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Filename Latest commit message Latest commit date
Ingo Molnar 4270fd8b4c x86/boot/e820: Move the memblock_find_dma_reserve() function and rename it to memblock_set_dma_reserve() 
We introduced memblock_find_dma_reserve() in this commit:

   6f2a75369e x86, memblock: Use memblock_memory_size()/memblock_free_memory_size() to get correct dma_reserve

But there's several problems with it:

 - The changelog is full of typos and is incomprehensible in general, and
   the comments in the code are not much better either.

 - The function was inexplicably placed into e820.c, while it has very
   little connection to the E820 table: when we call
   memblock_find_dma_reserve() then memblock is already set up and we
   are not using the E820 table anymore.

 - The function is a wrapper around set_dma_reserve(), but changed the 'set'
   name to 'find' - actively misleading about its primary purpose, which is
   still to set the DMA-reserve value.

 - The function is limited to 64-bit systems, but neither the changelog nor
   the comments explain why. The change would appear to be relevant to
   32-bit systems as well, as the ISA DMA zone is the first 16 MB of RAM.

So address some of these problems:

 - Move it into arch/x86/mm/init.c, next to the other zone setup related
   functions.

 - Clean up the code flow and names of local variables a bit.

 - Rename it to memblock_set_dma_reserve()

 - Improve the comments.

No change in functionality. Enabling it for 32-bit systems is left
for a separate patch.

Cc: Alex Thorlton <athorlton@sgi.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Huang, Ying <ying.huang@intel.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Juergen Gross <jgross@suse.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Paul Jackson <pj@sgi.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Rafael J. Wysocki <rjw@sisk.pl>
Cc: Tejun Heo <tj@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Wei Yang <richard.weiyang@gmail.com>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2017-01-28 14:42:28 +01:00
arch x86/boot/e820: Move the memblock_find_dma_reserve() function and rename it to memblock_set_dma_reserve() 2017-01-28 14:42:28 +01:00
block
certs
crypto
Documentation x86/boot/e820: Rename everything to e820_table 2017-01-28 09:33:16 +01:00
drivers x86/boot/e820: Move asm/e820.h to asm/e820/api.h 2017-01-28 09:31:13 +01:00
firmware
fs Contained in this update: 2017-01-27 12:44:32 -08:00
include Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-01-27 12:54:16 -08:00
init
ipc
kernel Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-01-27 12:54:16 -08:00
lib
mm
net Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-01-27 12:54:16 -08:00
samples
scripts
security
sound
tools x86/boot/e820: Rename everything to e820_table 2017-01-28 09:33:16 +01:00
usr
virt
.cocciconfig
.get_maintainer.ignore
.gitattributes
.gitignore
.mailmap
COPYING
CREDITS
Kbuild
Kconfig
MAINTAINERS Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2017-01-27 12:54:16 -08:00
Makefile
README

README 

Linux kernel
============

This file was moved to Documentation/admin-guide/README.rst

Please notice that there are several guides for kernel developers and users.
These guides can be rendered in a number of formats, like HTML and PDF.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.

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.