1. 07 May, 2003 36 commits
    • Andrew Morton's avatar
      [PATCH] ext3 xattr handler for security modules · c5013b3f
      Andrew Morton authored
      From: Stephen Smalley <sds@epoch.ncsc.mil>
      
      This patch against 2.5.68 implements an xattr handler for ext3 to support the
      use of extended attributes by security modules for storing file security
      labels.  As per the earlier discussion of extended attributes for security
      modules, this handler uses a "security." prefix and allows for per-module
      attribute names.  Security checking for userspace access to these attributes
      can be performed by the security module using the LSM hooks in fs/xattr.c,
      and the security module is free to internally use the inode operations
      without restriction for managing its security labels.  Unlike the trusted
      namespace, these labels are used internally for access control purposes by
      the security modules, and controls over userspace access to them require
      finer granularity than capable() supports.
      c5013b3f
    • Andrew Morton's avatar
      [PATCH] Move security_d_instantiate hook calls · 3558ebfc
      Andrew Morton authored
      From: Stephen Smalley <sds@epoch.ncsc.mil>
      
      This patch moves the security_d_instantiate hook calls in d_instantiate and
      d_splice_alias after the inode has been attached to the dentry.  This
      change is necessary so that security modules can internally call the
      getxattr inode operation (which takes a dentry parameter) from this hook to
      obtain the inode security label.
      3558ebfc
    • Andrew Morton's avatar
      [PATCH] select() speedup · 57a54189
      Andrew Morton authored
      From: Christoph Hellwig <hch@infradead.org>
      
      Originally by David Mosberger, testing by Roger Luethi.  From the ia64 tree.
      
      Basically, it avoids going to memory all the time.  What this does is make
      life a lot easier for gcc, so it can actually do a decent amount of
      optimization.  The restructuring clearly is less important for out-of-order
      CPUs, but even there it gives some benefits.
      
      More specifically, the loop is now structured to operate one "unsigned long"
      at a time, rather than one bit at a time.  Of course, you still need to
      process all the bits, but most of the relevant state in the inner loop can be
      kept in registers.
      
      Roger Luethi measured the routine on a bunch of different machines (mostly
      x86, IIRC: P5, P6, Crusoe, Athlons) and performance improved there, too (and
      it should definitely improve performance on any RISC-like architecture).
      
      
      Roger's benchmarking results (vs number of fd's):
      
                                             File                   TCP
      Numbfer of fd's:                  10   250  500          10   250   500
      
      UP, Pentium MMX 233MHz original	 8.2 108.5 212.8	11.0 180.0 356.5
      UP, Pentium MMX 233MHz w/patch	 7.4  87.6 171.1	10.4 163.6 323.4
      
      MP, Pentium MMX 233MHz original	15.7 283.8 562.8	18.9 354.4 705.5
      MP, Pentium MMX 233MHz w/patch	14.6 255.6 506.5	17.8 332.8 664.1
      
      UP, Athlon 1394 MHz original	 1.3  13.4  26.1	 1.9  24.7  48.6
      UP, Athlon 1394 MHz w/patch	 1.2  11.0  21.5	 1.6  22.3  43.8
      
      MP, Athlon 1394 MHz original	 1.6  22.4  44.6	 1.9  30.9  60.5
      MP, Athlon 1394 MHz w/patch	 1.5  21.2  41.7	 1.9  30.2  59.6
      57a54189
    • Andrew Morton's avatar
      [PATCH] allow i8042 interrupt sharing · b43dc348
      Andrew Morton authored
      Ed Tomlinson has a machine on which some other device grabs IRQ12 first, and
      the 8042 doesn't work.  Enabling shared iRQs in the 8042 driver fixes it up.
      Alan has confirmed that this is OK.
      b43dc348
    • Andrew Morton's avatar
      [PATCH] reduced overheads in fget/fput · 6a414e64
      Andrew Morton authored
      From: Dipankar Sarma <dipankar@in.ibm.com>
      
      
      fget() shows up on profiles, especially on SMP.  Dipankar's patch
      special-cases the situation wherein there are no sharers of current->files.
      
      In this situation we know that no other process can close this file, so it
      is not necessary to increment the file's refcount.
      
      It's ugly as sin, but makes a substantial difference.
      
