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mem.4: Minor wording and formatting fixes 

Signed-off-by: Michael Kerrisk <mtk.manpages@gmail.com>
This commit is contained in:
Michael Kerrisk 2015-05-10 12:50:17 +02:00
parent de347a67a8
commit 2174e8e353
1 changed files with 8 additions and 8 deletions
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16
man4/mem.4
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@ -27,20 +27,20 @@
.SH NAME .SH NAME
mem, kmem, port \- system memory, kernel memory and system ports mem, kmem, port \- system memory, kernel memory and system ports
.SH DESCRIPTION .SH DESCRIPTION
.B mem .IR /dev/mem
is a character device file is a character device file
that is an image of the main memory of the computer. that is an image of the main memory of the computer.
It may be used, for example, to examine (and even patch) the system. It may be used, for example, to examine (and even patch) the system.
.LP .LP
Byte addresses in Byte addresses in
.B mem .IR /dev/mem
are interpreted as physical memory addresses. are interpreted as physical memory addresses.
References to nonexistent locations cause errors to be returned. References to nonexistent locations cause errors to be returned.
.LP .LP
Examining and patching is likely to lead to unexpected results Examining and patching is likely to lead to unexpected results
when read-only or write-only bits are present. when read-only or write-only bits are present.
.LP .LP
Since 2.6.26, and depending on the architecture, the Since Linux 2.6.26, and depending on the architecture, the
.B CONFIG_STRICT_DEVMEM .B CONFIG_STRICT_DEVMEM
kernel configuration option limits the areas kernel configuration option limits the areas
which can be accessed through this file. which can be accessed through this file.
@ -56,12 +56,12 @@ chown root:kmem /dev/mem
.RE .RE
.LP .LP
The file The file
.B kmem .IR /dev/kmem
is the same as is the same as
.BR mem , .IR /dev/mem ,
except that the kernel virtual memory except that the kernel virtual memory
rather than physical memory is accessed. rather than physical memory is accessed.
Since 2.6.26, this file is available only if the Since Linux 2.6.26, this file is available only if the
.B CONFIG_DEVKMEM .B CONFIG_DEVKMEM
kernel configuration option is enabled. kernel configuration option is enabled.
.LP .LP
@ -73,9 +73,9 @@ mknod \-m 640 /dev/kmem c 1 2
chown root:kmem /dev/kmem chown root:kmem /dev/kmem
.RE .RE
.LP .LP
.B port .IR /dev/port
is similar to is similar to
.BR mem , .IR /dev/mem ,
but the I/O ports are accessed. but the I/O ports are accessed.
.LP .LP
It is typically created by: It is typically created by: