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tty: Make driver-side flip buffers lockless
2013-07-23 Peter Hurleytty: Make driver-side flip buffers lockless
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-07-23 Peter Hurleytty: Track flip buffer memory limit atomically
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-07-23 Peter Hurleytty: Simplify flip buffer list with 0-sized sentinel
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-07-23 Peter Hurleytty: Use lockless flip buffer free list
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-07-23 Peter Hurleytty: Use generic names for flip buffer list cursors
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-07-23 Peter Hurleytty: Merge tty_buffer_find() into tty_buffer_alloc()
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-07-23 Peter Hurleytty: Factor flip buffer initialization into helper...
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-07-23 Peter Hurleytty: Fix flip buffer free list
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-07-23 Peter Hurleytty: Compute flip buffer ptrs
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-07-23 Peter Hurleyn_tty: Queue buffer work on any available cpu
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-07-23 Peter Hurleyn_tty: Special case pty flow control
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-07-23 Peter Hurleyn_tty: Move n_tty_write_wakeup() to avoid forward declaration
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-07-23 Peter Hurleyn_tty: Factor throttle/unthrottle into helper functions
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-07-23 Peter Hurleyn_tty: Move chars_in_buffer() to factor throttle/unthrottle
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-07-23 Peter Hurleytty: Only guarantee termios read safety for throttle...
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-07-23 Peter Hurleyn_tty: Separate buffer indices to prevent cache-line...
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-07-23 Peter Hurleyn_tty: Don't wait for buffer work in read() loop
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-07-23 Peter Hurleyn_tty: Fix type mismatches in receive_buf raw copy
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-07-23 Peter Hurleyn_tty: Reset lnext if canonical mode changes
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-07-23 Peter Hurleyn_tty: Make N_TTY ldisc receive path lockless
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-07-23 Peter Hurleyn_tty: Replace canon_data with index comparison
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-07-23 Peter Hurleyn_tty: Access termios values safely
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-07-23 Peter Hurleytty: Convert termios_mutex to termios_rwsem
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-07-23 Peter Hurleyn_tty: Remove read_cnt
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-07-23 Peter Hurleyn_tty: Don't wrap input buffer indices at buffer size
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-07-23 Peter Hurleyn_tty: Get read_cnt through accessor
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-07-23 Peter Hurleytty: Deprecate ldisc .chars_in_buffer() method
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-07-23 Peter Hurleyn_tty: Split n_tty_chars_in_buffer() for reader-only...
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-07-23 Peter Hurleyn_tty: Line copy to user buffer in canonical mode
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-07-23 Peter Hurleyn_tty: Factor canonical mode copy from n_tty_read()
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-07-23 Peter Hurleytty: Make ldisc input flow control concurrency-friendly
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-07-23 Peter Hurleytty: Simplify tty buffer/ldisc interface with helper...
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-07-23 Peter Hurleytty: Don't change receive_room for ioctl(TIOCSETD)
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-07-23 Peter Hurleytty: Clarify multiple-references comment in TIOCSETD...
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-07-23 Peter Hurleytty: Fix hangup race with TIOCSETD ioctl
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-07-23 Peter Hurleytty: Clarify ldisc variable
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-07-23 Peter Hurleytty: Replace ldisc locking with ldisc_sem
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-07-23 Peter Hurleytty: Add lock/unlock ldisc pair functions
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-07-23 Peter Hurleytty: Fix tty_ldisc_lock name collision
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-06-17 Peter Hurleytty: Reset itty for other pty
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-06-17 Peter Hurleyn_tty: Buffer work should not reschedule itself
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-06-17 Peter Hurleyn_tty: Fix unsafe update of available buffer space
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-06-17 Peter Hurleyn_tty: Untangle read completion variables
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-06-17 Peter Hurleyn_tty: Encapsulate minimum_to_wake within N_TTY
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-06-17 Peter Hurleytty: Fix transient pty write() EIO
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-05-20 Peter Hurleytty: Add timed, writer-prioritized rw semaphore
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-05-20 Peter Hurleytty/vt: Fix vc_deallocate() lock order
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-05-20 Peter Hurleytty: Remove TTY_HW_COOK_IN/OUT
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-05-01 Peter Hurleyipc: refactor msg list search into separate function
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-05-01 Peter Hurleyipc: simplify msg list search
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-05-01 Peter Hurleyipc: implement MSG_COPY as a new receive mode
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-05-01 Peter Hurleyipc: remove msg handling from queue scan
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-05-01 Peter Hurleyipc: set EFAULT as default error in load_msg()
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-05-01 Peter Hurleyipc: tighten msg copy loops
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-05-01 Peter Hurleyipc: separate msg allocation from userspace copy
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-05-01 Peter Hurleyipc: clamp with min()
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-04-30 Peter Hurleyfirewire: ohci: dump_stack() for PHY regs read/write...
