Add VR41xx SIU setup for serial console.
Signed-off-by: NYoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
Cc: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Add vr41xx_siu_early_setup() for serial console.
Signed-off-by: NYoichi Yuasa <yoichi_yuasa@tripeaks.co.jp>
Cc: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Russell King noticed this one: We have to avoid replacing B0 when we pick a
baud rate for a "hung up" port.  Ugly but the proper fix is in the tty layer
and means changing the tty<->serial interfaces so we will defer that for now.

[akpm@linux-foundation.org: fix uninitialised var]
Signed-off-by: NAlan Cox <alan@redhat.com>
Cc: Russell King <rmk@arm.linux.org.uk>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

We try and write the correct speed back but the serial midlayer already
mangles the speed on us and that means if we request B0 we report back B9600
when we should not.  For now we'll hack around this in the drivers and serial
code, pending a better long term solution.
Signed-off-by: NAlan Cox <alan@redhat.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

All were forward declared with static.

Fixes sparse warnings:
drivers/char/synclinkmp.c:1476:5: warning: symbol 'read_proc' was not declared. Should it be static?
drivers/char/synclinkmp.c:2027:5: warning: symbol 'bh_action' was not declared. Should it be static?
drivers/char/synclinkmp.c:2058:6: warning: symbol 'bh_handler' was not declared. Should it be static?
drivers/char/synclinkmp.c:2103:6: warning: symbol 'bh_receive' was not declared. Should it be static?
drivers/char/synclinkmp.c:2112:6: warning: symbol 'bh_transmit' was not declared. Should it be static?
drivers/char/synclinkmp.c:2124:6: warning: symbol 'bh_status' was not declared. Should it be static?
drivers/char/synclinkmp.c:2136:6: warning: symbol 'isr_timer' was not declared. Should it be static?
drivers/char/synclinkmp.c:2162:6: warning: symbol 'isr_rxint' was not declared. Should it be static?
drivers/char/synclinkmp.c:2221:6: warning: symbol 'isr_rxrdy' was not declared. Should it be static?
drivers/char/synclinkmp.c:2351:6: warning: symbol 'isr_txint' was not declared. Should it be static?
drivers/char/synclinkmp.c:2379:6: warning: symbol 'isr_txrdy' was not declared. Should it be static?
drivers/char/synclinkmp.c:2410:6: warning: symbol 'isr_rxdmaok' was not declared. Should it be static?
drivers/char/synclinkmp.c:2427:6: warning: symbol 'isr_rxdmaerror' was not declared. Should it be static?
drivers/char/synclinkmp.c:2445:6: warning: symbol 'isr_txdmaok' was not declared. Should it be static?
drivers/char/synclinkmp.c:2463:6: warning: symbol 'isr_txdmaerror' was not declared. Should it be static?
drivers/char/synclinkmp.c:2480:6: warning: symbol 'isr_io_pin' was not declared. Should it be static?
drivers/char/synclinkmp.c:3420:5: warning: symbol 'alloc_dma_bufs' was not declared. Should it be static?
drivers/char/synclinkmp.c:3494:5: warning: symbol 'alloc_buf_list' was not declared. Should it be static?
drivers/char/synclinkmp.c:3553:5: warning: symbol 'alloc_frame_bufs' was not declared. Should it be static?
drivers/char/synclinkmp.c:3570:6: warning: symbol 'free_dma_bufs' was not declared. Should it be static?
drivers/char/synclinkmp.c:3580:5: warning: symbol 'alloc_tmp_rx_buf' was not declared. Should it be static?
drivers/char/synclinkmp.c:3588:6: warning: symbol 'free_tmp_rx_buf' was not declared. Should it be static?
drivers/char/synclinkmp.c:3594:5: warning: symbol 'claim_resources' was not declared. Should it be static?
drivers/char/synclinkmp.c:3681:6: warning: symbol 'release_resources' was not declared. Should it be static?
drivers/char/synclinkmp.c:3737:6: warning: symbol 'add_device' was not declared. Should it be static?
drivers/char/synclinkmp.c:3860:6: warning: symbol 'device_init' was not declared. Should it be static?
drivers/char/synclinkmp.c:4054:6: warning: symbol 'enable_loopback' was not declared. Should it be static?
drivers/char/synclinkmp.c:4101:6: warning: symbol 'set_rate' was not declared. Should it be static?
drivers/char/synclinkmp.c:4147:6: warning: symbol 'rx_stop' was not declared. Should it be static?
drivers/char/synclinkmp.c:4168:6: warning: symbol 'rx_start' was not declared. Should it be static?
drivers/char/synclinkmp.c:4225:6: warning: symbol 'tx_start' was not declared. Should it be static?
drivers/char/synclinkmp.c:4295:6: warning: symbol 'tx_stop' was not declared. Should it be static?
drivers/char/synclinkmp.c:4322:6: warning: symbol 'tx_load_fifo' was not declared. Should it be static?
drivers/char/synclinkmp.c:4371:6: warning: symbol 'reset_port' was not declared. Should it be static?
