28 Jun, 2014
1 commit
-
Pull MIPS fixes from Ralf Baechle:
"This is dominated by a large number of changes necessary for the MIPS
BPF code. code. Aside of that there are- a fix for the MSC system controller support code.
- a Turbochannel fix.
- a recordmcount fix that's MIPS-specific.
- barrier fixes to smp-cps / pm-cps after unrelated changes elsewhere
in the kernel.
- revert support for MSA registers in the signal frames. The
reverted patch did modify the signal stack frame which of course is
inacceptable.
- fix math-emu build breakage with older compilers.
- some related cleanup.
- fix Lasat build error if CONFIG_CRC32 isn't set to y by the user"* 'upstream' of git://git.linux-mips.org/pub/scm/ralf/upstream-linus: (27 commits)
MIPS: Lasat: Fix build error if CRC32 is not enabled.
TC: Handle device_register() errors.
MIPS: MSC: Prevent out-of-bounds writes to MIPS SC ioremap'd region
MIPS: bpf: Fix stack space allocation for BPF memwords on MIPS64
MIPS: BPF: Use 32 or 64-bit load instruction to load an address to register
MIPS: bpf: Fix PKT_TYPE case for big-endian cores
MIPS: BPF: Prevent kernel fall over for >=32bit shifts
MIPS: bpf: Drop update_on_xread and always initialize the X register
MIPS: bpf: Fix is_range() semantics
MIPS: bpf: Use pr_debug instead of pr_warn for unhandled opcodes
MIPS: bpf: Fix return values for VLAN_TAG_PRESENT case
MIPS: bpf: Use correct mask for VLAN_TAG case
MIPS: bpf: Fix branch conditional for BPF_J{GT/GE} cases
MIPS: bpf: Add SEEN_SKB to flags when looking for the PKT_TYPE
MIPS: bpf: Use 'andi' instead of 'and' for the VLAN cases
MIPS: bpf: Return error code if the offset is a negative number
MIPS: bpf: Use the LO register to get division's quotient
MIPS: mm: uasm: Fix lh micro-assembler instruction
MIPS: uasm: Add SLT uasm instruction
MIPS: uasm: Add s3s1s2 instruction builder
...
26 Jun, 2014
1 commit
-
On MIPS calls to _mcount in modules generate 2 instructions to load
the _mcount address (and therefore 2 relocations). The mcount_loc
table should only reference the first of these, so the second is
filtered out by checking the relocation offset and ignoring ones that
immediately follow the previous one seen.However if a module has an _mcount call at offset 0, the second
relocation would not be filtered out due to old_r_offset == 0
being taken to mean that the current relocation is the first one
seen, and both would end up in the mcount_loc table.This results in ftrace_make_nop() patching both (adjacent)
instructions to branches over the _mcount call sequence like so:0xffffffffc08a8000: 04 00 00 10 b 0xffffffffc08a8014
0xffffffffc08a8004: 04 00 00 10 b 0xffffffffc08a8018
0xffffffffc08a8008: 2d 08 e0 03 move at,ra
...The second branch is in the delay slot of the first, which is
defined to be unpredictable - on the platform on which this bug was
encountered, it triggers a reserved instruction exception.Fix by initializing old_r_offset to ~0 and using that instead of 0
to determine whether the current relocation is the first seen.Signed-off-by: Alex Smith
Cc: linux-kernel@vger.kernel.org
Cc: stable@vger.kernel.org
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/7098/
Signed-off-by: Ralf Baechle
24 Jun, 2014
1 commit
-
The previous patch had a few too many false positives on styles that
should be acceptable.Signed-off-by: Joe Perches
Tested-by: Anish Bhatt
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
19 Jun, 2014
1 commit
-
The kernel headers package (linux-headers) doesn't include several
header files required to build out-of-tree modules.It makes the package unusable on e.g. ARM architecture:
/usr/src/linux-headers-3.14.0/arch/arm/include/asm/memory.h:24:25:
fatal error: mach/memory.h: No such file or directory
#include
^
compilation terminated.Signed-off-by: Fathi Boudra
Reviewed-by: Ben Hutchings
Signed-off-by: Michal Marek
18 Jun, 2014
2 commits
-
Commit 7e1c0477 (kbuild: Use relative path for $(objtree)) assumes that
the build process does not change its working directory. make tar-pkg
