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linux/drivers/char
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Matt Mackall cda796a3d5 random: don't try to look at entropy_count outside the lock 
As a non-atomic value, it's only safe to look at entropy_count when the
pool lock is held, so we move the BUG_ON inside the lock for correctness.

Also remove the spurious comment.  It's ok for entropy_count to
temporarily exceed POOLBITS so long as it's left in a consistent state
when the lock is released.

This is a more correct, simple, and idiomatic fix for the bug in
8b76f46a2d.  I've left the reorderings introduced by that patch in place
as they're harmless, even though they don't properly deal with potential
atomicity issues.

Signed-off-by: Matt Mackall <mpm@selenic.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-01-06 15:59:30 -08:00
..
agp agp/intel: Fix broken ® symbol in device name. 2008-12-29 10:06:20 +10:00
hw_random Tidy up addresses in random drivers 2008-10-27 08:39:52 -07:00
ip2 device create: char: convert device_create_drvdata to device_create 2008-10-16 09:24:42 -07:00
ipmi Fix platform drivers that crash on suspend/resume 2008-11-12 17:17:16 -08:00
mwave mwave: ioctl BKL pushdown 2008-07-25 10:53:43 -07:00
pcmcia synclink_cs: Convert to tty_port 2009-01-02 10:19:42 -08:00
rio rio: Kill off ckmalloc 2009-01-02 10:19:38 -08:00
tpm tpm: don't export static functions 2008-10-20 08:50:24 -07:00
xilinx_hwicap xilinx_hwicap: remove improper wording in license statement 2008-12-17 11:23:07 -08:00
.gitignore
amiserial.c tty: Remove some pointless casts 2009-01-02 10:19:40 -08:00
apm-emulation.c APM emulation: Notify about all suspend events, not just APM invoked ones (v2) 2008-07-16 23:27:02 +02:00
applicom.c applicom.c: fix apparently-broken code in do_ac_read() 2008-10-16 11:21:47 -07:00
applicom.h
bfin-otp.c Blackfin char driver for Blackfin on-chip OTP memory (v3) 2008-04-25 08:04:56 +08:00
briq_panel.c briq_panel: BKL pushdown 2008-06-20 14:05:55 -06:00
bsr.c powerpc/BSR: Support multiple OF-node description of BSR 2008-12-03 21:03:27 +11:00
cd1865.h
ChangeLog
consolemap.c consolemap: indentation & braces disagree - reindent 2009-01-06 15:59:30 -08:00
cp437.uni unicode table for cp437 2008-12-13 11:25:49 -08:00
cs5535_gpio.c Add a bunch of cycle_kernel_lock() calls 2008-06-20 14:05:53 -06:00
cyclades.c drivers/char/cyclades.c: cy_pci_probe: fix error path 2009-01-02 10:19:43 -08:00
defkeymap.c_shipped Fix default compose table initialization 2008-03-03 14:53:16 -08:00
defkeymap.map
digi1.h
digiFep1.h
digiPCI.h
ds1302.c rtc: use bcd2bin/bin2bcd 2008-10-20 08:52:41 -07:00
ds1620.c [ARM] netwinder: clean up GPIO naming 2008-12-13 09:12:07 +00:00
dsp56k.c device create: char: convert device_create_drvdata to device_create 2008-10-16 09:24:42 -07:00
dtlk.c Add a bunch of cycle_kernel_lock() calls 2008-06-20 14:05:53 -06:00
efirtc.c drivers/char/efirtc.c: removed duplicated #include 2008-08-04 16:59:56 -07:00
epca.c tty: Redo the rocket driver locking 2009-01-02 10:19:41 -08:00
epca.h epca: use tty_port 2008-07-20 17:12:36 -07:00
epcaconfig.h
esp.c tty_port: Add a port level carrier detect operation 2009-01-02 10:19:38 -08:00
generic_nvram.c driver/char/generic_nvram: fix banner 2008-06-12 18:05:41 -07:00
