09 May, 2007
1 commit
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This patch moves the die notifier handling to common code. Previous
various architectures had exactly the same code for it. Note that the new
code is compiled unconditionally, this should be understood as an appel to
the other architecture maintainer to implement support for it aswell (aka
sprinkling a notify_die or two in the proper place)arm had a notifiy_die that did something totally different, I renamed it to
arm_notify_die as part of the patch and made it static to the file it's
declared and used at. avr32 used to pass slightly less information through
this interface and I brought it into line with the other architectures.[akpm@linux-foundation.org: build fix]
[akpm@linux-foundation.org: fix vmalloc_sync_all bustage]
[bryan.wu@analog.com: fix vmalloc_sync_all in nommu]
Signed-off-by: Christoph Hellwig
Cc:
Cc: Russell King
Signed-off-by: Bryan Wu
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
03 May, 2007
1 commit
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Add hooks to allow a paravirt implementation to track the lifetime of
an mm. Paravirtualization requires three hooks, but only two are
needed in common code. They are:arch_dup_mmap, which is called when a new mmap is created at fork
arch_exit_mmap, which is called when the last process reference to an
mm is dropped, which typically happens on exit and exec.The third hook is activate_mm, which is called from the arch-specific
activate_mm() macro/function, and so doesn't need stub versions for
other architectures. It's called when an mm is first used.Signed-off-by: Jeremy Fitzhardinge
Signed-off-by: Andi Kleen
Cc: linux-arch@vger.kernel.org
Cc: James Bottomley
Acked-by: Ingo Molnar
26 Apr, 2007
2 commits
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Now that network timestamps use ktime_t infrastructure, we can add a new
SOL_SOCKET sockopt SO_TIMESTAMPNS.This command is similar to SO_TIMESTAMP, but permits transmission of
a 'timespec struct' instead of a 'timeval struct' control message.
(nanosecond resolution instead of microsecond)Control message is labelled SCM_TIMESTAMPNS instead of SCM_TIMESTAMP
A socket cannot mix SO_TIMESTAMP and SO_TIMESTAMPNS : the two modes are
mutually exclusive.sock_recv_timestamp() became too big to be fully inlined so I added a
__sock_recv_timestamp() helper function.Signed-off-by: Eric Dumazet
CC: linux-arch@vger.kernel.org
Signed-off-by: David S. Miller -
Now network timestamps use ktime_t infrastructure, we can add a new
ioctl() SIOCGSTAMPNS command to get timestamps in 'struct timespec'.
User programs can thus access to nanosecond resolution.Signed-off-by: Eric Dumazet
CC: Stephen Hemminger
Signed-off-by: David S. Miller
12 Feb, 2007
2 commits
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The line discipline numbers N_* are currently defined for each architecture
individually, but (except for a seeming mistake) identically, in
asm/termios.h. There is no obvious reason why these numbers should be
architecture specific, nor any apparent relationship with the termios
structure. The total number of these, NR_LDISCS, is defined in linux/tty.h
anyway. So I propose the following patch which moves the definitions of
the individual line disciplines to linux/tty.h too.Three of these numbers (N_MASC, N_PROFIBUS_FDL, and N_SMSBLOCK) are unused
in the current kernel, but the patch still keeps the complete set in case
there are plans to use them yet.Signed-off-by: Tilman Schmidt
Cc:
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Various headers for CRIS architecture contain local_irq_disable() after
local_save_flags(). Turn it into local_irq_save().Signed-off-by: Jiri Kosina
Cc: Mikael StarvikSigned-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
10 Feb, 2007
1 commit
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On all targets that sucker boils down to memcpy_fromio(sbk->data, from, len).