was a couterexample, fix this by changing directory only for the tar
command and not for the whole script, which at one point references the
now relative $(objtree).Reported-and-tested-by: "J. Bruce Fields"
Signed-off-by: Michal Marek -
When $srctree or $objtree are relative paths, we cannot change directory
and refer to them in the same subshell. Do the redirection outside of
the subshell to fix this.Reported-and-tested-by: Ilya Dryomov
Signed-off-by: Michal Marek
13 Jun, 2014
2 commits
-
Pull kbuild misc updates from Michal Marek:
"This is the non-critical part of kbuild for v3.16-rc1:
- make deb-pkg can do s390x and arm64
- new patterns in scripts/tags.sh
- scripts/tags.sh skips userspace tools' sources (which sometimes
have copies of kernel structures) and symlinks
- improvements to the objdiff tool
- two new coccinelle patches
- other minor fixes"* 'misc' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild:
scripts: objdiff: support directories for the augument of record command
scripts: objdiff: fix a comment
scripts: objdiff: change the extension of disassembly from .o to .dis
scripts: objdiff: improve path flexibility for record command
scripts: objdiff: remove unnecessary code
scripts: objdiff: direct error messages to stderr
scripts: objdiff: get the path to .tmp_objdiff more simply
deb-pkg: Add automatic support for s390x architecture
coccicheck: Add unneeded return variable test
kbuild: Fix a typo in documentation
kbuild: trivial - use tabs for code indent where possible
kbuild: trivial - remove trailing empty lines
coccinelle: Check for missing NULL terminators in of_device_id tables
scripts/tags.sh: ignore symlink'ed source files
scripts/tags.sh: add regular expression replacement pattern for memcg
builddeb: add arm64 in the supported architectures
builddeb: use $OBJCOPY variable instead of objcopy
scripts/tags.sh: ignore code of user space tools
scripts/tags.sh: add pattern for DEFINE_HASHTABLE
.gitignore: ignore Module.symvers in all directories -
Pull kbuild updates from Michal Marek:
"Kbuild changes for v3.16-rc1:- cross-compilation fix so that cc-option is testing the right
compiler
- Fix for make defconfig all
- Using relative paths to the object and source directory where
possible, plus fixes for the fallout of the change
- several cleanups in the Makefiles and scriptsThe powerpc fix is from today, because it was only discovered
recently. The rest has been in linux-next for some time"* 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild:
powerpc: Avoid circular dependency with zImage.%
kbuild: create include/config directory in scripts/kconfig/Makefile
kbuild: do not create include/linux directory
Makefile: Fix unrecognized cross-compiler command line options
kbuild: do not add "selinux" to subdir- twice
um: Fix for relative objtree when generating x86 headers
kbuild: Use relative path when building in a subdir of the source tree
kbuild: Use relative path when building in the source tree
kbuild: Use relative path for $(objtree)
firmware: Use $(quote) in the Makefile
firmware: Simplify directory creation
kbuild: trivial - fix comment block indent
kbuild: trivial - remove trailing spaces
kbuild: support simultaneous "make %config" and "make all"
kbuild: move extra gcc checks to scripts/Makefile.extrawarn
12 Jun, 2014
1 commit
-
Pull module updates from Rusty Russell:
"Most of this is cleaning up various driver sysfs permissions so we can
re-add the perm check (we unified the module param and sysfs checks,
but the module ones were stronger so we weakened them temporarily).Param parsing gets documented, and also "--" now forces args to be
handed to init (and ignored by the kernel).Module NX/RO protections get tightened: we now set them before calling
parse_args()"* tag 'modules-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux:
module: set nx before marking module MODULE_STATE_COMING.
samples/kobject/: avoid world-writable sysfs files.
drivers/hid/hid-picolcd_fb: avoid world-writable sysfs files.
drivers/staging/speakup/: avoid world-writable sysfs files.