drivers/char/synclinkmp.c:4395:6: warning: symbol 'reset_adapter' was not declared. Should it be static?
drivers/char/synclinkmp.c:4407:6: warning: symbol 'async_mode' was not declared. Should it be static?
drivers/char/synclinkmp.c:4546:6: warning: symbol 'hdlc_mode' was not declared. Should it be static?
drivers/char/synclinkmp.c:4748:6: warning: symbol 'tx_set_idle' was not declared. Should it be static?
drivers/char/synclinkmp.c:4768:6: warning: symbol 'get_signals' was not declared. Should it be static?
drivers/char/synclinkmp.c:4797:6: warning: symbol 'set_signals' was not declared. Should it be static?
drivers/char/synclinkmp.c:4826:6: warning: symbol 'rx_reset_buffers' was not declared. Should it be static?
drivers/char/synclinkmp.c:4837:6: warning: symbol 'rx_free_frame_buffers' was not declared. Should it be static?
drivers/char/synclinkmp.c:4865:5: warning: symbol 'rx_get_frame' was not declared. Should it be static?
drivers/char/synclinkmp.c:5040:6: warning: symbol 'tx_load_dma_buffer' was not declared. Should it be static?
drivers/char/synclinkmp.c:5080:5: warning: symbol 'register_test' was not declared. Should it be static?
drivers/char/synclinkmp.c:5119:5: warning: symbol 'irq_test' was not declared. Should it be static?
drivers/char/synclinkmp.c:5211:5: warning: symbol 'init_adapter' was not declared. Should it be static?
drivers/char/synclinkmp.c:5270:5: warning: symbol 'loopback_test' was not declared. Should it be static?
drivers/char/synclinkmp.c:5335:5: warning: symbol 'adapter_test' was not declared. Should it be static?
drivers/char/synclinkmp.c:5397:5: warning: symbol 'memory_test' was not declared. Should it be static?
drivers/char/synclinkmp.c:5449:6: warning: symbol 'load_pci_memory' was not declared. Should it be static?
drivers/char/synclinkmp.c:5468:6: warning: symbol 'trace_block' was not declared. Should it be static?
drivers/char/synclinkmp.c:5503:6: warning: symbol 'tx_timeout' was not declared. Should it be static?
drivers/char/synclinkmp.c:5530:6: warning: symbol 'status_timeout' was not declared. Should it be static?
drivers/char/synclinkmp.c:5581:15: warning: symbol 'read_reg' was not declared. Should it be static?
drivers/char/synclinkmp.c:5586:6: warning: symbol 'write_reg' was not declared. Should it be static?
drivers/char/synclinkmp.c:5592:5: warning: symbol 'read_reg16' was not declared. Should it be static?
drivers/char/synclinkmp.c:5598:6: warning: symbol 'write_reg16' was not declared. Should it be static?
drivers/char/synclinkmp.c:5604:15: warning: symbol 'read_status_reg' was not declared. Should it be static?
drivers/char/synclinkmp.c:5610:6: warning: symbol 'write_control_reg' was not declared. Should it be static?
Signed-off-by: NHarvey Harrison <harvey.harrison@gmail.com>
Cc: Paul Fulghum <paulkf@microgate.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Remove more TRUE/FALSE defines and uses
Remove == TRUE tests
Convert BOOLEAN to bool
Convert int to bool where appropriate
Signed-off-by: NJoe Perches <joe@perches.com>
Acked-by: NPaul Fulghum <paulkf@microgate.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Fix following warnings:
WARNING: drivers/serial/built-in.o(.data+0x5b8): Section mismatch in reference from the variable pci_serial_quirks to the function .devexit.text:pci_ite887x_exit()
WARNING: drivers/serial/built-in.o(.data+0x5e0): Section mismatch in reference from the variable pci_serial_quirks to the function .devexit.text:pci_plx9050_exit()
WARNING: drivers/serial/built-in.o(.data+0x608): Section mismatch in reference from the variable pci_serial_quirks to the function .devexit.text:pci_plx9050_exit()
WARNING: drivers/serial/built-in.o(.data+0x658): Section mismatch in reference from the variable pci_serial_quirks to the function .devexit.text:pci_plx9050_exit()
WARNING: drivers/serial/built-in.o(.data+0x680): Section mismatch in reference from the variable pci_serial_quirks to the function .devexit.text:pci_plx9050_exit()
WARNING: drivers/serial/built-in.o(.data+0x6a8): Section mismatch in reference from the variable pci_serial_quirks to the function .devexit.text:pci_plx9050_exit()
WARNING: drivers/serial/built-in.o(.data+0x6d0): Section mismatch in reference from the variable pci_serial_quirks to the function .devexit.text:sbs_exit()
WARNING: drivers/serial/built-in.o(.data+0x6f8): Section mismatch in reference from the variable pci_serial_quirks to the function .devexit.text:sbs_exit()
WARNING: drivers/serial/built-in.o(.data+0x720): Section mismatch in reference from the variable pci_serial_quirks to the function .devexit.text:sbs_exit()
WARNING: drivers/serial/built-in.o(.data+0x748): Section mismatch in reference from the variable pci_serial_quirks to the function .devexit.text:sbs_exit()