generic_serial.c tty: Remove some pointless casts 2009-01-02 10:19:40 -08:00
genrtc.c genrtc: BKL pushdown 2008-06-20 14:05:57 -06:00
hangcheck-timer.c drivers/char/: Spelling fixes 2008-02-03 17:11:42 +02:00
hpet.c x86: correct link to HPET timer specification 2008-11-24 10:05:12 +01:00
hvc_beat.c [POWERPC] hvcbeat: Fix buffer manipulation 2008-04-17 07:46:10 +10:00
hvc_console.c pty: simplify resize 2009-01-02 10:19:36 -08:00
hvc_console.h powerpc: Make open count variables signed in hvcs/hvsi/hvc_console 2008-12-03 21:04:13 +11:00
hvc_irq.c hvc_console: Add a hangup notifier for backends 2008-10-22 10:59:54 +11:00
hvc_iseries.c drivers/hvc: Add missing of_node_put 2008-12-03 21:04:09 +11:00
hvc_iucv.c [S390] s390/hvc_console: z/VM IUCV hypervisor console support 2008-12-25 13:39:03 +01:00
hvc_rtas.c [POWERPC] hvc_rtas_init() must be __init 2008-02-14 22:11:02 +11:00
hvc_udbg.c powerpc: udbg-based backend for hvc_console 2008-11-19 16:04:25 +11:00
hvc_vio.c drivers/hvc: Add missing of_node_put 2008-12-03 21:04:09 +11:00
hvc_xen.c hvc_console: Add a hangup notifier for backends 2008-10-22 10:59:54 +11:00
hvcs.c powerpc: Make open count variables signed in hvcs/hvsi/hvc_console 2008-12-03 21:04:13 +11:00
hvsi.c tty: Remove some pointless casts 2009-01-02 10:19:40 -08:00
i8k.c i8k: Add Dell Vostro systems 2009-01-02 10:28:32 -08:00
isicom.c tty: Introduce some close helpers for ports 2009-01-02 10:19:40 -08:00
istallion.c tty: Introduce some close helpers for ports 2009-01-02 10:19:40 -08:00
Kconfig genrtc: disable genrtc on Blackfin systems 2009-01-06 15:59:23 -08:00
keyboard.c Input: keyboard - fix potential out of bound access to key_map 2008-10-08 23:45:36 -04:00
lp.c device create: char: convert device_create_drvdata to device_create 2008-10-16 09:24:42 -07:00
Makefile Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc 2008-12-28 16:54:33 -08:00
mbcs.c mbcs: cdev lock_kernel() pushdown 2008-06-20 14:05:48 -06:00
mbcs.h MBCS: convert dmareadlock to mutex 2008-02-07 08:42:25 -08:00
mem.c mm: make vread() and vwrite() declaration 2009-01-06 15:59:05 -08:00
misc.c device create: char: convert device_create_drvdata to device_create 2008-10-16 09:24:42 -07:00
mmtimer.c mmtimer: Push BKL down into the ioctl handler 2008-07-17 11:34:49 -07:00
moxa.c tty_port: Add a port level carrier detect operation 2009-01-02 10:19:38 -08:00
moxa.h Char: moxa, cleanup rx/tx 2008-04-30 08:29:43 -07:00
mspec.c mspec: convert nopfn to fault 2008-07-24 10:47:14 -07:00
mxser.c tty: Introduce some close helpers for ports 2009-01-02 10:19:40 -08:00
mxser.h mxser: convert large macros to functions 2008-04-30 08:29:49 -07:00
n_hdlc.c tty: some ICANON magic is in the wrong places 2008-10-13 09:51:44 -07:00
n_r3964.c tty: Remove some pointless casts 2009-01-02 10:19:40 -08:00
n_tty.c tty: N_TTY SIGIO only works for read 2009-01-02 10:19:40 -08:00
nozomi.c tty: kref nozomi 2009-01-02 10:19:40 -08:00
nsc_gpio.c
nvram.c [PATCH] nvram - convert PRINT_PROC to seq_file 2008-11-11 09:56:00 +00:00
nwbutton.c
nwbutton.h
nwflash.c [ARM] netwinder: clean up GPIO naming 2008-12-13 09:12:07 +00:00
pc8736x_gpio.c pc8736x_gpio: add support for PC87365 chips 2008-10-20 08:52:40 -07:00
ppdev.c device create: char: convert device_create_drvdata to device_create 2008-10-16 09:24:42 -07:00
ps3flash.c
pty.c tty: PTYs set TTY_DO_WRITE_WAKEUP when they don't need to 2009-01-02 10:19:40 -08:00