drivers/regulator/virtual: avoid world-writable sysfs files.
drivers/scsi/pm8001/pm8001_ctl.c: avoid world-writable sysfs files.
drivers/hid/hid-lg4ff.c: avoid world-writable sysfs files.
drivers/video/fbdev/sm501fb.c: avoid world-writable sysfs files.
drivers/mtd/devices/docg3.c: avoid world-writable sysfs files.
speakup: fix incorrect perms on speakup_acntsa.c
cpumask.h: silence warning with -Wsign-compare
Documentation: Update kernel-parameters.tx
param: hand arguments after -- straight to init
modpost: Fix resource leak in read_dump()
11 Jun, 2014
1 commit
-
Right now when people try to report issues in the kernel they send stack
dumps to eachother, which looks something like this:[ 6.906437] [] ? backtrace_test_irq_callback+0x20/0x20
[ 6.907121] [] dump_stack+0x52/0x7f
[ 6.907640] [] backtrace_regression_test+0x38/0x110
[ 6.908281] [] ? proc_create_data+0xa0/0xd0
[ 6.908870] [] ? proc_modules_init+0x22/0x22
[ 6.909480] [] do_one_initcall+0xc2/0x1e0
[...]However, most of the text you get is pure garbage.
The only useful thing above is the function name. Due to the amount of
different kernel code versions and various configurations being used,
the kernel address and the offset into the function are not really
helpful in determining where the problem actually occured.Too often the result of someone looking at a stack dump is asking the
person who sent it for a translation for one or more 'addr2line'
translations. Which slows down the entire process of debugging the
issue (and really annoying).The decode_stacktrace script is an attempt to make the output more
useful and easy to work with by translating all kernel addresses in the
stack dump into line numbers. Which means that the stack dump would
look like this:[ 635.148361] dump_stack (lib/dump_stack.c:52)
[ 635.149127] warn_slowpath_common (kernel/panic.c:418)
[ 635.150214] warn_slowpath_null (kernel/panic.c:453)
[ 635.151031] _oalloc_pages_slowpath+0x6a/0x7d0
[ 635.152171] ? zone_watermark_ok (mm/page_alloc.c:1728)
[ 635.152988] ? get_page_from_freelist (mm/page_alloc.c:1939)
[ 635.154766] __alloc_pages_nodemask (mm/page_alloc.c:2766)It's pretty obvious why this is better than the previous stack dump
before.Usage is pretty simple:
./decode_stacktrace.sh [vmlinux] [base path]
Where vmlinux is the vmlinux to extract line numbers from and base path
is the path that points to the root of the build tree, for example:./decode_stacktrace.sh vmlinux /home/sasha/linux/ < input.log > output.log
The stack trace should be piped through it (I, for example, just pipe
the output of the serial console of my KVM test box through it).Signed-off-by: Sasha Levin
Signed-off-by: Linus Torvalds
10 Jun, 2014
15 commits
-
For example,
$ scripts/objdiff record init drivers/usb
disassembles all the objects under init and drivers/usb directories.
This feature would be useful when we change various files under the
specific directory.Signed-off-by: Masahiro Yamada
Acked-by: Jason Cooper
Signed-off-by: Michal Marek -
Signed-off-by: Masahiro Yamada
Acked-by: Jason Cooper
Signed-off-by: Michal Marek -
Prior to this commit, the command "scripts/objdiff record path/to/*.o"
disassembled the given object into ".tmp_objdiff/path/to/*.o" file.The problem here is that recorded disassemblies are lost if we run
"make clean" because it removes all the *.o files.
Disassembled code should be dumped into *.dis instead of *.o files.Signed-off-by: Masahiro Yamada
Acked-by: Jason Cooper
Signed-off-by: Michal Marek -
Prior to this commit, scripts/objdiff expected to be run at the top
directory and only the relative path of objects.This commit provides more flexibility in terms of object path:
[1] scripts/objdiff can be run in any directory
For example,
$ scripts/objdiff record init/main.o
and
$ cd init; ../scripts/objdiff record main.o
produce the same result.
