15 Sep, 2011
9 commits
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richard@nod.at:
Fixes:
/usr/lib/gcc/x86_64-linux-gnu/4.4.5/../../../../lib/libc.a(strrchr.o): In function `rindex':
(.text+0x0): multiple definition of `strrchr'If both STATIC_LINK and UML_NET_VDE are set to "y" libc's strrchr may
clash with the kernel implementation.This workaround comes originally from Jeff Dike:
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=494995#35Signed-off-by: Al Viro
Signed-off-by: Richard Weinberger
Cc: Jeff Dike
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
1) take subarch-specific stuff to subarch_ptrace()
2) PTRACE_{PEEK,POKE}{TEXT,DATA} is handled by ptrace_request() just fine...Signed-off-by: Al Viro
Signed-off-by: Richard Weinberger
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
It's 32bit-only, not 64bit-only... And while we are at it, it's
set_fpxregs(), not set_fpregs()...Signed-off-by: Al Viro
Signed-off-by: Richard Weinberger
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
while not doing free_irq() from irq handler is commendable, kfree() on the
data passed to said handler before free_irq() is Not Good(tm). Freeing
the stack it's being run on is also not nice... Solution: delay actually
freeing stuff.Signed-off-by: Al Viro
Signed-off-by: Richard Weinberger
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
... so set winch->fd to -1 before doing free_irq(), to avoid having
winch_interrupt() come from/during the latter and attempt to do
reactivate_fd() on something that's already gone.Signed-off-by: Al Viro
Signed-off-by: Richard Weinberger
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
tty->count is decremented only after ->close() had been called and
several tasks can hit it in parallel. As the result, using tty->count
to check if you are the last one is broken. We end up leaving line->tty
not reset to NULL and the next IRQ on that sucker will blow up trying to
dereference pointers from kfree'd struct tty.Fix is obvious: we need to use a counter of our own.
Signed-off-by: Al Viro
Signed-off-by: Richard Weinberger
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Some time ago Jeff prepared 42daba316557 ("uml: stop saving process FP
state") for UML to stop saving the process FP state between task
switches. The assumption was that since with SKAS0 every guest process
runs inside a host process context the host OS will take care of keeping
the proper FP state.Unfortunately this is not true for multi-threaded applications, where
all guest threads share a single host process context yet all may use
the FPU on their own. Although I haven't verified it I suspect things
to be even worse in SKAS3 mode where all guest processes run inside a
single host process.The patch reintroduces the saving and restoring of the FP context
between task switches.[richard@nod.at: Ingo posted this patch in 2009, sadly it was never applied
and got lost. Now in 2011 the problem was reported by Gunnar.]Signed-off-by: Ingo van Lil
Signed-off-by: Richard Weinberger
Reported-by:
Tested-by:
Cc: Stanislav Meduna
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
I could use out_close1, but that seems to be the code path to close the fd
returned by os_create_unix_socket, and using it to close the fd returned
by mkstemp might lead to some confusion, so I don't do it.Signed-off-by: Jonathan Neuschäfer
Signed-off-by: Richard Weinberger
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Commit b789ef518b2 ("slub: Add cmpxchg_double_slab()") tests for
cmpxchg_double support in the SLUB code and it breaks UML builds with
SLUB. Since UML does not support checking for CPU features, disable
CMPXCHG_DOUBLE just like CMPXCHG_LOCAL is disabled for UML.Signed-off-by: Thadeu Lima de Souza Cascardo
Reviewed-by: Christoph Lameter
Cc: Jeff Dike
Cc: Richard Weinberger
Signed-off-by: Richard Weinberger
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
27 Jul, 2011
1 commit
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[ poleg@redhat.com: no need to declare show_regs() in ptrace.h, sched.h does this ]
Signed-off-by: Mike Frysinger
Cc: Tejun Heo
Signed-off-by: Oleg Nesterov
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
26 Jul, 2011
19 commits
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* Merge akpm patch series: (122 commits)
