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authorAl Viro <viro@ftp.linux.org.uk>2011-08-18 15:13:00 -0400
committerRichard Weinberger <richard@nod.at>2011-11-02 09:15:29 -0400
commitd805a78603bb489d71a12466e8f29c5e9837e50a (patch)
tree12d7273a3cbd4f28e833232e9d884b6c3b7f904e /arch/um/Kconfig.char
parentbad3118fcdeb4b7b5bf18cb40b2548cf891646b2 (diff)
um: clean Kconfig up a bit
* kill duplicates with drivers/char/Kconfig * take watchdog one into drivers/watchdog/Kconfig * take mmapper to arch/um/Kconfig.um * rename Kconfig.char menu to "UML Character Devices" Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Richard Weinberger <richard@nod.at>
Diffstat (limited to 'arch/um/Kconfig.char')
-rw-r--r--arch/um/Kconfig.char114
1 files changed, 1 insertions, 113 deletions
diff --git a/arch/um/Kconfig.char b/arch/um/Kconfig.char
index 70dabd1e0652..b9d7c4276682 100644
--- a/arch/um/Kconfig.char
+++ b/arch/um/Kconfig.char
@@ -1,5 +1,4 @@
1 1menu "UML Character Devices"
2menu "Character Devices"
3 2
4config STDERR_CONSOLE 3config STDERR_CONSOLE
5 bool "stderr console" 4 bool "stderr console"
@@ -105,92 +104,6 @@ config SSL_CHAN
105 this if you expect the UML that you build to be run in environments 104 this if you expect the UML that you build to be run in environments
106 which don't have a set of /dev/pty* devices. 105 which don't have a set of /dev/pty* devices.
107 106
108config UNIX98_PTYS
109 bool "Unix98 PTY support"
110 help
111 A pseudo terminal (PTY) is a software device consisting of two
112 halves: a master and a slave. The slave device behaves identical to
113 a physical terminal; the master device is used by a process to
114 read data from and write data to the slave, thereby emulating a
115 terminal. Typical programs for the master side are telnet servers
116 and xterms.
117
118 Linux has traditionally used the BSD-like names /dev/ptyxx for
119 masters and /dev/ttyxx for slaves of pseudo terminals. This scheme
120 has a number of problems. The GNU C library glibc 2.1 and later,
121 however, supports the Unix98 naming standard: in order to acquire a
122 pseudo terminal, a process opens /dev/ptmx; the number of the pseudo
123 terminal is then made available to the process and the pseudo
124 terminal slave can be accessed as /dev/pts/<number>. What was
125 traditionally /dev/ttyp2 will then be /dev/pts/2, for example.
126
127 All modern Linux systems use the Unix98 ptys. Say Y unless
128 you're on an embedded system and want to conserve memory.
129
130config LEGACY_PTYS
131 bool "Legacy (BSD) PTY support"
132 default y
133 help
134 A pseudo terminal (PTY) is a software device consisting of two
135 halves: a master and a slave. The slave device behaves identical to
136 a physical terminal; the master device is used by a process to
137 read data from and write data to the slave, thereby emulating a
138 terminal. Typical programs for the master side are telnet servers
139 and xterms.
140
141 Linux has traditionally used the BSD-like names /dev/ptyxx
142 for masters and /dev/ttyxx for slaves of pseudo
143 terminals. This scheme has a number of problems, including
144 security. This option enables these legacy devices; on most
145 systems, it is safe to say N.
146
147config RAW_DRIVER
148 tristate "RAW driver (/dev/raw/rawN)"
149 depends on BLOCK
150 help
151 The raw driver permits block devices to be bound to /dev/raw/rawN.
152 Once bound, I/O against /dev/raw/rawN uses efficient zero-copy I/O.
153 See the raw(8) manpage for more details.
154
155 Applications should preferably open the device (eg /dev/hda1)
156 with the O_DIRECT flag.
157
158config MAX_RAW_DEVS
159 int "Maximum number of RAW devices to support (1-8192)"
160 depends on RAW_DRIVER
161 default "256"
162 help
163 The maximum number of RAW devices that are supported.
164 Default is 256. Increase this number in case you need lots of
165 raw devices.
166
167config LEGACY_PTY_COUNT
168 int "Maximum number of legacy PTY in use"
169 depends on LEGACY_PTYS
170 default "256"
171 help
172 The maximum number of legacy PTYs that can be used at any one time.
173 The default is 256, and should be more than enough. Embedded
174 systems may want to reduce this to save memory.
175
176 When not in use, each legacy PTY occupies 12 bytes on 32-bit
177 architectures and 24 bytes on 64-bit architectures.
178
179config WATCHDOG
180 bool "Watchdog Timer Support"
181
182config WATCHDOG_NOWAYOUT
183 bool "Disable watchdog shutdown on close"
184 depends on WATCHDOG
185
186config SOFT_WATCHDOG
187 tristate "Software Watchdog"
188 depends on WATCHDOG
189
190config UML_WATCHDOG
191 tristate "UML watchdog"
192 depends on WATCHDOG
193
194config UML_SOUND 107config UML_SOUND
195 tristate "Sound support" 108 tristate "Sound support"
196 help 109 help
@@ -211,29 +124,4 @@ config HOSTAUDIO
211 tristate 124 tristate
212 default UML_SOUND 125 default UML_SOUND
213 126
214#It is selected elsewhere, so kconfig would warn without this.
215config HW_RANDOM
216 tristate
217 default n
218
219config UML_RANDOM
220 tristate "Hardware random number generator"
221 help
222 This option enables UML's "hardware" random number generator. It
223 attaches itself to the host's /dev/random, supplying as much entropy
224 as the host has, rather than the small amount the UML gets from its
225 own drivers. It registers itself as a standard hardware random number
226 generator, major 10, minor 183, and the canonical device name is
227 /dev/hwrng.
228 The way to make use of this is to install the rng-tools package
229 (check your distro, or download from
230 http://sourceforge.net/projects/gkernel/). rngd periodically reads
231 /dev/hwrng and injects the entropy into /dev/random.
232
233config MMAPPER
234 tristate "iomem emulation driver"
235 help
236 This driver allows a host file to be used as emulated IO memory inside
237 UML.
238
239endmenu 127endmenu