[2] Support absolute path for objects
$ scripts/objdiff record /home/foo/bar/linux/init/main.o
work as well.
Signed-off-by: Masahiro Yamada
Acked-by: Jason Cooper
Signed-off-by: Michal Marek -
The directories for objdump is created by the code
a few lines below:[ ! -d "$OBJDIFFD/$dn" ] && mkdir -p "$OBJDIFFD/$dn"
Signed-off-by: Masahiro Yamada
Acked-by: Jason Cooper
Signed-off-by: Michal Marek -
Signed-off-by: Masahiro Yamada
Acked-by: Jason Cooper
Signed-off-by: Michal Marek -
This commit is a minor refactoring.
Temporary files for objdiff are stored in .tmp_objdiff directory
which is located at the top directory.To get the path to this directory,
SRCTREE=`git rev-parse --show-toplevel`
TMPD=$SRCTREE/.tmp_objdiffseems easier to understand than
GIT_DIR=`git rev-parse --git-dir`
TMPD=${GIT_DIR%git}tmp_objdiffBesides, it is not always necessary to create .tmp_objdiff dicrectory.
It should be created only for "record" command.Signed-off-by: Masahiro Yamada
Acked-by: Jason Cooper
Signed-off-by: Michal Marek -
The Debian s390x architecture has 64-bit userland whereas s390 has
32-bit userland. A 64-bit kernel can be used with either. Now that
Debian supports multiarch and officially supports s390x, it makes more
sense to assign a 64-bit kernel package to s390x.Reported-by: Stephen Powell
References: https://bugs.debian.org/750925
Signed-off-by: Ben Hutchings
Signed-off-by: Michal Marek -
This semantic patch looks for variables that are initialized with a
constant, are never updated, and are only used as parameter of return.
Return the constant instead of using a variable.Signed-off-by: Peter Senna Tschudin
Signed-off-by: Michal Marek -
Signed-off-by: Masahiro Yamada
Signed-off-by: Michal Marek -
The directory include/config is used only for
silentoldconfig, localmodconfig, localyesconfig.Signed-off-by: Masahiro Yamada
Signed-off-by: Michal Marek -
Signed-off-by: Masahiro Yamada
-
Failure to terminate an of_device_id table can lead to confusing
failures depending on where the compiler places the array. Add a
check to make sure these tables are terminated. Thanks to Mitchel
Humpherys for coming up with the pattern initially.Cc: Mitchel Humpherys
Cc: Gilles Muller
Cc: Nicolas Palix
Cc: Rob Herring
Cc: devicetree@vger.kernel.org
Signed-off-by: Stephen Boyd
Acked-by: Grant Likely
Signed-off-by: Julia Lawall
Signed-off-by: Michal Marek -
scripts/Makefile adds "selinux" to subdir-y or subdir- twice.
subdir-$(CONFIG_MODVERSIONS) += genksyms
subdir-y += mod
subdir-$(CONFIG_SECURITY_SELINUX) += selinux
Signed-off-by: Michal Marek -
Since commit 22d651dcef536c75f75537290bf3da5038e68b6b ('selftests/powerpc:
Import Anton's memcpy / copy_tofrom_user tests'), some source files in the
tree appear as symlink.
