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  1. 21 9月, 2009 10 次提交
  3. 20 9月, 2009 2 次提交
  5. 19 9月, 2009 23 次提交
  7. 18 9月, 2009 5 次提交
    • L
      pty_write: don't do a tty_wakeup() when the buffers are full · 202c4675
      由 Linus Torvalds 提交于 
      Commit ac89a917 ("pty: don't limit the writes to 'pty_space()' inside
'pty_write()'") removed the pty_space() checking, in order to let the
regular tty buffer code limit the buffering itself.

That was all good, but as a subtle side effect it meant that we'd be
doing a tty_wakeup() even in the case where the buffers were all filled
up, and didn't actually make any progress on the write.

Which sounds innocuous, but it interacts very badly with the ppp_async
code, which has an infinite loop in ppp_async_push() that tries to push
out data to the tty.  When we call tty_wakeup(), that loop ends up
thinking that progress was made (see the subtle interactions between
XMIT_WAKEUP and 'tty_stuffed' for details).  End result: one unhappy ppp
user.

Fixed by noticing when tty_insert_flip_string() didn't actually do
anything, and then not doing any more processing (including, very much
not calling tty_wakeup()).
Bisected-and-tested-by: NPeter Volkov <pva@gentoo.org>
Cc: stable@kernel.org (2.6.31)
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      202c4675
    • J
      x86: SGI UV: Map MMIO-High memory range · daf7b9c9
      由 Jack Steiner 提交于 
      UV depends on the MMRHI space being identity mapped. The patch:

	x86: Make 64-bit efi_ioremap use ioremap on MMIO regions

changed this to make efi regions at a different address using
ioremap. Add the identity mapping to uv_system_init.

( Note this code was previously present but was deleted when BIOS
  added the ranges to the EFI map - previous efi code identify
  mapped the ranges. )
Signed-off-by: NJack Steiner <steiner@sgi.com>
LKML-Reference: <20090909154339.GA7946@sgi.com>
Signed-off-by: NIngo Molnar <mingo@elte.hu>
      daf7b9c9
    • J
      x86: SGI UV: Add volatile semantics to macros that access chipset registers · 8dc579e8
      由 Jack Steiner 提交于 
      Add volatile-semantics to the SGI UV read/write macros that are
used to access chipset memory mapped registers. No direct
references to volatile are made. Instead the readq/writeq macros
are used.
Signed-off-by: NJack Steiner <steiner@sgi.com>
Cc: linux-mm@kvack.org
Cc: dwalker@fifo99.com
Cc: cfriesen@nortel.com
LKML-Reference: <20090910143149.GA14273@sgi.com>
Signed-off-by: NIngo Molnar <mingo@elte.hu>
      8dc579e8
    • J
      x86: SGI UV: Fix IPI macros · d2374aec
      由 Jack Steiner 提交于 
      The UV BIOS has changed the way interrupt remapping is being done.
This affects the id used for sending IPIs. The upper id bits no
longer need to be masked off.
Signed-off-by: NJack Steiner <steiner@sgi.com>
Cc: <stable@kernel.org>
LKML-Reference: <20090909154104.GA25083@sgi.com>
Signed-off-by: NIngo Molnar <mingo@elte.hu>
      d2374aec
    • D
      x86: apic: Convert BUG() to BUG_ON() · c2777f98
      由 Daniel Walker 提交于 
      This was done using Coccinelle's BUG_ON semantic patch.
Signed-off-by: NDaniel Walker <dwalker@fifo99.com>
Cc: Julia Lawall <julia@diku.dk>
LKML-Reference: <1252777220-30796-1-git-send-email-dwalker@fifo99.com>
Signed-off-by: NIngo Molnar <mingo@elte.hu>
      c2777f98