pci_serial_quirks contains a number of function pointers where the referenced
function is annotated __devexit.  This is OK so we annotate pci_serial_quirks
with __refdata to ignore the __devexit references
Signed-off-by: NSam Ravnborg <sam@ravnborg.org>
Cc: Russell King <rmk+kernel@arm.linux.org.uk>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

We're casting anyway, might as well cast to the correct sign.
Specific to i386 (ifdef __i386__)

fs/ncpfs/ncpsign_kernel.c:58:23: warning: incorrect type in initializer (different signedness)
fs/ncpfs/ncpsign_kernel.c:58:23:    expected unsigned int *data2
fs/ncpfs/ncpsign_kernel.c:58:23:    got int *<noident>
Signed-off-by: NHarvey Harrison <harvey.harrison@gmail.com>
Acked-by: NPetr Vandrovec <VANDROVE@vc.cvut.cz>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

In both cases, these inode variables arebeing used to test the
server's root inode against NULL.  Change them to s_inode.
fs/ncpfs/ioctl.c:391:18: warning: symbol 'inode' shadows an earlier one
fs/ncpfs/ioctl.c:264:28: originally declared here
fs/ncpfs/ioctl.c:441:17: warning: symbol 'inode' shadows an earlier one
fs/ncpfs/ioctl.c:264:28: originally declared here

In this case, we are about to return anyway, just reuse result.
fs/ncpfs/ioctl.c:521:8: warning: symbol 'result' shadows an earlier one
fs/ncpfs/ioctl.c:268:6: originally declared here
Signed-off-by: NHarvey Harrison <harvey.harrison@gmail.com>
Acked-by: NPetr Vandrovec <VANDROVE@vc.cvut.cz>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Removes some externs from C files, noticed from the sparse warnings:
fs/ncpfs/dir.c:90:26: warning: symbol 'ncp_root_dentry_operations' was not declared. Should it be static?
fs/ncpfs/symlink.c:107:5: warning: symbol 'ncp_symlink' was not declared. Should it be static?
fs/ncpfs/symlink.c:101:39: warning: symbol 'ncp_symlink_aops' was not declared. Should it be static?
Signed-off-by: NHarvey Harrison <harvey.harrison@gmail.com>
Acked-by: NPetr Vandrovec <VANDROVE@vc.cvut.cz>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Make some global functions and variables static.

