luck, Tony" <tony.luck@intel.com>
      Cc: Andi Kleen <ak@muc.de>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
      Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
      Cc: Richard Henderson <rth@twiddle.net>
      Cc: Kyle McMartin <kyle@mcmartin.ca>
      Cc: Russell King <rmk@arm.linux.org.uk>
      Cc: Ralf Baechle <ralf@linux-mips.org>
      Cc: Jack Steiner <steiner@sgi.com>
      Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
      c80d79d7
  18. 30 Mar, 2006 2 commits