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2012-07-28TTY: um/line, use tty from tty_portJiri Slaby3-9/+21
This means switching to the tty refcounted model so that we will not race with interrupts. Signed-off-by: Jiri Slaby <[email protected]> Cc: Jeff Dike <[email protected]> Cc: Richard Weinberger <[email protected]> Cc: [email protected] Signed-off-by: Richard Weinberger <[email protected]>
2012-07-28TTY: um/line, add tty_portJiri Slaby2-4/+5
And use count from there. Signed-off-by: Jiri Slaby <[email protected]> Cc: Jeff Dike <[email protected]> Cc: Richard Weinberger <[email protected]> Cc: [email protected] Signed-off-by: Richard Weinberger <[email protected]>
2012-07-19Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netDavid S. Miller1-1/+0
Conflicts: drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c
2012-07-19um: remove IRQF_SAMPLE_RANDOM which is now a no-opTheodore Ts'o5-17/+11
With the changes in the random tree, IRQF_SAMPLE_RANDOM is now a no-op; interrupt randomness is now collected unconditionally in a very low-overhead fashion; see commit 775f4b297b. The IRQF_SAMPLE_RANDOM flag was scheduled to be removed in 2009 on the feature-removal-schedule, so this patch is preparation for the final removal of this flag. Signed-off-by: "Theodore Ts'o" <[email protected]> Cc: Jeff Dike <[email protected]> Cc: Richard Weinberger <[email protected]>
2012-07-16arch: Use eth_random_addrJoe Perches1-1/+1
Convert the existing uses of random_ether_addr to the new eth_random_addr. Signed-off-by: Joe Perches <[email protected]> Acked-by: Mike Frysinger <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2012-07-02Revert "rcu: Move PREEMPT_RCU preemption to switch_to() invocation"Paul E. McKenney1-1/+0
This reverts commit 616c310e83b872024271c915c1b9ab505b9efad9. (Move PREEMPT_RCU preemption to switch_to() invocation). Testing by Sasha Levin <[email protected]> showed that this can result in deadlock due to invoking the scheduler when one of the runqueue locks is held. Because this commit was simply a performance optimization, revert it. Reported-by: Sasha Levin <[email protected]> Signed-off-by: Paul E. McKenney <[email protected]> Tested-by: Sasha Levin <[email protected]>
2012-05-23Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/umlLinus Torvalds5-9/+10
Pull UML updates from Richard Weinberger: "Most changes are bug fixes and cleanups" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml: um: missing checks of __put_user()/__get_user() return values um: stub_rt_sigsuspend isn't needed these days anymore um/x86: merge (and trim) 32- and 64-bit variants of ptrace.h irq: Remove irq_chip->release() um: Remove CONFIG_IRQ_RELEASE_METHOD um: Remove usage of irq_chip->release() um: Implement um_free_irq() um: Fix __swp_type() um: Implement a custom pte_same() function um: Add BUG() to do_ops()'s error path um: Remove unused variables um: bury unused _TIF_RESTORE_SIGMASK um: wrong sigmask saved in case of multiple sigframes um: add TIF_NOTIFY_RESUME um: ->restart_block.fn needs to be reset on sigreturn
2012-05-21um: Implement um_free_irq()Richard Weinberger5-9/+10
Instead of using chip->release() we can achieve the same using a simple wrapper for free_irq(). We have already um_request_irq(), so um_free_irq() is the perfect counterpart. Signed-off-by: Richard Weinberger <[email protected]> Reviewed-by: Thomas Gleixner <[email protected]>
2012-05-02rcu: Move PREEMPT_RCU preemption to switch_to() invocationPaul E. McKenney1-0/+1
Currently, PREEMPT_RCU readers are enqueued upon entry to the scheduler. This is inefficient because enqueuing is required only if there is a context switch, and entry to the scheduler does not guarantee a context switch. The commit therefore moves the enqueuing to immediately precede the call to switch_to() from the scheduler. Signed-off-by: Paul E. McKenney <[email protected]> Signed-off-by: Paul E. McKenney <[email protected]> Tested-by: Linus Torvalds <[email protected]>
