linux-stable.git/arch/c6x/kernel, branch linux-4.8.y

dma-mapping: use unsigned long for dma_attrs

2016-08-04T12:50:07+00:00

The dma-mapping core and the implementations do not change the DMA
attributes passed by pointer.  Thus the pointer can point to const data.
However the attributes do not have to be a bitfield.  Instead unsigned
long will do fine:

1. This is just simpler.  Both in terms of reading the code and setting
   attributes.  Instead of initializing local attributes on the stack
   and passing pointer to it to dma_set_attr(), just set the bits.

2. It brings safeness and checking for const correctness because the
   attributes are passed by value.

Semantic patches for this change (at least most of them):

    virtual patch
    virtual context

    @r@
    identifier f, attrs;

    @@
    f(...,
    - struct dma_attrs *attrs
    + unsigned long attrs
    , ...)
    {
    ...
    }

    @@
    identifier r.f;
    @@
    f(...,
    - NULL
    + 0
     )

and

    // Options: --all-includes
    virtual patch
    virtual context

    @r@
    identifier f, attrs;
    type t;

    @@
    t f(..., struct dma_attrs *attrs);

    @@
    identifier r.f;
    @@
    f(...,
    - NULL
    + 0
     )

Link: http://lkml.kernel.org/r/1468399300-5399-2-git-send-email-k.kozlowski@samsung.com
Signed-off-by: Krzysztof Kozlowski 
Acked-by: Vineet Gupta 
Acked-by: Robin Murphy 
Acked-by: Hans-Christian Noren Egtvedt 
Acked-by: Mark Salter  [c6x]
Acked-by: Jesper Nilsson  [cris]
Acked-by: Daniel Vetter  [drm]
Reviewed-by: Bart Van Assche 
Acked-by: Joerg Roedel  [iommu]
Acked-by: Fabien Dessenne  [bdisp]
Reviewed-by: Marek Szyprowski  [vb2-core]
Acked-by: David Vrabel  [xen]
Acked-by: Konrad Rzeszutek Wilk  [xen swiotlb]
Acked-by: Joerg Roedel  [iommu]
Acked-by: Richard Kuo  [hexagon]
Acked-by: Geert Uytterhoeven  [m68k]
Acked-by: Gerald Schaefer  [s390]
Acked-by: Bjorn Andersson 
Acked-by: Hans-Christian Noren Egtvedt  [avr32]
Acked-by: Vineet Gupta  [arc]
Acked-by: Robin Murphy  [arm64 and dma-iommu]
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

exit_thread: remove empty bodies

2016-05-21T00:58:30+00:00

Define HAVE_EXIT_THREAD for archs which want to do something in
exit_thread. For others, let's define exit_thread as an empty inline.

This is a cleanup before we change the prototype of exit_thread to
accept a task parameter.

[akpm@linux-foundation.org: fix mips]
Signed-off-by: Jiri Slaby 
Cc: "David S. Miller" 
Cc: "H. Peter Anvin" 
Cc: "James E.J. Bottomley" 
Cc: Aurelien Jacquiot 
Cc: Benjamin Herrenschmidt 
Cc: Catalin Marinas 
Cc: Chen Liqin 
Cc: Chris Metcalf 
Cc: Chris Zankel 
Cc: David Howells 
Cc: Fenghua Yu 
Cc: Geert Uytterhoeven 
Cc: Guan Xuetao 
Cc: Haavard Skinnemoen 
Cc: Hans-Christian Egtvedt 
Cc: Heiko Carstens 
Cc: Helge Deller 
Cc: Ingo Molnar 
Cc: Ivan Kokshaysky 
Cc: James Hogan 
Cc: Jeff Dike 
Cc: Jesper Nilsson 
Cc: Jiri Slaby 
Cc: Jonas Bonn 
Cc: Koichi Yasutake 
Cc: Lennox Wu 
Cc: Ley Foon Tan 
Cc: Mark Salter 
Cc: Martin Schwidefsky 
Cc: Matt Turner 
Cc: Max Filippov 
Cc: Michael Ellerman 
Cc: Michal Simek 
Cc: Mikael Starvik 
Cc: Paul Mackerras 
Cc: Peter Zijlstra 
Cc: Ralf Baechle 
Cc: Rich Felker 
Cc: Richard Henderson 
Cc: Richard Kuo 
Cc: Richard Weinberger 
Cc: Russell King 
Cc: Steven Miao 
Cc: Thomas Gleixner 
Cc: Tony Luck 
Cc: Vineet Gupta 
Cc: Will Deacon 
Cc: Yoshinori Sato 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

arch, ftrace: for KASAN put hard/soft IRQ entries into separate sections

2016-03-25T23:37:42+00:00

KASAN needs to know whether the allocation happens in an IRQ handler.
This lets us strip everything below the IRQ entry point to reduce the
number of unique stack traces needed to be stored.