And remove some useless declarations for local functions, since we just need
to move their definitions ahead.

[jdike@addtoit.com: checkpatch cleanups]
Signed-off-by: NWANG Cong <wangcong@zeuux.org>
Signed-off-by: NJeff Dike <jdike@addtoit.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Improve this code a bit: check sigaction's return value and remove a useless
fflush().
Acked-by: NJeff Dike <jdike@addtoit.com>
Signed-off-by: NWANG Cong <wangcong@zeuux.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Make several things static, because they no longer need to be global.
Acked-by: NJeff Dike <jdike@addtoit.com>
Signed-off-by: NWANG Cong <wangcong@zeuux.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Make the following three functions static, since they don't need to be global.

arch/um/drivers/mcast_kern.c::mcast_setup()
arch/um/drivers/mconsole_user.c::mconsole_reply_v0()
arch/um/drivers/port_user.c::port_pre_exec()
Acked-by: NJeff Dike <jdike@addtoit.com>
Signed-off-by: NWANG Cong <wangcong@zeuux.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

arch/um/drivers/chan_kern.c::chan_out_fd() is not used by anyone.  Remove it.
Acked-by: NJeff Dike <jdike@addtoit.com>
Signed-off-by: NWANG Cong <wangcong@zeuux.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

arch/um/drivers/chan_kern.c::open_chan() can become static.
Acked-by: NJeff Dike <jdike@addtoit.com>
Signed-off-by: NWANG Cong <wangcong@zeuux.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

 - lets ptrace_child become void
 - adds checking for the return value of change_sig
 - moves errors info into stderr instead of stdout.

Cc: Jeff Dike <jdike@addtoit.com>
Signed-off-by: NWANG Cong <wangcong@zeuux.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

__FUNCTION__ is gcc-specific, use __func__
Signed-off-by: NHarvey Harrison <harvey.harrison@gmail.com>
Cc: Jeff Dike <jdike@addtoit.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Make some small improvements for arch/um/kernel/um_arch.c.
Signed-off-by: NWANG Cong <xiyou.wangcong@gmail.com>
Acked-by: NJeff Dike <jdike@addtoit.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

add constfy to pgd_offset() for avoid following warnings.

  CC      mm/pagewalk.o
mm/pagewalk.c: In function 'walk_page_range':
mm/pagewalk.c:111: warning: passing argument 1 of 'pgd_offset' discards qualifiers from p\
ointer target type
Signed-off-by: NKOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Matt Mackall <mpm@selenic.com>
Cc: "Vegard Nossum" <vegard.nossum@gmail.com>
Cc: Mikael Starvik <starvik@axis.com>
Cc: Jesper Nilsson <jesper.nilsson@axis.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

show_mem() has no need to print the amount of free swap space manually because
show_free_areas() does this already and is called by the former.

The two outputs only differ in text formatting:

  printk("Free swap  = %lukB\n", ...);
  printk("Free swap:       %6ldkB\n", ...);
Signed-off-by: NJohannes Weiner <hannes@saeurebad.de>
Cc: Mikael Starvik <mikael.starvik@axis.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Just the modem bits this time
Signed-off-by: NAlan Cox <alan@redhat.com>
Cc: Mikael Starvik <mikael.starvik@axis.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

__FUNCTION__ is gcc-specific, use __func__
Signed-off-by: NHarvey Harrison <harvey.harrison@gmail.com>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Roman Zippel <zippel@linux-m68k.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

show_mem() has no need to print the amount of free swap space manually because
show_free_areas() does this already and is called by the former.