2012-04-10um: Disintegrate asm/system.hRichard Weinberger1-0/+1
Signed-off-by: Richard Weinberger <[email protected]> Reported-by: Toralf Förster <[email protected]> CC: [email protected]
2012-04-10um: switch cow_user.h to htobe{32,64}/betoh{32,64}Al Viro2-57/+21
... rather than open-coding the 64bit versions. endian.h has those guys. Signed-off-by: Al Viro <[email protected]> Signed-off-by: Richard Weinberger <[email protected]>
2012-03-27Merge branch 'for-linus-3.4-rc1' of ↵Linus Torvalds15-366/+292
git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml Pull UML changes from Richard Weinberger: "Mostly bug fixes and cleanups" * 'for-linus-3.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml: (35 commits) um: Update defconfig um: Switch to large mcmodel on x86_64 MTD: Relax dependencies um: Wire CONFIG_GENERIC_IO up um: Serve io_remap_pfn_range() Introduce CONFIG_GENERIC_IO um: allow SUBARCH=x86 um: most of the SUBARCH uses can be killed um: deadlock in line_write_interrupt() um: don't bother trying to rebuild CHECKFLAGS for USER_OBJS um: use the right ifdef around exports in user_syms.c um: a bunch of headers can be killed by using generic-y um: ptrace-generic.h doesn't need user.h um: kill HOST_TASK_PID um: remove pointless include of asm/fixmap.h from asm/pgtable.h um: asm-offsets.h might as well come from underlying arch... um: merge processor_{32,64}.h a bit... um: switch close_chan() to struct line um: race fix: initialize delayed_work *before* registering IRQ um: line->have_irq is never checked... ...
2012-03-25um: deadlock in line_write_interrupt()Al Viro1-0/+1
Signed-off-by: Al Viro <[email protected]> Signed-off-by: Richard Weinberger <[email protected]>
2012-03-25um: switch close_chan() to struct lineAl Viro3-9/+11
... and switch chan_interrupt() to directly calling close_one_chan(), so we can lose delay_free_irq argument of close_chan() as well. Signed-off-by: Al Viro <[email protected]> Signed-off-by: Richard Weinberger <[email protected]>
2012-03-25um: race fix: initialize delayed_work *before* registering IRQAl Viro3-18/+15
... since chan_interrupt() might schedule it if there's too much incoming data. Kill task argument of chan_interrupt(), while we are at it - it's always &line->task. Signed-off-by: Al Viro <[email protected]> Signed-off-by: Richard Weinberger <[email protected]>
2012-03-25um: line->have_irq is never checked...Al Viro2-2/+0
looks like a half-arsed duplicate of line->enabled Signed-off-by: Al Viro <[email protected]> Signed-off-by: Richard Weinberger <[email protected]>
2012-03-25um: chan_init_pri is dead nowAl Viro1-2/+0
Signed-off-by: Al Viro <[email protected]> Signed-off-by: Richard Weinberger <[email protected]>
2012-03-25um: switch users of ->chan_list to ->chan_{in,out} (easy cases)Al Viro5-128/+88
Signed-off-by: Al Viro <[email protected]> Signed-off-by: Richard Weinberger <[email protected]>
2012-03-25um: sorting out the chan mess, part 1Al Viro2-0/+5
put references to in and out chans associated with line into explicit struct chan * fields in it. Signed-off-by: Al Viro <[email protected]> Signed-off-by: Richard Weinberger <[email protected]>
2012-03-25um: finally kill ->init_str leaksAl Viro1-1/+3
now we can do that... Signed-off-by: Al Viro <[email protected]> Signed-off-by: Richard Weinberger <[email protected]>
2012-03-25um: get rid of lines_init()Al Viro4-46/+33
move config-independent parts of initialization into register_lines(), call setup_one_line() after it instead of abusing ->init_str. Signed-off-by: Al Viro <[email protected]> Signed-off-by: Richard Weinberger <[email protected]>
2012-03-25um: switch line.c tty drivers to dynamic device creationAl Viro4-42/+40