The function name is highly misguiding (it _never_ does any checksums), the
last argument is just a noise and simply expanding the call to memcpy_fromio()
gives shorter and more readable source. For a lot of reasons it has almost
no remaining users, so it's better to just outright kill it.Signed-off-by: Al Viro
Signed-off-by: Linus Torvalds
14 Dec, 2006
1 commit
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Virtually index, physically tagged cache architectures can get away
without cache flushing when forking. This patch adds a new cache
flushing function flush_cache_dup_mm(struct mm_struct *) which for the
moment I've implemented to do the same thing on all architectures
except on MIPS where it's a no-op.Signed-off-by: Ralf Baechle
Signed-off-by: Linus Torvalds
09 Dec, 2006
1 commit
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In order to sort out our struct termios and add proper speed control we need
to separate the kernel and user termios structures. Glibc is fine but the
other libraries rely on the kernel exported struct termios and we need to
extend this without breaking the ABI/APITo do so we add a struct ktermios which is the kernel view of a termios
structure and overlaps the struct termios with extra fields on the end for
now. (That limitation will go away in later patches). Some platforms (eg
alpha) planned ahead and thus use the same struct for both, others did not.This just adds the structures but does not use them, it seems a sensible
splitting point for bisect if there are compile failures (not that I expect
them)Signed-off-by: Alan Cox
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
08 Dec, 2006
3 commits
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"extern inline" generates a warning with -Wmissing-prototypes and I'm
currently working on getting the kernel cleaned up for adding this to the
CFLAGS since it will help us to avoid a nasty class of runtime errors.If there are places that really need a forced inline, __always_inline would be
the correct solution.Signed-off-by: Adrian Bunk
Acked-by: Mikael Starvik
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Pass struct dev pointer to dma_cache_sync()
dma_cache_sync() is ill-designed in that it does not have a struct device
pointer argument which makes proper support for systems that consist of a
mix of coherent and non-coherent DMA devices hard. Change dma_cache_sync
to take a struct device pointer as first argument and fix all its callers
to pass it.Signed-off-by: Ralf Baechle
Cc: James Bottomley
Cc: "David S. Miller"
Cc: Greg KH
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
dma_is_consistent() is ill-designed in that it does not have a struct
device pointer argument which makes proper support for systems that consist
of a mix of coherent and non-coherent DMA devices hard. Change
dma_is_consistent to take a struct device pointer as first argument and fix
the sole caller to pass it.Signed-off-by: Ralf Baechle
Cc: James Bottomley
Cc: "David S. Miller"
Cc: Greg KH
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
03 Dec, 2006
1 commit
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* sanitize prototypes and annotate
* kill cast-as-lvalue abuses in csum_partial()
* usual ntohs-equals-shift for checksum purposesSigned-off-by: Al Viro
Signed-off-by: David S. Miller
02 Dec, 2006
1 commit
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Add arch specific dev_archdata to struct device
Adds an arch specific struct dev_arch to struct device. This enables
architecture to add specific fields to every device in the system, like
DMA operation pointers, NUMA node ID, firmware specific data, etc...Signed-off-by: Benjamin Herrenschmidt
Acked-by: Andi Kleen
Acked-By: David Howells
Signed-off-by: Greg Kroah-Hartman
02 Oct, 2006
1 commit
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The last in-kernel user of errno is gone, so we should remove the definition
and everything referring to it. This also removes the now-unused lib/execve.c
file that was introduced earlier.Also remove every trace of __KERNEL_SYSCALLS__ that still remained in the
kernel.Signed-off-by: Arnd Bergmann
Cc: Andi Kleen
Cc: Paul Mackerras
Cc: Benjamin Herrenschmidt
Cc: Richard Henderson
Cc: Ivan Kokshaysky
Cc: Russell King
Cc: Ian Molton
Cc: Mikael Starvik
Cc: David Howells
Cc: Yoshinori Sato
Cc: Hirokazu Takata
Cc: Ralf Baechle
Cc: Kyle McMartin
Cc: Heiko Carstens
