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authorStefan Brüns <stefan.bruens@rwth-aachen.de>2016-10-01 23:32:28 +0200
committerAlexander Graf <agraf@suse.de>2016-10-18 09:08:07 +0200
commitb6a951727504d4159467ac98434849f81aaf9ffa (patch)
tree76b16d38c9396eb1b50d3709154b4d7b7331341e
parentb61d857b2ff3b0b099ef187d7ceebe26ea788578 (diff)
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efi_loader: Keep memory mapping sorted when splitting an entry
The code assumes sorted mappings in descending address order. When splitting a mapping, insert the new part next to the current mapping. Signed-off-by: Stefan Brüns <stefan.bruens@rwth-aachen.de> Reviewed-by: Alexander Graf <agraf@suse.de> Signed-off-by: Alexander Graf <agraf@suse.de>
-rw-r--r--lib/efi_loader/efi_memory.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/lib/efi_loader/efi_memory.c b/lib/efi_loader/efi_memory.c
index d3a2ffd..742bc90 100644
--- a/lib/efi_loader/efi_memory.c
+++ b/lib/efi_loader/efi_memory.c
@@ -135,7 +135,8 @@ static int efi_mem_carve_out(struct efi_mem_list *map,
newmap->desc = map->desc;
newmap->desc.physical_start = carve_start;
newmap->desc.num_pages = (map_end - carve_start) >> EFI_PAGE_SHIFT;
- list_add_tail(&newmap->link, &efi_mem);
+ /* Insert before current entry (descending address order) */
+ list_add_tail(&newmap->link, &map->link);
/* Shrink the map to [ map_start ... carve_start ] */
map_desc->num_pages = (carve_start - map_start) >> EFI_PAGE_SHIFT;