[PATCH v2] delete unnecessary bootmem struct page array

Real Name
2014-06-03T05:31:38Z

From: Honggang Li <enjoymindful@gmail.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@name linux-next]$ make ARCH=um defconfig
[real@name linux-next]$ make ARCH=um linux
[real@name 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@name linux-next]$ ./linux ubda=/home/real/linux-next/Fedora20-AMD64-root_fs mem=256m && sync && echo 1
[real@name 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(-)

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1.8.3.1