Until commit 8c38a5328af8080bc69a25b3e4e144b03eeea95e ('scripts/tags.sh:
ignore code of user space tools'), those symlinks made cscope report some
warnings:$ make ALLSOURCE_ARCHS=all O=./obj-cscope/ cscope
GEN cscope
cscope: cannot find
file .../tools/testing/selftests/powerpc/copyloops/copyuser_power7.S
cscope: cannot find
file .../tools/testing/selftests/powerpc/copyloops/memcpy_64.S
cscope: cannot find
file .../tools/testing/selftests/powerpc/copyloops/memcpy_power7.S
cscope: cannot find
file .../tools/testing/selftests/powerpc/copyloops/copyuser_64.SIn order to prevent the same kind of warnings to be triggered by future
addition of symlinks, the best option is to ignore all symlinks when
building the file list to be processed by cscope (and other tools
supported by scripts/tags.sh).Ignoring symlinks won't hide source files from cscope (and others) as the
target of these symlinks already appear somewhere else in the tree, and,
as such, should be processed by cscope (or others).Note that, cscope, when used with -R option to make it find the files to
process by itself, already skip symlinks: it's not expected that cscope
access source files through symlink.On top of commit 8c38a5328af8080bc69a25b3e4e144b03eeea95e ('scripts/tags.sh:
ignore code of user space tools'), scripts/tags.sh output from
"make cscope tags TAGS" is the same with and without this patch: it doesn't
seems to introduce any regression (on Fedora 20).Link: http://lkml.kernel.org/r/1396530975.4361.28.camel@localhost.localdomain
Link: http://mid.gmane.org/534312F8.5090609@t-online.de
Cc: Michael Ellerman
Cc: Anton Blanchard
Cc: Benjamin Herrenschmidt
Cc: Hans-Bernhard Bröker ,
Cc: Hans-Bernhard Broeker ,
Cc: Neil Horman
Cc: Neil Horman
Cc: Gerhard Sittig
Cc: Konstantin Khlebnikov
Signed-off-by: Yann Droneaud
Signed-off-by: Michal Marek
07 Jun, 2014
1 commit
-
Pull arm64 updates from Catalin Marinas:
- Optimised assembly string/memory routines (based on the AArch64
Cortex Strings library contributed to glibc but re-licensed under
GPLv2)
- Optimised crypto algorithms making use of the ARMv8 crypto extensions
(together with kernel API for using FPSIMD instructions in interrupt
context)
- Ftrace support
- CPU topology parsing from DT
- ESR_EL1 (Exception Syndrome Register) exposed to user space signal
handlers for SIGSEGV/SIGBUS (useful to emulation tools like Qemu)
- 1GB section linear mapping if applicable
- Barriers usage clean-up
- Default pgprot clean-upConflicts as per Catalin.
* tag 'arm64-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux: (57 commits)
arm64: kernel: initialize broadcast hrtimer based clock event device
arm64: ftrace: Add system call tracepoint
arm64: ftrace: Add CALLER_ADDRx macros
arm64: ftrace: Add dynamic ftrace support
arm64: Add ftrace support
ftrace: Add arm64 support to recordmcount
arm64: Add 'notrace' attribute to unwind_frame() for ftrace
arm64: add __ASSEMBLY__ in asm/insn.h
arm64: Fix linker script entry point
arm64: lib: Implement optimized string length routines
arm64: lib: Implement optimized string compare routines
arm64: lib: Implement optimized memcmp routine
arm64: lib: Implement optimized memset routine
arm64: lib: Implement optimized memmove routine
arm64: lib: Implement optimized memcpy routine
arm64: defconfig: enable a few more common/useful options in defconfig
ftrace: Make CALLER_ADDRx macros more generic
arm64: Fix deadlock scenario with smp_send_stop()
arm64: Fix machine_shutdown() definition
arm64: Support arch_irq_work_raise() via self IPIs
...
05 Jun, 2014
9 commits
-
This patch adds a link to init.h to find appropriate initcall function to
replace obsolete __initcallSigned-off-by: Fabian Frederick
Cc: Andy Whitcroft
Cc: Joe Perches
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
It should be stable@vger.kernel.org, not stable@kernel.org.
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
void function lines that use a single tab then "return;" are generally
unnecessary.Signed-off-by: Joe Perches
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Use the kstrto functions in preference to sscanf.
Signed-off-by: Joe Perches
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Protect against sizeof overflows by preferring kmalloc_array/kcalloc over
kmalloc/kzalloc with a sizeof multiply.Signed-off-by: Joe Perches
Cc: Andy Whitcroft
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Using a #define ending in a semicolon is poor style and can lead to
unexpected code paths being executed.Warn on uses of these #define types:
#define foo[(...)] bar;
#define foo[(...)] \
bar;Based on a patch from Borislav Petkov.
Signed-off-by: Joe Perches
Cc: Borislav Petkov
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Networking files are generally more strictly conformant to linux-kernel
style so make checkpatch more verbose by default for patches to files or
when checking files in these directories.Signed-off-by: Joe Perches
Cc: Andy Whitcroft
Cc: David Miller
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Make the test system wide, modify the message too.