Move the definition of __irq_entry to  so that the
users don't need to pull in .  Also introduce the
__softirq_entry macro which is similar to __irq_entry, but puts the
corresponding functions to the .softirqentry.text section.

Signed-off-by: Alexander Potapenko 
Acked-by: Steven Rostedt 
Cc: Christoph Lameter 
Cc: Pekka Enberg 
Cc: David Rientjes 
Cc: Joonsoo Kim 
Cc: Andrey Konovalov 
Cc: Dmitry Vyukov 
Cc: Andrey Ryabinin 
Cc: Konstantin Serebryany 
Cc: Dmitry Chernenkov 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

locking/lockdep: Eliminate lockdep_init()

2016-02-09T11:03:25+00:00

Lockdep is initialized at compile time now.  Get rid of lockdep_init().

Signed-off-by: Andrey Ryabinin 
Signed-off-by: Andrew Morton 
Cc: Linus Torvalds 
Cc: Mike Krinkin 
Cc: Paul E. McKenney 
Cc: Peter Zijlstra 
Cc: Thomas Gleixner 
Cc: linux-kernel@vger.kernel.org
Cc: mm-commits@vger.kernel.org
Signed-off-by: Ingo Molnar

c6x: convert to dma_map_ops

2016-01-21T01:09:18+00:00

[dan.carpenter@oracle.com: C6X: fix build breakage]
Signed-off-by: Christoph Hellwig 
Cc: Mark Salter 
Cc: Aurelien Jacquiot 
Cc: Christian Borntraeger 
Cc: Joerg Roedel 
Cc: Sebastian Ott 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Merge tag 'for-linus' of git://linux-c6x.org/git/projects/linux-c6x-upstreaming

2015-04-16T22:48:55+00:00

Pull arch/c6x fixes from Mark Salter.

* tag 'for-linus' of git://linux-c6x.org/git/projects/linux-c6x-upstreaming:
  c6x: platforms: cache: Export symbol L1P_cache_block_invalidate and L1D_cache_block_writeback
  c6x: kernel: setup: Export symbol memory_end
  c6x: kernel: setup: Add screen_info global variable
  c6x: include: asm: Kbuild: Add generic serial.h
  c6x: include: asm: dma-mapping: Add dummy dma_sync_single_range_for_device
  c6x: include: asm: setup: Include "linux/types.h"
  c6x: asm: Add default flat.h according to xtensa architecture
  c6x: kernel: setup: Remove 'const' for local variables in machine_init
  c6x: Makefile: Add -D__linux__
  C6x: time: Ensure consistency in __init
  c6x: kernel: setup: Include "linux/console.h"

whack-a-mole: no need to set_fs(USER_DS) in {start,flush}_thread()

2015-04-12T02:24:31+00:00

flush_old_exec() has already done that.  Back on 2011 a bunch of
instances like that had been kicked out, but that hadn't taken
care of then-out-of-tree architectures, obviously, and they served
as reinfection vector...

Signed-off-by: Al Viro

c6x: kernel: setup: Export symbol memory_end

2015-03-26T14:49:44+00:00

It is needed by several modules, the related error with allmodconfig:

    MODPOST 3327 modules
  ERROR: "memory_end" [net/wireless/lib80211_crypt_tkip.ko] undefined!
  ERROR: "memory_end" [net/sunrpc/sunrpc.ko] undefined!
  ERROR: "memory_end" [net/sunrpc/auth_gss/rpcsec_gss_krb5.ko] undefined!
  ERROR: "memory_end" [net/rxrpc/rxkad.ko] undefined!
  ERROR: "memory_end" [net/mac802154/mac802154.ko] undefined!
  ERROR: "memory_end" [net/mac80211/mac80211.ko] undefined!
  ERROR: "memory_end" [net/ipv6/esp6.ko] undefined!
  ERROR: "memory_end" [net/ipv6/ah6.ko] undefined!
  ERROR: "memory_end" [net/ipv4/esp4.ko] undefined!
  ERROR: "memory_end" [net/ipv4/ah4.ko] undefined!
  ERROR: "memory_end" [net/ceph/libceph.ko] undefined!
  ERROR: "memory_end" [net/9p/9pnet_virtio.ko] undefined!
  ERROR: "memory_end" [drivers/usb/wusbcore/wusbcore.ko] undefined!
  ERROR: "memory_end" [drivers/usb/misc/usbtest.ko] undefined!
  ERROR: "memory_end" [drivers/usb/core/usbcore.ko] undefined!
  ERROR: "memory_end" [drivers/target/target_core_file.ko] undefined!
  ERROR: "memory_end" [drivers/net/wireless/brcm80211/brcmfmac/brcmfmac.ko] undefined!
  ERROR: "memory_end" [drivers/net/wireless/ath/ath6kl/ath6kl_sdio.ko] undefined!
  ERROR: "memory_end" [drivers/net/virtio_net.ko] undefined!
  ERROR: "memory_end" [drivers/net/usb/usbnet.ko] undefined!
  ERROR: "memory_end" [drivers/net/ppp/ppp_mppe.ko] undefined!
  ERROR: "memory_end" [drivers/mtd/nand/nand.ko] undefined!
  ERROR: "memory_end" [drivers/mmc/card/mmc_block.ko] undefined!
  ERROR: "memory_end" [drivers/crypto/qce/qcrypto.ko] undefined!
  ERROR: "memory_end" [drivers/block/drbd/drbd.ko] undefined!
  ERROR: "memory_end" [drivers/block/aoe/aoe.ko] undefined!
  ERROR: "memory_end" [crypto/tcrypt.ko] undefined!
  ERROR: "memory_end" [crypto/gcm.ko] undefined!
  ERROR: "memory_end" [crypto/cts.ko] undefined!
  ERROR: "memory_end" [crypto/ccm.ko] undefined!
  ERROR: "memory_end" [crypto/authencesn.ko] undefined!
  ERROR: "memory_end" [crypto/authenc.ko] undefined!

Signed-off-by: Chen Gang 
Signed-off-by: Mark Salter

c6x: kernel: setup: Add screen_info global variable

2015-03-26T14:49:27+00:00

Or can not pass building with allmodconfig:

    LD      init/built-in.o
  drivers/built-in.o: In function `vgacon_switch':
  vgacon.c:(.text+0x47f8): undefined reference to `screen_info'
  vgacon.c:(.text+0x4810): undefined reference to `screen_info'
  drivers/built-in.o: In function `vgacon_resize':
  vgacon.c:(.text+0x4ac8): undefined reference to `screen_info'
  vgacon.c:(.text+0x4acc): undefined reference to `screen_info'
  drivers/built-in.o: In function `vgacon_save_screen':
  vgacon.c:(.text+0x4cc8): undefined reference to `screen_info'
  drivers/built-in.o:vgacon.c:(.text+0x4cd0): more undefined references to `screen_info' follow

Signed-off-by: Chen Gang 
Signed-off-by: Mark Salter

c6x: kernel: setup: Remove 'const' for local variables in machine_init

2015-03-26T14:31:48+00:00

early_init_dt_scan() accepts "void *", the related warning:

    CC      arch/c6x/kernel/setup.o
  arch/c6x/kernel/setup.c: In function 'machine_init':
  arch/c6x/kernel/setup.c:290:21: warning: passing argument 1 of 'early_init_dt_scan' discards 'const' qualifier from pointer target type [-Wdiscarded-qualifiers]
    early_init_dt_scan(fdt);
                       ^
  In file included from arch/c6x/kernel/setup.c:19:0:
  include/linux/of_fdt.h:75:13: note: expected 'void *' but argument is of type 'const void *'
   extern bool early_init_dt_scan(void *params);
               ^

Signed-off-by: Chen Gang 
Signed-off-by: Mark Salter