linux-kernel - [PATCH v2] delete unnecessary bootmem struct page array

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Date:	Tue,  3 Jun 2014 13:30:44 +0800
From:	Real Name <enjoymindful@...il.com>
To:	user-mode-linux-devel@...ts.sourceforge.net
Cc:	richard@....at, linux-kernel@...r.kernel.org,
	Honggang Li <enjoymindful@...il.com>
Subject: [PATCH v2] delete unnecessary bootmem struct page array

From: Honggang Li <enjoymindful@...il.com>

The patch based on linux-next-2014-06-02.

The old init_maps function does two things:
1) allocates and initializes one struct page array for bootmem
2) count the number of total pages

After removed the source code related to the unnecessary array, the name 
'init_maps' is some kind of improper named, as it just count the number of
total page numbers. So, I renamed the function as 'mem_total_pages'.

I tested the patch through repeat reboot the uml kernel many times.
[real@...e linux-next]$ make ARCH=um defconfig
[real@...e linux-next]$ make ARCH=um linux
[real@...e linux-next]$ file linux
linux: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), dynamically linked (uses shared libs), for GNU/Linux 2.6.32, not stripped
[real@...e linux-next]$ ./linux ubda=/home/real/linux-next/Fedora20-AMD64-root_fs mem=256m && sync && echo 1
[real@...e linux-next]$ ./linux ubda=/home/real/linux-next/Fedora20-AMD64-root_fs mem=256m && sync && echo 2
(repeat reboot the uml kernel many times..)

Honggang Li (1):
  delete unnecessary bootmem struct page array

 arch/um/include/shared/mem_user.h |  2 +-
 arch/um/kernel/physmem.c          | 32 ++++++--------------------------
 arch/um/kernel/um_arch.c          |  7 +------
 3 files changed, 8 insertions(+), 33 deletions(-)

-- 
1.8.3.1

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