Cc: Martin Schwidefsky
Cc: Paul Mundt
Cc: Kazumoto Kojima
Cc: Richard Curnow
Cc: William Lee Irwin III
Cc: "David S. Miller"
Cc: Jeff Dike
Cc: Paolo 'Blaisorblade' Giarrusso
Cc: Miles Bader
Cc: Chris Zankel
Cc: "Luck, Tony"
Cc: Geert Uytterhoeven
Cc: Roman Zippel
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
01 Oct, 2006
1 commit
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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: Martin Schwidefsky
Cc: Ingo Molnar
Cc: Paul Mackerras
Cc: Haavard Skinnemoen
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
26 Sep, 2006
1 commit
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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: Dave McCracken
Cc: Hugh Dickins
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
21 Sep, 2006
1 commit
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This fixes most of the issues with exported headers on CRIS, although
we do still need to deal with the asm/arch symlink.Signed-off-by: David Woodhouse
15 Jul, 2006
1 commit
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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: Steven Rostedt
Signed-off-by: Linus Torvalds
05 Jul, 2006
1 commit
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* git://git.infradead.org/hdrinstall-2.6:
Remove export of include/linux/isdn/tpam.h
Remove and from userspace export
Restrict headers exported to userspace for SPARC and SPARC64
Add empty Kbuild files for 'make headers_install' in remaining arches.
Add Kbuild file for Alpha 'make headers_install'
Add Kbuild file for SPARC 'make headers_install'
Add Kbuild file for IA64 'make headers_install'
Add Kbuild file for S390 'make headers_install'
Add Kbuild file for i386 'make headers_install'
Add Kbuild file for x86_64 'make headers_install'
Add Kbuild file for PowerPC 'make headers_install'
Add generic Kbuild files for 'make headers_install'
Basic implementation of 'make headers_check'
Basic implementation of 'make headers_install'
03 Jul, 2006
1 commit
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Use the new IRQF_ constants and remove the SA_INTERRUPT define
Signed-off-by: Thomas Gleixner
Cc: Ingo Molnar
Cc: "David S. Miller"
Cc: Benjamin Herrenschmidt
Cc: Mikael Starvik
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
01 Jul, 2006
1 commit
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Signed-off-by: Adrian Bunk
30 Jun, 2006
3 commits
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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_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: Catherine Zhang
Acked-by: Acked-by: James Morris
Signed-off-by: David S. Miller -
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: Ingo Molnar
Signed-off-by: Thomas Gleixner
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Cleanup: change ARCH_HAS_IRQ_PER_CPU into a Kconfig method.
Signed-off-by: Ingo Molnar
Signed-off-by: Thomas Gleixner
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
18 Jun, 2006
1 commit
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These include nothing more than the basic set of files listed in
asm-generic/Kbuild.asm. Any extra arch-specific files will need to be
added.Signed-off-by: David Woodhouse
29 Apr, 2006
1 commit
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These aren't needed by glibc or klibc, and they're broken in some cases
anyway. The uClibc folks are apparently switching over to stop using
them too (now that we agreed that they should be dropped, at least).Signed-off-by: David Woodhouse
26 Apr, 2006
1 commit
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Signed-off-by: David Woodhouse
11 Apr, 2006
2 commits
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__NR_sys_kexec_load should be __NR_kexec_load. Mainly affects users of the
_syscallN() macros, and glibc is already checking for __NR_kexec_load.Cc: Ulrich Drepper
Cc: "Eric W. Biederman"
Cc: Mikael Starvik
Cc: David Howells
Cc: Yoshinori Sato
Cc: Hirokazu Takata
Cc: Paul Mundt
Cc: Kazumoto Kojima
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Remove unused prepare_to_switch() macros.
Signed-off-by: Hirokazu Takata
Cc: Mikael Starvik
Cc: David Howells
Cc: Yoshinori Sato
Cc: Miles Bader
Cc: Chris Zankel
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
28 Mar, 2006
1 commit
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cris can use generic funcs.
