80ef517b01
Move .dma.text section alignment out of section description, otherwise
zeros used to align the section are included in the section itself (and
section is not really aligned by itself).
$ objdump -h arch/s390/boot/compressed/vmlinux
5 .dma.text 00001e38 000000000001b1c8 000000000001b1c8 0001c1c8 2**2
CONTENTS, ALLOC, LOAD, READONLY, CODE
6 .dma.ex_table 00000018 000000000001d000 000000000001d000 0001e000 2**2
CONTENTS, ALLOC, LOAD, READONLY, DATA
7 .dma.data 00000240 000000000001d080 000000000001d080 0001e080 2**7
CONTENTS, ALLOC, LOAD, DATA
$ cat /sys/kernel/debug/memblock/reserved
0: 0x0000000000000000..0x0000000000011fff
1: 0x000000000001b1c8..0x000000000001d2bf
...
Also add alignment before _edma linker symbol definition, so that entire
.dma* region is rounded up to page boundaries.
$ objdump -h arch/s390/boot/compressed/vmlinux
5 .dma.text 00001000 000000000001c000 000000000001c000 0001d000 2**2
CONTENTS, ALLOC, LOAD, READONLY, CODE
6 .dma.ex_table 00000018 000000000001d000 000000000001d000 0001e000 2**2
CONTENTS, ALLOC, LOAD, READONLY, DATA
7 .dma.data 00000240 000000000001d080 000000000001d080 0001e080 2**7
CONTENTS, ALLOC, LOAD, DATA
$ cat /sys/kernel/debug/memblock/reserved
0: 0x0000000000000000..0x0000000000011fff
1: 0x000000000001c000..0x000000000001dfff
...
$ cat /sys/kernel/debug/kernel_page_tables
---[ Identity Mapping ]---
0x0000000000000000-0x000000000001c000 112K PTE RW NX
0x000000000001c000-0x000000000001d000 4K PTE RO X
0x000000000001d000-0x0000000000100000 908K PTE RW NX
...
Reviewed-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.