      The test is
      
      	dd if=/dev/zero of=foo bs=1 count=1M
      
      On 4CPU P3 xeon with 1MB L2 cache and 512MB ram:
      
      	kernel           sys time     std-dev
      	------------     --------     -------
      
      	UP - vanilla     2.104        0.028
      	UP - file        1.867        0.019
      
      	SMP - vanilla    2.976        0.023
      	SMP - file       2.719        0.026
      6a414e64
    • Andrew Morton's avatar
      [PATCH] slab: additional debug checks · 09f95761
      Andrew Morton authored
      From: Manfred Spraul <manfred@colorfullife.com>
      
      below is the promised patch for better slab debugging, against 2.5.68-mm4:
      
      Changes:
      
      - enable redzoning and last user accounting even for large objects, if
        that doesn't waste too much memory
      
      - document why FORCED_DEBUG doesn't enable redzoning&last user accounting
        for some caches.
      
      - check the validity of the bufctl chains in a slab in __free_blocks.
        This detects double-free error for the caches without redzoning.
      09f95761
    • Andrew Morton's avatar
      [PATCH] account for slab reclaim in try_to_free_pages() · f31fd780
      Andrew Morton authored
      try_to_free_pages() currently fails to notice that it successfully freed slab
      pages via shrink_slab().  So it can keep looping and eventually call
      out_of_memory(), even though there's a lot of memory now free.
      
      And even if it doesn't do that, it can free too much memory.
      
      The patch changes try_to_free_pages() so that it will notice freed slab pages
      and will return when enough memory has been freed via shrink_slab().
      
      Many options were considered, but must of them were unacceptably inaccurate,
      intrusive or sleazy.  I ended up putting the accounting into a stack-local
      structure which is pointed to by current->reclaim_state.
      
      One reason for this is that we can cleanly resurrect the current->local_pages
      pool by putting it into struct reclaim_state.
      
      (current->local_pages was removed because the per-cpu page pools in the page
      allocator largely duplicate its function.  But it is still possible for
      interrupt-time allocations to steal just-freed pages, so we might want to put
      it back some time.)
      f31fd780
    • Andrew Morton's avatar
      [PATCH] remove unnecessary PAE pgd set · 9a4c2568
      Andrew Morton authored
      From: Dave Hansen <haveblue@us.ibm.com>, Bill Irwin
      
      With PAE on, there are only 4 PGD entries.  The kernel ones never change,
      so there is no need to copy them when a vmalloc fault occurs.  This was
      this was causing problems with the split pmd patches, but it is still
      correct for mainline.
      
      Tested with and without PAE.  I ran it in a loop turning on and off 10 swap
      partitions, which is what excited the original bug.
      http://bugme.osdl.org/show_bug.cgi?id=640
      9a4c2568
    • Andrew Morton's avatar
      [PATCH] hold i_sem on swapfiles · e5be69be
      Andrew Morton authored
      If a swapfile is ftruncated while in use, subsequent swapout will scribble on
      the filesystem.
      
      This is a case of root-shoot-foot, but wrecking the fs is a fairly rude
      response.  And it's easy to fix: hold i_sem across the life of the swapon.
      e5be69be
    • Andrew Morton's avatar
      [PATCH] access_ok() race fix for 80386. · 7c0aceca
      Andrew Morton authored
      From: Manfred Spraul <manfred@colorfullife.com>
      
      Real 80386 cpus ignore the write protected bit in the page tables when
      running in supervisory mode.  Thus the write protected bit must be checked by
      software.  The current implementation does that check during access_ok().
      This can result in data corruptions, if kswapd starts a swap-out between the
      access_ok and the actual write operation.
      
      To fix this, the patch moves the check from access_ok() into
      __copy_to_user_ll(), and redirects all user space writes into
      __copy_to_user_ll().  The patch only affects kernels build for 80386 cpus.
      Additionally, the patch removes the dead prototypes for __put_user_{1,2,4,8}.
      
      Due to the uninlining of access_ok, the .text segment is now ~ 8 kB shorter.
      7c0aceca
    • Andrew Morton's avatar
      [PATCH] dvbdev fixes · 6a5cde56
      Andrew Morton authored
      From: Monchi Abbad <kernel@axion.demon.nl>
      
      I found a mistake in the dvbdev.c file when creating the dvb /devfs files,
      it created /dev/dvb/adapter0device0 instead of /dev/dvb/adapter0/device0.
      But here is a simple fix.
      6a5cde56
    • Andrew Morton's avatar
      [PATCH] switch most remaining drivers over to devfs_mk_bdev · 7ae286bc
      Andrew Morton authored
      From: Christoph Hellwig <hch@lst.de>
      
      This is a pretty huge patch, but splitting it doesn't make a lot
      of sense..
      