Signed-off-by: KAMEZAWA Hiroyuki
Cc: Mikael Starvik
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
27 Mar, 2006
3 commits
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- remove __{,test_and_}{set,clear,change}_bit() and test_bit()
- remove generic_fls()
- remove generic_fls64()
- remove generic_hweight{32,16,8}()
- remove find_{next,first}{,_zero}_bit()
- remove ext2_{set,clear,test,find_first_zero,find_next_zero}_bit()
- remove minix_{test,set,test_and_clear,test,find_first_zero}_bit()
- remove sched_find_first_bit()Signed-off-by: Akinobu Mita
Acked-by: Mikael Starvik
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Bitmap functions for the minix filesystem and the ext2 filesystem except
ext2_set_bit_atomic() and ext2_clear_bit_atomic() do not require the atomic
guarantees.But these are defined by using atomic bit operations on several architectures.
(cris, frv, h8300, ia64, m32r, m68k, m68knommu, mips, s390, sh, sh64, sparc,
sparc64, v850, and xtensa)This patch switches to non atomic bit operation.
Signed-off-by: Akinobu Mita
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
remove unnecessary local_irq_restore() after cris_atomic_restore() in
test_and_set_bit().Signed-off-by: Akinobu Mita
Cc: Mikael Starvik
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
26 Mar, 2006
1 commit
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Implement the half-closed devices notifiation, by adding a new POLLRDHUP
(and its alias EPOLLRDHUP) bit to the existing poll/select sets. Since the
existing POLLHUP handling, that does not report correctly half-closed
devices, was feared to be changed, this implementation leaves the current
POLLHUP reporting unchanged and simply add a new bit that is set in the few
places where it makes sense. The same thing was discussed and conceptually
agreed quite some time ago:http://lkml.org/lkml/2003/7/12/116
Since this new event bit is added to the existing Linux poll infrastruture,
even the existing poll/select system calls will be able to use it. As far
as the existing POLLHUP handling, the patch leaves it as is. The
pollrdhup-2.6.16.rc5-0.10.diff defines the POLLRDHUP for all the existing
archs and sets the bit in the six relevant files. The other attached diff
is the simple change required to sys/epoll.h to add the EPOLLRDHUP
definition.There is "a stupid program" to test POLLRDHUP delivery here:
http://www.xmailserver.org/pollrdhup-test.c
It tests poll(2), but since the delivery is same epoll(2) will work equally.
Signed-off-by: Davide Libenzi
Cc: "David S. Miller"
Cc: Michael Kerrisk
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
24 Mar, 2006
1 commit
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include/linux/platform.h contained nothing that was actually used except
the default_idle() prototype, and is therefore removed by this patch.This patch does the following with the platform specific default_idle()
functions on different architectures:
- remove the unused function:
- parisc
- sparc64
- make the needlessly global function static:
- arm
- h8300
- m68k
- m68knommu
- s390
- v850
- x86_64
- add a prototype in asm/system.h:
- cris
- i386
- ia64Signed-off-by: Adrian Bunk
Acked-by: Patrick Mochel
Acked-by: Kyle McMartin
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
16 Feb, 2006
1 commit
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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: Michael S. Tsirkin
Cc: Roland Dreier
Cc: Badari Pulavarty
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
15 Feb, 2006
1 commit
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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: Michael S. Tsirkin
Acked-by: Hugh Dickins
Cc: Michael Kerrisk
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
04 Feb, 2006
1 commit
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"[PATCH] m68knommu: fix find_next_zero_bit in bitops.h" fixed a typo in
m68knommu implementation of find_next_zero_bit().grep(1) shows that cris, frv, h8300, v850 are also affected.
Signed-off-by: Alexey Dobriyan
Cc: Mikael Starvik
Cc: David Howells
Cc: Yoshinori Sato
Cc: Miles Bader
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
13 Jan, 2006
1 commit
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{get,put}_thread_info() were introduced in 2.5.4 and never
had been called by anything in the tree.Signed-off-by: Al Viro
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds