leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity

sh: Fix an unusual memory initialisation error.

Browse Source 
This fixes a problems with the set up of Linux memory:

 - When reserving memory at boot time, the code previously reserved
   the bottom page of memory, and then from one page up to the end of
   the bootmap. This had the desired effect, but was strictly speaking
   wrong, as the one page was actually whatever CONFIG_ZERO_PAGE_OFFSET
   had been set to.

Signed-off-by: Stuart Menefy <stuart.menefy@st.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Stuart Menefy 2008-09-05 16:29:40 +09:00 committed by Paul Mundt
parent 664718a343
commit f040ddaf4c
1 changed files with 6 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
arch/sh/kernel/setup.c
View File

@ -233,15 +233,17 @@ void __init setup_bootmem_allocator(unsigned long free_pfn)
* case of us accidentally initializing the bootmem allocator with
* an invalid RAM area.
*/
reserve_bootmem(__MEMORY_START+PAGE_SIZE,
(PFN_PHYS(free_pfn)+bootmap_size+PAGE_SIZE-1)-__MEMORY_START,
BOOTMEM_DEFAULT);
reserve_bootmem(__MEMORY_START + CONFIG_ZERO_PAGE_OFFSET,
(PFN_PHYS(free_pfn) + bootmap_size + PAGE_SIZE - 1) -
(__MEMORY_START + CONFIG_ZERO_PAGE_OFFSET),
BOOTMEM_DEFAULT);
/*
* reserve physical page 0 - it's a special BIOS page on many boxes,
* enabling clean reboots, SMP operation, laptop functions.
*/
reserve_bootmem(__MEMORY_START, PAGE_SIZE, BOOTMEM_DEFAULT);
reserve_bootmem(__MEMORY_START, CONFIG_ZERO_PAGE_OFFSET,
BOOTMEM_DEFAULT);
sparse_memory_present_with_active_regions(0);