      (USB may still need work)
      7ae286bc
    • Andrew Morton's avatar
      [PATCH] remove partition_name() · 65faa449
      Andrew Morton authored
      From: Christoph Hellwig <hch@lst.de>
      
      partition_name() is a variant of __bdevname() that caches results and
      returns a pointrer to kmalloc()ed data instead of printing into a buffer.
      Due to it's caching it gets utterly confused when the name for a dev_t
      changes (can happen easily now with device mapper and probably in the
      future with dynamic dev_t users).
      
      It's only used by the raid code and most calls are through a wrapper,
      bdev_partition_name() which takes a struct block_device * that maybe be
      NULL.
      
      The patch below changes the bdev_partition_name() to call bdevname() if
      possible and the other calls where we really have nothing more than a dev_t
      to __bdevname.
      
      Btw, it would be nice if someone who knows the md code a bit better than me
      could remove bdev_partition_name() in favour of direct calls to bdevname()
      where possible - that would also get rid of the returns pointer to string
      on stack issue that this patch can't fix yet.
      65faa449
    • Andrew Morton's avatar
      [PATCH] devfs: API changes · bd1f184d
      Andrew Morton authored
      From: Christoph Hellwig <hch@lst.de>
      
      Some people may already have noticed that I've been revamping the devfs API
      recently.  The worst offender still left is devfs_register, it's prototype
      is:
      
      	 devfs_handle_t devfs_register(devfs_handle_t dir,
      		const char *name, unsigned int flags,
      		unsigned int major, unsigned int minor,
      		umode_t mode, void *ops, void *info)
      
      Of these:
      
       - dir and flags are always zero
       - the return value is never used
       - info is only used in one driver which doesn't even need it for
         operation
       - umode_t always describes a character device
       - name very often comes from a stack buffer we sprintf'ed into
      
      so obviously we really want a much simpler API instead.  My first draft for
      this was:
      
      	int devfs_mk_cdev(dev_t dev, umode_t mode,
      		struct file_operations *fops, void *info,
      		const char *fmt, ...)
      
      this removes the unused argumens, switches to a proper dev_t for the device
      number and allows to directly use a printf-like expression as name, getting
      rid of the temporary buffers.
      
      Now Al has reappeared and put the first steps of his CIDR for charater device
      on public ftp and we'll soon have a similar lookup object + fops mechanism in
      generic code as we already habe for blockdevices, i.e.  the devfs code to
      assign fops from an entry will become superflous as generic code already does
      it.  That means the fops and info arguments are obsolete before they were
      introduced, so I'd like to propose the following API instead:
      
      	int devfs_mk_cdev(dev_t dev, umode_t mode, const char *fmt, ...)
      
      which is much nicer anyway.  The educated reader will notice that this is
      exactly the same prototype devfs_mk_bdev has so I'll probably get suggestions
      to merge those two into some kind of devfs_mk_node soon.  Personally I don't
      like that as character and blockdevices are two really separate entinities
      and I'll like to keep them as separate as possible.
      
      Example patch that introduces the API and converts drivers/input attached.
      
      Every driver which calls devfs_mk_cdev (about 50) needs conversion.  Note
      that the transition can happen in pieces - devfs_register continues to work
      after this patch, it's just the plan to get rid of it in the end.
      bd1f184d
    • Andrew Morton's avatar
      [PATCH] Don't use devfs names in disk_name() · 2e493e2a
      Andrew Morton authored
      From: Christoph Hellwig <hch@lst.de>
      
      disk_name() (and hence bdevname()) are now returning devfs-style device names
      when devfs is enabled.
      
      This is nice, but these names are very long, and they overflow the 32-char
      buffers which these functions use.
      
      The choices are:
      
      a) Use a bigger buffer (increase BDEVNAME_SIZE).
      