drivers/connector/cn_proc.c: remove unused local
Documentation/SubmitChecklist: add RCU debug config options
reiserfs: use hweight_long()
reiserfs: use proper little-endian bitops
pnpacpi: register disabled resources
drivers/rtc/rtc-tegra.c: properly initialize spinlock
drivers/rtc/rtc-twl.c: check return value of twl_rtc_write_u8() in twl_rtc_set_time()
drivers/rtc: add support for Qualcomm PMIC8xxx RTC
drivers/rtc/rtc-s3c.c: support clock gating
drivers/rtc/rtc-mpc5121.c: add support for RTC on MPC5200
init: skip calibration delay if previously done
misc/eeprom: add eeprom access driver for digsy_mtc board
misc/eeprom: add driver for microwire 93xx46 EEPROMs
checkpatch.pl: update $logFunctions
checkpatch: make utf-8 test --strict
checkpatch.pl: add ability to ignore various messages
checkpatch: add a "prefer __aligned" check
checkpatch: validate signature styles and To: and Cc: lines
checkpatch: add __rcu as a sparse modifier
checkpatch: suggest using min_t or max_t
...Did this as a merge because of (trivial) conflicts in
- Documentation/feature-removal-schedule.txt
- arch/xtensa/include/asm/uaccess.h
that were just easier to fix up in the merge than in the patch series. -
GCC 4.6's -Wunused-but-set-variable found some dead code.
Signed-off-by: Richard Weinberger
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Linux can have pids up to 4*1024*1024. To handle such huge numbers
pid_buf needs to be larger.Reported-by: Geert Uytterhoeven
Signed-off-by: Richard Weinberger
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Until now UML had no x86_64 vDSO. So glibc always used the vsyscall page
for gettimeday() and friends. Calls to gettimeday() returned falsely the
host time and confused some programs.This patch adds a vDSO which turns all __vdso_* calls into a system call
so that UML can trap them.As glibc still uses the vsyscall page for static binaries this patch
improves the situation only for dynamic binaries.Signed-off-by: Richard Weinberger
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Implement arch_vma_name() and make get_gate_vma(), in_gate_area() and
in_gate_area_no_mm() a nop.We need arch_vma_name() to support vDSO.
Signed-off-by: Richard Weinberger
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
When UML is unable to reuse the host's vDSO FIXADDR_USER_START is zero.
To handle this special case correclty we have to implement custom gate
area helper methods.Signed-off-by: Richard Weinberger
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Reusing the host's vDSO makes only sense on x86_32.
Signed-off-by: Richard Weinberger
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
When creating the temp file there's a memory and file descriptor leak upon
error.Signed-off-by: Davidlohr Bueso
Signed-off-by: Richard Weinberger
Reviewed-by: Vitaliy Ivanov
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Do not free memory when you failed to allocate it.
Signed-off-by: Vitaliy Ivanov
Signed-off-by: Richard Weinberger
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Fix this warning:
arch/um/os-Linux/helper.c: In function `helper_child':
arch/um/os-Linux/helper.c:38:7: warning: ignoring return value of `write', declared with attribute warn_unused_result[richard@nod.at: happens only with -D_FORTIFY_SOURCE=2]
Signed-off-by: Vitaliy Ivanov
Signed-off-by: Richard Weinberger
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Fix this warning:
arch/um/drivers/cow_user.c: In function `absolutize':
arch/um/drivers/cow_user.c:189:7: warning: ignoring return value of `chdir', declared with attribute warn_unused_result[richard@nod.at: happens only with -D_FORTIFY_SOURCE=2]
Signed-off-by: Vitaliy Ivanov
Signed-off-by: Richard Weinberger
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Perform memory cleanup on exit. On receiving invalid 'pid' we still
should clean 'output' variable.Signed-off-by: Vitaliy Ivanov
Signed-off-by: Richard Weinberger
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Commit 0954828fcbf3 ("kconfig: replace KERNELVERSION usage by the
mainmenu's prompt") made the kernel version disappear from the generated
.config file when configuring for UML. As UML's Kconfig doesn't have a
mainmenu, kconfig falls back to the default string "Linux Kernel
Configuration".Add a suitable mainmenu to the main UML Kconfig file to fix this.