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-04-30 Peter Hurleyfirewire: ohci: Improve bus reset error messages
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-04-30 Peter Hurleyfirewire: ohci: Alias dev_* log functions
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-04-30 Peter Hurleyfirewire: ohci: Fix 'failed to read phy reg' on FW643...
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-04-28 Peter Hurleyfirewire: ohci: Check LPS before register access on...
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-04-28 Peter Hurleyfirewire: ohci: Fix double free_irq()
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-04-15 Peter Hurleytty: Fix unsafe bit ops in tty_throttle_safe/unthrottle_safe
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-04-10 Peter Hurleytty: Fix race condition if flushing tty flip buffers
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-03-18 Peter Hurleytty: Fix recursive deadlock in tty_perform_flush()
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-03-18 Peter Hurleytty: Remove redundant tty_wait_until_sent()
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-03-18 Peter Hurleytty: Locate get/put ldisc functions together
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-03-18 Peter Hurleytty: Fold one-line assign function into callers
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-03-18 Peter Hurleytty: Document unsafe ldisc reference acquire
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-03-18 Peter Hurleytty: Separate release semantics of ldisc reference
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-03-18 Peter Hurleytty: Don't protect atomic operation with mutex
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-03-18 Peter Hurleytty: Add ldisc hangup debug messages
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-03-18 Peter Hurleytty: Bracket ldisc release with TTY_DEBUG_HANGUP messages
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-03-18 Peter Hurleytty: Fix 'deferred reopen' ldisc comment
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-03-18 Peter Hurleytty: Make core responsible for synchronizing its work
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-03-18 Peter Hurleytty: Complete ownership transfer of flip buffers
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-03-18 Peter Hurleytty: Don't reenable already enabled ldisc
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-03-18 Peter Hurleyn_tty: Fully initialize ldisc before restarting buffer...
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-03-18 Peter Hurleyn_tty: Correct unthrottle-with-buffer-flush comments
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-03-18 Peter Hurleytty: Wait for SAK work before waiting for hangup work
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-03-18 Peter Hurleytty: Halt both ldiscs concurrently
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-03-18 Peter Hurleytty: Strengthen no-subsequent-use guarantee of tty_ldisc_halt()
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-03-18 Peter Hurleytty: Relocate tty_ldisc_halt() to avoid forward declaration
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-03-18 Peter Hurleytty: Fix ldisc halt sequence on hangup
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-03-18 Peter Hurleytty: Remove unnecessary re-test of ldisc ref count
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-03-18 Peter Hurleytty: Refactor wait for ldisc refs out of tty_ldisc_hangup()
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-03-18 Peter Hurleyn_tty: Don't flush buffer when closing ldisc
 * Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-03-18 Peter Hurleyn_tty: Factor packet mode status change for reuse
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-03-18 Peter Hurleytty: Add diagnostic for halted line discipline
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-03-18 Peter Hurleytty: Fix checkpatch errors in tty_ldisc.h
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-03-18 Peter Hurleyn_tty: Lock access to tty->pgrp for POSIX job control
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-03-18 Peter Hurleyn_tty: Fix unsafe driver-side signals
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-03-18 Peter Hurleyn_tty: Fix stuck throttled driver
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-03-18 Peter Hurleytty: Add safe tty throttle/unthrottle functions
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-03-18 Peter Hurleyn_tty: Inline check_unthrottle() at lone call site
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-03-15 Peter Hurleytty: Signal SIGHUP before hanging up ldisc
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-03-15 Peter Hurleytty: Signal foreground group processes in hangup
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-03-15 Peter Hurleytty: Use spin_lock() inside existing critical region
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-03-15 Peter Hurleytty: Fix spinlock flavor in non-atomic __tty_hangup()
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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2013-03-15 Peter Hurleytty: Refactor session leader SIGHUP from __tty_hangup()
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
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