The two outputs only differ in text formatting:

  printk("Free swap  = %lukB\n", ...);
  printk("Free swap:       %6ldkB\n", ...);
Signed-off-by: NJohannes Weiner <hannes@saeurebad.de>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Fix things like this:

security/selinux/netnode.c: In function 'sel_netnode_find':
security/selinux/netnode.c:126: warning: 'idx' may be used uninitialized in this function
security/selinux/netnode.c: In function 'sel_netnode_sid':
security/selinux/netnode.c:225: warning: 'ret' may be used uninitialized in this function
security/selinux/netnode.c:168: warning: 'idx' may be used uninitialized in this function

due to code correctly not expecting BUG() to return.

For some reason this reduces the object code size for that particular file.

Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Richard Henderson <rth@twiddle.net>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

The functions time_before, time_before_eq, time_after, and time_after_eq are
more robust for comparing jiffies against other values.

So implement usage of the time_after() macro, defined in linux/jiffies.h,
which deals with wrapping correctly

[akpm@linux-foundation.org: fix warning]
Signed-off-by: NS.Caglar Onur <caglar@pardus.org.tr>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Signed-off-by: NHarvey Harrison <harvey.harrison@gmail.com>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

__FUNCTION__ is gcc-specific, use __func__

The change in pci-iommu,c should be safe as arena has not been assigned
when we get to this point.

Some were within #if 0 blocks, have changed them and left the blocks
as they appear to be debugging infrastructure.

A #define FN __FUNCTION__ was removed and occurances of FN were replaced
with __func__ as well.
Signed-off-by: NHarvey Harrison <harvey.harrison@gmail.com>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Cc: Richard Henderson <rth@twiddle.net>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

arch/alpha/kernel/module.c (module_frob_arch_sections): Handle kcalloc failure.
Signed-off-by: NJim Meyering <meyering@redhat.com>
Cc: Richard Henderson <rth@twiddle.net>
Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

With the introduction of per-process securebits, the capabilities-related
prctl callbacks were moved into cap_task_prctl().  Have smack use
cap_task_prctl() so that PR_SET_KEEPCAPS is defined.
Signed-off-by: NSerge E. Hallyn <serue@us.ibm.com>
Acked-by: NCasey Schaufler <casey@schaufler-ca.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

The functions smk_cipso_doi and smk_unlbl_ambient are not used outside
smackfs.c and should hence be static.
Signed-off-by: NCasey Schaufler <casey@schaufler-ca.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

With the introduction of per-process securebits, the capabilities-related
prctl callbacks were moved into cap_task_prctl().  Have root_plug use
cap_task_prctl() so that PR_SET_KEEPCAPS is defined.
Signed-off-by: NSerge E. Hallyn <serue@us.ibm.com>
Acked-by: NGreg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

security/smack/smack_lsm.c:1257:16: warning: Using plain integer as NULL pointer
Signed-off-by: NHarvey Harrison <harvey.harrison@gmail.com>
Acked-by: NCasey Schaufler <casey@schaufler-ca.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Filesystem capability support makes it possible to do away with (set)uid-0
based privilege and use capabilities instead.  That is, with filesystem
support for capabilities but without this present patch, it is (conceptually)
possible to manage a system with capabilities alone and never need to obtain
privilege via (set)uid-0.

Of course, conceptually isn't quite the same as currently possible since few
user applications, certainly not enough to run a viable system, are currently
prepared to leverage capabilities to exercise privilege.  Further, many
applications exist that may never get upgraded in this way, and the kernel
will continue to want to support their setuid-0 base privilege needs.

Where pure-capability applications evolve and replace setuid-0 binaries, it is
desirable that there be a mechanisms by which they can contain their
privilege.  In addition to leveraging the per-process bounding and inheritable
sets, this should include suppressing the privilege of the uid-0 superuser
from the process' tree of children.

The feature added by this patch can be leveraged to suppress the privilege
associated with (set)uid-0.  This suppression requires CAP_SETPCAP to
initiate, and only immediately affects the 'current' process (it is inherited
through fork()/exec()).  This reimplementation differs significantly from the
historical support for securebits which was system-wide, unwieldy and which
has ultimately withered to a dead relic in the source of the modern kernel.

