A-Team_Digital_Solutions/android_kernel_motorola_sm6375
Watch
2
0
Fork
You've already forked android_kernel_motorola_sm6375
 0
mirror of https://github.com/BobTheBlinker/android_kernel_motorola_sm6375.git synced 2026-10-30 11:41:38 -04:00
Code Issues Projects Releases Packages Wiki Activity

bootmem: Add free_bootmem_late()

Browse source 
Add a new function for freeing bootmem after the bootmem
allocator has been released and the unreserved pages given to
the page allocator.

This allows us to reserve bootmem and then release it if we
later discover it was not needed.

( This new API will be used by the swiotlb code to recover
  a significant amount of RAM (64MB). )

Signed-off-by: FUJITA Tomonori <[email protected]>
Acked-by: Pekka Enberg <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Cc: Linus Torvalds <[email protected]>
LKML-Reference: <[email protected]>
Signed-off-by: Ingo Molnar <[email protected]>
This commit is contained in:
FUJITA Tomonori 2009-11-10 19:46:17 +09:00 • committed by Ingo Molnar
commit 9f993ac3f7
2 changed files with 25 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

24
mm/bootmem.c
View file

@ -143,6 +143,30 @@ unsigned long __init init_bootmem(unsigned long start, unsigned long pages)
return init_bootmem_core(NODE_DATA(0)->bdata, start, 0, pages);
}
/*
* free_bootmem_late - free bootmem pages directly to page allocator
* @addr: starting address of the range
* @size: size of the range in bytes
*
* This is only useful when the bootmem allocator has already been torn
* down, but we are still initializing the system. Pages are given directly
* to the page allocator, no bootmem metadata is updated because it is gone.
*/
void __init free_bootmem_late(unsigned long addr, unsigned long size)
{
unsigned long cursor, end;
kmemleak_free_part(__va(addr), size);
cursor = PFN_UP(addr);
end = PFN_DOWN(addr + size);
for (; cursor < end; cursor++) {
__free_pages_bootmem(pfn_to_page(cursor), 0);
totalram_pages++;
}
}
static unsigned long __init free_all_bootmem_core(bootmem_data_t *bdata)
{
int aligned;