         This might be practical.  But how big?
      
      b) return the name in kmalloced memory, make caller free it up.   Yuk.
      
      c) Add a print_bdevname() thing and intersperse that amongst the printk's.
         This would work.
      
      d) Just print the non-devfs device name.   That's what this patch does.
      2e493e2a
    • Andrew Morton's avatar
      [PATCH] keyboard.c Fix CONFIG_MAGIC_SYSRQ+PrintScreen · 741698b7
      Andrew Morton authored
      From: Chris Heath <chris@heathens.co.nz>
      
      This patch fixes the PrintScreen key when CONFIG_MAGIC_SYSRQ is enabled.  It
      allows you to use that key normally when Alt is not being pressed.  Patch is
      against kernel 2.5.68.
      741698b7
    • Andrew Morton's avatar
      [PATCH] irqreturn_t for drivers/net/pcmcia · 6d9d6796
      Andrew Morton authored
      From: Zwane Mwaikambo <zwane@linuxpower.ca>
      
      update pcmcia drivers for new IRQ API
      6d9d6796
    • Andrew Morton's avatar
      [PATCH] s/UPDATE_ATIME/update_atime/ cleanup · df37f627
      Andrew Morton authored
      From:  Stewart Smith <stewartsmith@mac.com>
      
      Remove the UPDATE_ATIME() macro, use update_atime() directly.
      df37f627
    • Andrew Morton's avatar
      [PATCH] sysrq-S, sysrq-U cleanups · b7bd1dee
      Andrew Morton authored
      From: Christoph Hellwig <hch@lst.de>
      
      Change sysrq sync/remount from a magic bdflush hook to proper pdflush
      operations.  The sync operation reuses most of the regular sys_sync path now
      instead of implementing it's own superblock walking and (broken) local disk
      detection, the remount implementation has been moved to super.c, cleaned up
      and updated for the last two years locking changes.  It also shares some code
      with the regular remount path now.
      b7bd1dee
    • Andrew Morton's avatar
      [PATCH] slab: initialisation cleanup and oops fix · 862fb282
      Andrew Morton authored
      From: Manfred Spraul <manfred@colorfullife.com>
      
      attached is the promised cleanup/bugfix patch for the slab bootstrap:
      
      - kmem_cache_init & kmem_cache_sizes_init merged into one function,
        called after mem_init().  It's impossible to bring slab to an operational
        state without working gfp, thus the early partial initialization is not
        necessary.
      
      - g_cpucache_up set to FULL at the end of kmem_cache_init instead of the
        module init call.  This is a bugfix: slab was completely initialized,
        just the update of the state was missing.
      
      - some documentation for the bootstrap added.
      
      The minimal fix for the bug is a two-liner: move g_cpucache_up=FULL from
      cpucache_init to kmem_cache_sizes_init, but I want to get rid of
      kmem_cache_sizes_init, too.
      862fb282
    • Andrew Morton's avatar
      [PATCH] drm timer initialisation fix · c06d6406
      Andrew Morton authored
      The timer is being initialised too late (in ->open()).  If modprobe fails we
      get an uninitialised timer warning.
      c06d6406
    • Andrew Morton's avatar
      [PATCH] mwave build fix · 0a5b59fd
      Andrew Morton authored
      From: Michael Buesch <fsdeveloper@yahoo.de> and Paul Schroeder.
      
      mwavedd.h needs <linux/wait.h> and smapi.h
      0a5b59fd
    • Andrew Morton's avatar
      [PATCH] misc fixes · 5f4197af
      Andrew Morton authored
      - ifdef fix in kmap_types.h (Oleg Drokin)
      
      - remove redundant ext3 inclusions (Burton Windle)
      
      - Fix misidentified warning printk in vmalloc.c
      
      - radeon_cp printk warning fix (Randy Dunlap)
      
      - Update minimum binutils version for the ".incbin" thing in vsyscall.S
      
      - update raw driver to recent module API.
      
      - update my email address
      5f4197af
    • Andrew Morton's avatar
      [PATCH] fix OSS opl3sa2 compilation · 4e3f87f6
      Andrew Morton authored
      From: Zwane Mwaikambo <zwane@linuxpower.ca>
      
      There was a 2.4 merge from Alan Cox, but a few #ifdef's got shuffled around
      in the process, resulting in a broken build for !CONFIG_PM
      4e3f87f6
    • Andrew Morton's avatar
      [PATCH] cpia driver __exit fix · 30b85a5c
      Andrew Morton authored
      From: Andi Kleen <ak@muc.de>
      
      This driver was bogusly relying on the dropping of the __exit section at link
      time.  cpia_exit() is calling proc_cpia_destroy(), which doesn't even exist
      if !CONFIG_MODULE.
      30b85a5c
    • Andrew Morton's avatar
      [PATCH] Fix .altinstructions linking failures · 00b31e9a
      Andrew Morton authored
      From: Andi Kleen <ak@muc.de>
      
      Some configs didn't link anymore because they got references from
      .altinstructions to __exit functions.  Fixing it at the linker level is not
      easily possible.  This patch just discards .text.exit at runtime instead of
      link time to avoid this.
      