Signed-off-by: Geert Uytterhoeven
Signed-off-by: Richard Weinberger
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
To make netconsole usable on UML, its ethernet driver needs netpoll
support.Signed-off-by: Richard Weinberger
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
When UML is compiled with _FORTIFY_SOURCE we have to export all _chk()
functions which are used in modules. For now it's only the case for
__sprintf_chk().Tested-by: Florian Fainelli
Reported-by: Florian Fainelli
Signed-off-by: Richard Weinberger
Acked-by: Vitaliy Ivanov
Cc: Geert Uytterhoeven
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Both sys-i386 and sys-x86_64 support now ndelay(). The delay functions
are based on arch/x86/lib/delay.c.Signed-off-by: Richard Weinberger
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The address limit is already set in flush_old_exec() so this
set_fs(USER_DS) is redundant.Signed-off-by: Mathias Krause
Cc: Richard Weinberger
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
There is no need to define VM_{STACK,DATA}_DEFAULT_FLAGS as variable.
It's also useless to test for TIF_IA32 as 64bit UML has no IA32 emulation.Signed-off-by: Richard Weinberger
Acked-by: Randy Dunlap
Cc: Michal Hocko
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (43 commits)
fs: Merge split strings
treewide: fix potentially dangerous trailing ';' in #defined values/expressions
uwb: Fix misspelling of neighbourhood in comment
net, netfilter: Remove redundant goto in ebt_ulog_packet
trivial: don't touch files that are removed in the staging tree
lib/vsprintf: replace link to Draft by final RFC number
doc: Kconfig: `to be' -> `be'
doc: Kconfig: Typo: square -> squared
doc: Konfig: Documentation/power/{pm => apm-acpi}.txt
drivers/net: static should be at beginning of declaration
drivers/media: static should be at beginning of declaration
drivers/i2c: static should be at beginning of declaration
XTENSA: static should be at beginning of declaration
SH: static should be at beginning of declaration
MIPS: static should be at beginning of declaration
ARM: static should be at beginning of declaration
rcu: treewide: Do not use rcu_read_lock_held when calling rcu_dereference_check
Update my e-mail address
PCIe ASPM: forcedly -> forcibly
gma500: push through device driver tree
...Fix up trivial conflicts:
- arch/arm/mach-ep93xx/dma-m2p.c (deleted)
- drivers/gpio/gpio-ep93xx.c (renamed and context nearby)
- drivers/net/r8169.c (just context changes)
24 Jul, 2011
1 commit
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…us' and 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
um: Make rwsem.S depend on CONFIG_RWSEM_XCHGADD_ALGORITHM* 'core-debug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
debug: Make CONFIG_EXPERT select CONFIG_DEBUG_KERNEL to unhide debug options* 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
genirq: Remove unused CHECK_IRQ_PER_CPU()* 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
perf tools, x86: Fix 32-bit compile on 64-bit system
23 Jul, 2011
2 commits
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* 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
x86: Fix write lock scalability 64-bit issue
x86: Unify rwsem assembly implementation
x86: Unify rwlock assembly implementation
x86, asm: Fix binutils 2.16 issue with __USER32_CS
x86, asm: Cleanup thunk_64.S
x86, asm: Flip RESTORE_ARGS arguments logic
x86, asm: Flip SAVE_ARGS arguments logic
x86, asm: Thin down SAVE/RESTORE_* asm macros -
rwsem.S can only be used with CONFIG_RWSEM_XCHGADD_ALGORITHM.