Signed-off-by: Joe Perches
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
We attempt to search for compatible strings which use a variable token in
the documented name such as or . While this was attempted to
be handled, it's utterly broken.The desired forms of matching are:
vendor,-*
vendor,name-*For , lower case characters and numbers are permitted. For ,
only numeric values are allowed.With this change, the number of missing compatible strings reported in
arch/arm/boot/dts is reduced from 1071 to 960.Reported-by: Alexandre Belloni
Signed-off-by: Rob Herring
Tested-by: Geert Uytterhoeven
Cc: Florian Vaussard
Cc: Joe Perches
Cc: Andy Whitcroft
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
04 Jun, 2014
1 commit
-
Pull trivial tree changes from Jiri Kosina:
"Usual pile of patches from trivial tree that make the world go round"* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (23 commits)
staging: go7007: remove reference to CONFIG_KMOD
aic7xxx: Remove obsolete preprocessor define
of: dma: doc fixes
doc: fix incorrect formula to calculate CommitLimit value
doc: Note need of bc in the kernel build from 3.10 onwards
mm: Fix printk typo in dmapool.c
modpost: Fix comment typo "Modules.symvers"
Kconfig.debug: Grammar s/addition/additional/
wimax: Spelling s/than/that/, wording s/destinatary/recipient/
aic7xxx: Spelling s/termnation/termination/
arm64: mm: Remove superfluous "the" in comment
of: Spelling s/anonymouns/anonymous/
dma: imx-sdma: Spelling s/determnine/determine/
ath10k: Improve grammar in comments
ath6kl: Spelling s/determnine/determine/
of: Improve grammar for of_alias_get_id() documentation
drm/exynos: Spelling s/contro/control/
radio-bcm2048.c: fix wrong overflow check
doc: printk-formats: do not mention casts for u64/s64
doc: spelling error changes
...
29 May, 2014
1 commit
-
Recordmcount utility under scripts is run, after compiling each object,
to find out all the locations of calling _mcount() and put them into
specific seciton named __mcount_loc.
Then linker collects all such information into a table in the kernel image
(between __start_mcount_loc and __stop_mcount_loc) for later use by ftrace.This patch adds arm64 specific definitions to identify such locations.
There are two types of implementation, C and Perl. On arm64, only C version
is used to build the kernel now that CONFIG_HAVE_C_RECORDMCOUNT is on.
But Perl version is also maintained.This patch also contains a workaround just in case where a header file,
elf.h, on host machine doesn't have definitions of EM_AARCH64 nor
R_AARCH64_ABS64. Without them, compiling C version of recordmcount will
fail.Acked-by: Will Deacon
Signed-off-by: AKASHI Takahiro
Signed-off-by: Will Deacon
20 May, 2014
1 commit
-
The new renameat2 syscall provides all the functionality of renameat
with an additional flags argument, so make renameat optional so that
future architectures can omit it without getting a warning.This patch doesn't affect existing architectures.
Signed-off-by: James Hogan
Acked-by: Arnd Bergmann
Signed-off-by: Miklos Szeredi
Cc: linux-arch@vger.kernel.org
15 May, 2014
1 commit
-
When building the firmware blobs, use a simple loop to create
directories in $(objtree), like in Makefile.build. This simplifies the
rules and also makes it possible to set $(objtree) to '.' later. Before
this change, a dependency on $(objtree)/ would be satisfied by
in $(srctree).When installing the firmware blobs, call mkdir like in Makefile.modinst.
Cc: David Woodhouse
Acked-by: Sam Ravnborg
Signed-off-by: Michal Marek
14 May, 2014
1 commit
-
Currently, while using ctags to read code, we would get stumbled on
PageCgroup* symbols: no definition found. And it is quite dull to
manually dig it out.This patch adds regular expression replacement pattern for such symbols,
like what have done for the PageXXX flag. It will teach ctags to find
out the definition for us.Signed-off-by: Jianyu Zhan
Signed-off-by: Michal Marek
