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| author | Yinghai Lu <yhlu.kernel@gmail.com> | 2008-09-04 21:02:44 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-09-04 21:02:44 +0200 |
| commit | 268364a0f48aee2f851f9d1ef8a6cda0f3039ef1 (patch) | |
| tree | 018d00aa42b74a80baf976258aa9b17abdfb44c6 /include | |
| parent | d210baf53b699fc61aa891c177b71d7082d3b957 (diff) | |
IO resources: add reserve_region_with_split()
add reserve_region_with_split() to not lose e820 reserved entries if
they overlap with existing IO regions:
with test case by extend 0xe0000000 - 0xeffffff to 0xdd800000 -
we get:
e0000000-efffffff : PCI MMCONFIG 0
e0000000-efffffff : reserved
and in /proc/iomem we get:
found conflict for reserved [dd800000, efffffff], try to reserve with split
__reserve_region_with_split: (PCI Bus #80) [dd000000, ddffffff], res: (reserved) [dd800000, efffffff]
__reserve_region_with_split: (PCI Bus #00) [de000000, dfffffff], res: (reserved) [de000000, efffffff]
initcall pci_subsys_init+0x0/0x121 returned 0 after 381 msecs
in dmesg
various fixes and improvements suggested by Linus.
Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/ioport.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/ioport.h b/include/linux/ioport.h index 8d3b7a9afd1..fded376b94e 100644 --- a/include/linux/ioport.h +++ b/include/linux/ioport.h @@ -108,6 +108,9 @@ extern struct resource iomem_resource; extern int request_resource(struct resource *root, struct resource *new); extern int release_resource(struct resource *new); +extern void reserve_region_with_split(struct resource *root, + resource_size_t start, resource_size_t end, + const char *name); extern int insert_resource(struct resource *parent, struct resource *new); extern void insert_resource_expand_to_fit(struct resource *root, struct resource *new); extern int allocate_resource(struct resource *root, struct resource *new, |