Current code doesn't update the symlinks in /sys/dev/char when we add/remove tty lines. Fixing that allows to stop messing with ->valid before the driver registration, which is a Good Thing(tm) - we shouldn't have it set before we really have the things set up and ready for line_open(). We need tty_driver available to call tty_{un,}register_device(), so we just stash a reference to it into struct line_driver. Signed-off-by: Al Viro <[email protected]> Signed-off-by: Richard Weinberger <[email protected]>
2012-03-25um: fix races between line_open() and line_config()Al Viro2-28/+29
Pull parse_chan_pair() call into setup_one_line(), under the mutex. We really don't want open() to succeed before parse_chan_pair() had been done (or after it has failed, BTW). We also want "remove con<n>" to free irqs, etc., same as "config con<n>=none". Signed-off-by: Al Viro <[email protected]> Signed-off-by: Richard Weinberger <[email protected]>
2012-03-25um: convert count_lock to mutex, fix a race in line_open()Al Viro4-20/+12
If two processes are opening the same line, the second to get into line_open() will decide that it doesn't need to do anything (correctly) or wait for anything. The latter, unfortunately, is incorrect - the first opener might not be through yet. We need to have exclusion covering the entire line_init(), including the blocking parts. Moreover, the next patch will need to widen the exclusion on mconsole side of things, also including the blocking bits, so let's just convert that sucker to mutex... Signed-off-by: Al Viro <[email protected]> Signed-off-by: Richard Weinberger <[email protected]>
2012-03-25um: get rid of the init_prio messAl Viro4-74/+68
make line_setup() act on a separate array of conf strings + default conf, have lines array initialized explicitly by that data, bury LINE_INIT() macro from hell. Signed-off-by: Al Viro <[email protected]> Signed-off-by: Richard Weinberger <[email protected]>
2012-03-25um: switch line_config() to setup_one_line()Al Viro1-6/+16
Signed-off-by: Al Viro <[email protected]> Signed-off-by: Richard Weinberger <[email protected]>
2012-03-25um: switch line_remove() to setup_one_line()Al Viro1-8/+5
Signed-off-by: Al Viro <[email protected]> Signed-off-by: Richard Weinberger <[email protected]>
2012-03-25um: clean up the includes in ubdAl Viro3-34/+18
Signed-off-by: Al Viro <[email protected]> Signed-off-by: Richard Weinberger <[email protected]>
2012-03-25um: irq: Remove IRQF_DISABLEDYong Zhang7-11/+11
Since commit [e58aa3d2: genirq: Run irq handlers with interrupts disabled], We run all interrupt handlers with interrupts disabled and we even check and yell when an interrupt handler returns with interrupts enabled (see commit [b738a50a: genirq: Warn when handler enables interrupts]). So now this flag is a NOOP and can be removed. Signed-off-by: Yong Zhang <[email protected]> Signed-off-by: Richard Weinberger <[email protected]>
2012-02-17UML net: set addr_assign_type if random_ether_addr() usedDanny Kukawka1-3/+8
Set addr_assign_type correctly to NET_ADDR_RANDOM in case a random MAC address was generated and assigned to the netdevice. Return state from setup_etheraddr() about returning a random MAC address or not and check this state in eth_configure(). Signed-off-by: Danny Kukawka <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2011-11-02Merge branch 'for-linus' of git://github.com/richardweinberger/linuxLinus Torvalds28-46/+422
* 'for-linus' of git://github.com/richardweinberger/linux: (90 commits) um: fix ubd cow size um: Fix kmalloc argument order in um/vdso/vma.c um: switch to use of drivers/Kconfig UserModeLinux-HOWTO.txt: fix a typo UserModeLinux-HOWTO.txt: remove ^H characters um: we need sys/user.h only on i386 um: merge delay_{32,64}.c um: distribute exports to where exported stuff is defined um: kill system-um.h um: generic ftrace.h will do... um: segment.h is x86-only and needed only there um: asm/pda.h is not needed anymore um: hw_irq.h can go generic as well um: switch to generic-y um: clean Kconfig up a bit um: a couple of missing dependencies... um: kill useless argument of free_chan() and free_one_chan() um: unify ptrace_user.h um: unify KSTK_... um: fix gcov build breakage ...