      It will also fix a related problem with .eh_frame in modern gcc (so far only
      observed on x86-64, but could happen on i386 too)
      00b31e9a
    • Andrew Morton's avatar
      [PATCH] generic subarchitecture for ia32 · 441d6fd9
      Andrew Morton authored
      From: Andi Kleen <ak@muc.de>
      
      This patch adds an generic x86 subarchitecture. It is intended to provide
      an dynamic interface for APIC drivers. There are already three subarchitectures
      (bigsmp, summit, default) that only differ in how they drive the local APIC.
      A fourth - Unisys ES7000 - is scheduled to be merged soon.
      
      The subarchitecture concept separated this nicely, but it has the big
      drawback that they are compile time options. A Linux vendor cannot
      ship own binary kernel rpms for all of these machines. Runtime probing
      is needed instead.
      
      This patch adds a new "generic" subarchitecture that just acts as a
      dynamic switching layer for APIC drivers. It only tries to virtualize
      the APICs, no attempt is made to cover further incompatiblities.
      This means machines like the Visual Workstation, pc9800 or
      Voyager are not covered; but these are unlikely to be supported by
      binary distributions anyways.
      
      The generic arch reuses the existing interface in mach_ipi / mach_mpparse.h /
      mach_apic.h and just pulls it using some macros into an "struct genapic"
      object. The main APIC code does not recognize it, it is all hidden
      in the mach-generic include files.
      
      Auto detection of APIC types is supported in the usual way used by
      existing ports like Summit - checking ACPI or mptables for specific
      signatures - or it can be specified by the user using a new "apic="
      boot option. I also moved the DMI scan to before the generic
      subarchitecture probe, so DMI could be used in future too to probe
      specific machines.
      
      Some minor hacks were needed to avoid circular declaration of a few
      symbols, but overall it's fairly clean.
      
      The patch has been tested on a Summit machine, an generic 4 virtual CPUs
      Xeon and on an ES7000.
      441d6fd9
    • Linus Torvalds's avatar
      Support a "checking" mode for kernel builds, that runs a · 8c2b313a
      Linus Torvalds authored
      user-supplied source checker on all C files before compiling
      them.
      
      I'll release the actual checker once I've cleaned it up a
      bit more (yay, all the copyright paperwork completed!)
      8c2b313a
    • Linus Torvalds's avatar
    • Linus Torvalds's avatar
      Use "__attribute__" consistently. · 3ee965cc
      Linus Torvalds authored
      3ee965cc
    • Linus Torvalds's avatar
      Avoid using undefined preprocessor symbols: check CONFIG_MK7 with · e6a3e9a3
      Linus Torvalds authored
      "defined()" rather than using it as a value.
      e6a3e9a3
    • Linus Torvalds's avatar
      Make lib/inflate.c look remotely like ANSI C, so that it can be · 0eec8ef1
      Linus Torvalds authored
      properly checked with the rest of the kernel.
      0eec8ef1
    • Linus Torvalds's avatar
      Merge bk://kernel.bkbits.net/gregkh/linux/linus-2.5 · 50441791
      Linus Torvalds authored
      into penguin.transmeta.com:/home/torvalds/v2.5/linux
      50441791
    • Greg Kroah-Hartman's avatar
      Merge kroah.com:/home/greg/linux/BK/bleed-2.5 · 66731c77
      Greg Kroah-Hartman authored
      into kroah.com:/home/greg/linux/BK/gregkh-2.5
      66731c77
    • Linus Torvalds's avatar
      Merge bk://kernel.bkbits.net/davem/net-2.5 · 6bd4301a
      Linus Torvalds authored
      into penguin.transmeta.com:/home/torvalds/v2.5/linux
      6bd4301a
    • Linus Torvalds's avatar
      Whee. Fix ancient mailing address. · 7c97c222
      Linus Torvalds authored
      7c97c222
  2. 06 May, 2003 4 commits