With this patch applied a process, that is capable(CAP_SETPCAP), can now drop
all legacy privilege (through uid=0) for itself and all subsequently
fork()'d/exec()'d children with:

  prctl(PR_SET_SECUREBITS, 0x2f);

This patch represents a no-op unless CONFIG_SECURITY_FILE_CAPABILITIES is
enabled at configure time.

[akpm@linux-foundation.org: fix uninitialised var warning]
[serue@us.ibm.com: capabilities: use cap_task_prctl when !CONFIG_SECURITY]
Signed-off-by: NAndrew G. Morgan <morgan@kernel.org>
Acked-by: NSerge Hallyn <serue@us.ibm.com>
Reviewed-by: NJames Morris <jmorris@namei.org>
Cc: Stephen Smalley <sds@tycho.nsa.gov>
Cc: Paul Moore <paul.moore@hp.com>
Signed-off-by: NSerge E. Hallyn <serue@us.ibm.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Don't perform kobjsize operations on objects the kernel doesn't manage.

On Blackfin, drivers can get dma coherent memory by calling a function
dma_alloc_coherent(). We do this in nommu by configuring a chunk of uncached
memory at the top of memory.

Since we don't want the kernel to use the uncached memory, we lie to the
kernel, and tell it that it's max memory is between 0, and the start of the
uncached dma coherent section.

this all works well, until this memory gets exposed into userspace (with a
frame buffer), when you look at the process's maps, it shows the framebuf:

root:/proc> cat maps
[snip]
03f0ef00-03f34700 rw-p 00000000 1f:00 192        /dev/fb0
root:/proc>

This is outside the "normal" range for the kernel. When the kernel tries to
find the size of this object (when you run ps), it dies in nommu.c in
kobjsize.

BUG_ON(page->index >= MAX_ORDER);

since the page we are referring to is outside what the kernel thinks is it's
max valid memory.

root:~> while [ 1 ]; ps > /dev/null; done
kernel BUG at mm/nommu.c:119!
Kernel panic - not syncing: BUG!

We fixed this by adding a check to reject out of range object pointers as it
already does that for NULL pointers.
Signed-off-by: NMichael Hennerich <Michael.Hennerich@analog.com>
Signed-off-by: NRobin Getz <rgetz@blackfin.uclinux.org>
Acked-by: NDavid Howells <dhowells@redhat.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

We've found that it can take quite a bit of time (100's of usec) to get
through the zone loop in refresh_cpu_vm_stats().

Adding a cond_resched() to allow other threads to run in the non-preemptive
case.
Signed-off-by: NDimitri Sivanich <sivanich@sgi.com>
Acked-by: NChristoph Lameter <clameter@sgi.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

This hack, "base = MAX_NR_ZONES", at __GFP_THISNODE was used for old
zonliests.

Now, new zonelist[] have a list for __GFP_THISNODE and this hack is incorrect.
Should be removed.
Signed-off-by: NKAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Cc: Christoph Lameter <clameter@sgi.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Remove hand-coded get_order() from page_alloc.c.
Signed-off-by: NPavel Machek <pavel@suse.cz>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

In commit 4c4a2214, we moved the
memcontroller-related code from badness() to select_bad_process(), so the
parameter 'mem' in badness() is unused now.
Signed-off-by: NLi Zefan <lizf@cn.fujitsu.com>
Acked-by: NBalbir Singh <balbir@linux.vnet.ibm.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

This patch is to free memmaps which is allocated by bootmem.

Freeing usemap is not necessary.  The pages of usemap may be necessary for
other sections.

If removing section is last section on the node, its section is the final user
of usemap page.  (usemaps are allocated on its section by previous patch.) But
it shouldn't be freed too, because the section must be logical offline state
which all pages are isolated against page allocater.  If it is freed, page
alloctor may use it which will be removed physically soon.  It will be
disaster.  So, this patch keeps it as it is.
Signed-off-by: NYasunori Goto <y-goto@jp.fujitsu.com>
Cc: Badari Pulavarty <pbadari@us.ibm.com>
Cc: Yinghai Lu <yhlu.kernel@gmail.com>
Cc: Yasunori Goto <y-goto@jp.fujitsu.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>