2011-11-02um: fix ubd cow sizeRichard Weinberger1-1/+30
ubd_file_size() cannot use ubd_dev->cow.file because at this time ubd_dev->cow.file is not initialized. Therefore, ubd_file_size() will always report a wrong disk size when COW files are used. Reading from /dev/ubd* would crash the kernel. We have to read the correct disk size from the COW file's backing file. Signed-off-by: Richard Weinberger <[email protected]> CC: [email protected]
2011-11-02um: kill useless argument of free_chan() and free_one_chan()Al Viro1-5/+5
delay_free_irq is always 0 for those... Signed-off-by: Al Viro <[email protected]> Signed-off-by: Richard Weinberger <[email protected]>
2011-11-02um: take ubd_user.h to its users...Al Viro1-0/+16
Signed-off-by: Al Viro <[email protected]> Signed-off-by: Richard Weinberger <[email protected]>
2011-11-02um: take mconsole*.h to arch/um/driversAl Viro2-0/+150
Signed-off-by: Al Viro <[email protected]> Signed-off-by: Richard Weinberger <[email protected]>
2011-11-02um: take chan_*.h and line.h to arch/um/driversAl Viro7-6/+215
Signed-off-by: Al Viro <[email protected]> Signed-off-by: Richard Weinberger <[email protected]>
2011-11-02um: take register_winch_irq() into the caller of is_skas_winch()Al Viro1-1/+6
Signed-off-by: Al Viro <[email protected]> Signed-off-by: Richard Weinberger <[email protected]>
2011-11-02um: kill shared/mem_kern.hAl Viro1-1/+0
... nothing declared there exists Signed-off-by: Al Viro <[email protected]> Signed-off-by: Richard Weinberger <[email protected]>
2011-11-02um: don't include kern.h unless it's neededAl Viro2-2/+0
Signed-off-by: Al Viro <[email protected]> Signed-off-by: Richard Weinberger <[email protected]>
2011-11-02um: -include user.h for USER_OBJ, trim includesAl Viro17-30/+0
Signed-off-by: Al Viro <[email protected]> Signed-off-by: Richard Weinberger <[email protected]>
2011-09-22Merge branch 'master' of github.com:davem330/netDavid S. Miller2-25/+37
Conflicts: MAINTAINERS drivers/net/Kconfig drivers/net/ethernet/broadcom/bnx2x/bnx2x_link.c drivers/net/ethernet/broadcom/tg3.c drivers/net/wireless/iwlwifi/iwl-pci.c drivers/net/wireless/iwlwifi/iwl-trans-tx-pcie.c drivers/net/wireless/rt2x00/rt2800usb.c drivers/net/wireless/wl12xx/main.c
2011-09-14um: fix free_winch() messAl Viro1-14/+24
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 <[email protected]> Signed-off-by: Richard Weinberger <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2011-09-14um: winch_interrupt() can happen inside of free_winch()Al Viro1-2/+4
... 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 <[email protected]> Signed-off-by: Richard Weinberger <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2011-09-14um: fix oopsable race in line_close()Al Viro1-13/+12
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 <[email protected]> Signed-off-by: Richard Weinberger <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2011-09-14um: drivers/xterm.c: fix a file descriptor leakJonathan Neuschäfer1-0/+1
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 <[email protected]> Signed-off-by: Richard Weinberger <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2011-08-17net: remove use of ndo_set_multicast_list in driversJiri Pirko1-1/+1
replace it by ndo_set_rx_mode Signed-off-by: Jiri Pirko <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2011-07-25um: remove dead codeRichard Weinberger2-4/+2
GCC 4.6's -Wunused-but-set-variable found some dead code. Signed-off-by: Richard Weinberger <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2011-07-25um: adjust size of pid_bufRichard Weinberger1-1/+1
Linux can have pids up to 4*1024*1024. To handle such huge numbers pid_buf needs to be larger. Reported-by: Geert Uytterhoeven <[email protected]> Signed-off-by: Richard Weinberger <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2011-07-25uml: drivers/slip_user.c memory leak fixVitaliy Ivanov1-2/+1
Do not free memory when you failed to allocate it. Signed-off-by: Vitaliy Ivanov <[email protected]> Signed-off-by: Richard Weinberger <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2011-07-25uml: cow_user.c warning correctionsVitaliy Ivanov1-1/+5
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 [[email protected]: happens only with -D_FORTIFY_SOURCE=2] Signed-off-by: Vitaliy Ivanov <[email protected]> Signed-off-by: Richard Weinberger <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
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