random.c random: don't try to look at entropy_count outside the lock 2009-01-06 15:59:30 -08:00
raw.c [PATCH] kill the rest of struct file propagation in block ioctls 2008-10-21 07:49:14 -04:00
riscom8_reg.h
riscom8.c tty: Remove some pointless casts 2009-01-02 10:19:40 -08:00
riscom8.h tty: add more tty_port fields 2008-07-20 17:12:38 -07:00
rocket_int.h tty: rocketport uses different port flags to everyone else 2009-01-02 10:19:39 -08:00
rocket.c tty: use port methods for the rocket driver 2009-01-02 10:19:42 -08:00
rocket.h tty: rocketport uses different port flags to everyone else 2009-01-02 10:19:39 -08:00
rtc.c saner FASYNC handling on file close 2008-11-01 09:49:46 -07:00
scc.h
scx200_gpio.c Add a bunch of cycle_kernel_lock() calls 2008-06-20 14:05:53 -06:00
selection.c tty: Remove some pointless casts 2009-01-02 10:19:40 -08:00
ser_a2232.c tty: Remove some pointless casts 2009-01-02 10:19:40 -08:00
ser_a2232.h
ser_a2232fw.ax
ser_a2232fw.h
serial167.c tty: Remove some pointless casts 2009-01-02 10:19:40 -08:00
snsc_event.c byteorder: don't directly include linux/byteorder/generic.h 2008-05-16 12:01:45 -07:00
snsc.c device create: char: convert device_create_drvdata to device_create 2008-10-16 09:24:42 -07:00
snsc.h Convert asm/semaphore.h users to linux/semaphore.h 2008-04-18 22:22:54 -04:00
sonypi.c Merge branch 'misc' into release 2008-11-11 21:14:11 -05:00
specialix_io8.h tty: add more tty_port fields 2008-07-20 17:12:38 -07:00
specialix.c tty: Remove some pointless casts 2009-01-02 10:19:40 -08:00
stallion.c tty: Introduce some close helpers for ports 2009-01-02 10:19:40 -08:00
sx.c tty: Remove some pointless casts 2009-01-02 10:19:40 -08:00
sx.h Char: char/serial, remove SERIAL_TYPE_NORMAL redefines 2008-02-07 08:42:33 -08:00
sxboards.h
sxwindow.h
synclink_gt.c tty: Introduce some close helpers for ports 2009-01-02 10:19:40 -08:00
synclink.c tty: Remove some pointless casts 2009-01-02 10:19:40 -08:00
synclinkmp.c tty: Remove some pointless casts 2009-01-02 10:19:40 -08:00
sysrq.c sysrq: more explicit, less terse help messages 2009-01-06 15:59:14 -08:00
tb0219.c Add a bunch of cycle_kernel_lock() calls 2008-06-20 14:05:53 -06:00
tlclk.c tlckl: BKL pushdown 2008-06-20 14:05:51 -06:00
toshiba.c toshiba: use ioremap_cached 2008-04-30 23:15:34 +02:00
tty_audit.c Audit: Log TIOCSTI 2008-12-09 20:32:06 +11:00
tty_buffer.c tty: split the buffering from tty_io 2008-10-13 09:51:40 -07:00
tty_io.c pty: simplify resize 2009-01-02 10:19:36 -08:00
tty_ioctl.c tty: some ICANON magic is in the wrong places 2008-10-13 09:51:44 -07:00
tty_ldisc.c tty: Fix PPP hang under load 2009-01-02 10:19:38 -08:00
tty_port.c tty: use port methods for the rocket driver 2009-01-02 10:19:42 -08:00
vc_screen.c device create: char: convert device_create_drvdata to device_create 2008-10-16 09:24:42 -07:00
viotape.c device create: char: convert device_create_drvdata to device_create 2008-10-16 09:24:42 -07:00
virtio_console.c virtio_console: support console resizing 2008-12-30 09:26:10 +10:30
vme_scc.c tty: Remove some pointless casts 2009-01-02 10:19:40 -08:00
vr41xx_giu.c drivers/char: use nr_irqs 2008-10-16 16:52:05 +02:00
vt_ioctl.c tty: Remove some pointless casts 2009-01-02 10:19:40 -08:00
vt.c pty: simplify resize 2009-01-02 10:19:36 -08:00