This unbreaks the UML build on i386.Reported-by: Randy Dunlap
Acked-by: Randy Dunlap
Signed-off-by: Richard Weinberger
Cc: Stephen Rothwell
Cc: user-mode-linux-devel@lists.sourceforge.net
Cc: JBeulich@novell.com
Link: http://lkml.kernel.org/r/201107222055.35341.richard@nod.at
Signed-off-by: Ingo Molnar
21 Jul, 2011
2 commits
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All these are instances of
#define NAME value;
or
#define NAME(params_opt) value;These of course fail to build when used in contexts like
if(foo $OP NAME)
while(bar $OP NAME)
and may silently generate the wrong code in contexts such as
foo = NAME + 1; /* foo = value; + 1; */
bar = NAME - 1; /* bar = value; - 1; */
baz = NAME & quux; /* baz = value; & quux; */Reported on comp.lang.c,
Message-ID:
Initial analysis of the dangers provided by Keith Thompson in that thread.There are many more instances of more complicated macros having unnecessary
trailing semicolons, but this pile seems to be all of the cases of simple
values suffering from the problem. (Thus things that are likely to be found
in one of the contexts above, more complicated ones aren't.)Signed-off-by: Phil Carmody
Signed-off-by: Jiri Kosina -
Rather than having two functionally identical implementations
for 32- and 64-bit configurations, use the previously extended
assembly abstractions to fold the rwsem two implementations into
a shared one.Signed-off-by: Jan Beulich
Cc: Linus Torvalds
Cc: Andrew Morton
Cc: Peter Zijlstra
Link: http://lkml.kernel.org/r/4E258DF3020000780004E3ED@nat28.tlf.novell.com
Signed-off-by: Ingo Molnar
28 Jun, 2011
1 commit
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To make SLUB work on UML we need this_cpu_cmpxchg from
asm-generic/percpu.h.Signed-off-by: Richard Weinberger
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
27 May, 2011
1 commit
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By the previous style change, CONFIG_GENERIC_FIND_NEXT_BIT,
CONFIG_GENERIC_FIND_BIT_LE, and CONFIG_GENERIC_FIND_LAST_BIT are not used
to test for existence of find bitops anymore.Signed-off-by: Akinobu Mita
Acked-by: Greg Ungerer
Cc: Arnd Bergmann
Cc: Russell King
Cc: Martin Schwidefsky
Cc: Heiko Carstens
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
25 May, 2011
4 commits
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Most arches define CONFIG_DEBUG_STACK_USAGE exactly the same way. Move it
to lib/Kconfig.debug so each arch doesn't have to define it. This
obviously makes the option generic, but that's fine because the config is
already used in generic code.It's not obvious to me that sysrq-P actually does anything caution by
keeping the most inclusive wording.Signed-off-by: Stephen Boyd
Cc: Chris Metcalf
Acked-by: David S. Miller
Acked-by: Richard Weinberger
Acked-by: Mike Frysinger
Cc: Russell King
Cc: Hirokazu Takata
Acked-by: Ralf Baechle
Cc: Paul Mackerras
Acked-by: Benjamin Herrenschmidt
Cc: Chen Liqin
Cc: Lennox Wu
Cc: Ingo Molnar
Cc: Thomas Gleixner
Cc: "H. Peter Anvin"
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This constant hasn't been used since before the git era (2.6.12) and thus
can be dropped.Signed-off-by: Stephen Boyd
Cc: Russell King
Cc: Richard Weinberger
Cc: Hirokazu Takata
Cc: Kyle McMartin
Cc: Richard Henderson
Cc: Ivan Kokshaysky
Cc: Matt Turner
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
os_dump_core() emits SIGTERM to terminate all UML processes. Kernel
threads have to exit on SIGTERM instead of calling last_ditch_exit().
Multiple calls to last_ditch_exit() can cause a crash.Signed-off-by: Richard Weinberger
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Fix build failures on UML.
Signed-off-by: Richard Weinberger
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
