diff mbox series

[v4,03/13] kernel: resource: lookup_resource as exported symbol

Message ID 20210717192135.9030-4-alex.sierra@amd.com (mailing list archive)
State New
Headers show
Series Support DEVICE_GENERIC memory in migrate_vma_* | expand

Commit Message

Sierra Guiza, Alejandro (Alex) July 17, 2021, 7:21 p.m. UTC 
The AMD architecture for the Frontier supercomputer will
have device memory which can be coherently accessed by
the CPU. The system BIOS advertises this memory as SPM
(special purpose memory) in the UEFI system address map.

The AMDGPU driver needs to be able to lookup this resource
in order to claim it as MEMORY_DEVICE_GENERIC using
devm_memremap_pages.

Signed-off-by: Alex Sierra <alex.sierra@amd.com>
---
 kernel/resource.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Comments

Christoph Hellwig July 19, 2021, 9:16 a.m. UTC | #1 
On Sat, Jul 17, 2021 at 02:21:25PM -0500, Alex Sierra wrote:
>  	return res;
>  }
> -
> +EXPORT_SYMBOL_GPL(lookup_resource);
>  /*

Please keep this empty line (after the EXPORT_SYMBOL).
diff mbox series

Patch

diff --git a/kernel/resource.c b/kernel/resource.c
index 627e61b0c124..269489bb7097 100644
--- a/kernel/resource.c
+++ b/kernel/resource.c
@@ -783,7 +783,7 @@  struct resource *lookup_resource(struct resource *root, resource_size_t start)
 
 	return res;
 }
-
+EXPORT_SYMBOL_GPL(lookup_resource);
 /*
  * Insert a resource into the resource tree. If successful, return NULL,
  * otherwise return the conflicting resource (compare to __request_resource())