[tip: x86/platform] x86/platform/uv: Introduce helper function uv_pnode_to_socket.

[tip-bot2 for Steve Wahl]

The following commit has been merged into the x86/platform branch of tip:

Commit-ID:     8c646cee0ae3c0a19a7d9fdb847c45c729cae945
Gitweb:        https://git.kernel.org/tip/8c646cee0ae3c0a19a7d9fdb847c45c729cae945
Author:        Steve Wahl <steve.wahl@xxxxxxx>
AuthorDate:    Fri, 19 May 2023 14:07:46 -05:00
Committer:     Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
CommitterDate: Wed, 31 May 2023 09:34:59 -07:00

x86/platform/uv: Introduce helper function uv_pnode_to_socket.

Add and use uv_pnode_to_socket() function, which parallels other
helper functions in here, and will enable avoiding duplicate code
in an upcoming patch.

Signed-off-by: Steve Wahl <steve.wahl@xxxxxxx>
Signed-off-by: Dave Hansen <dave.hansen@xxxxxxxxxxxxxxx>
Link: https://lore.kernel.org/all/20230519190752.3297140-3-steve.wahl%40hpe.com
---
 arch/x86/include/asm/uv/uv_hub.h | 12 +++++++++---
 1 file changed, 9 insertions(+), 3 deletions(-)

diff --git a/arch/x86/include/asm/uv/uv_hub.h b/arch/x86/include/asm/uv/uv_hub.h
index d3e3197..0acfd17 100644
--- a/arch/x86/include/asm/uv/uv_hub.h
+++ b/arch/x86/include/asm/uv/uv_hub.h
@@ -519,18 +519,24 @@ static inline int uv_socket_to_node(int socket)
 	return _uv_socket_to_node(socket, uv_hub_info->socket_to_node);
 }
 
+static inline int uv_pnode_to_socket(int pnode)
+{
+	unsigned short *p2s = uv_hub_info->pnode_to_socket;
+
+	return p2s ? p2s[pnode - uv_hub_info->min_pnode] : pnode;
+}
+
 /* pnode, offset --> socket virtual */
 static inline void *uv_pnode_offset_to_vaddr(int pnode, unsigned long offset)
 {
 	unsigned int m_val = uv_hub_info->m_val;
 	unsigned long base;
-	unsigned short sockid, node, *p2s;
+	unsigned short sockid, node;
 
 	if (m_val)
 		return __va(((unsigned long)pnode << m_val) | offset);
 
-	p2s = uv_hub_info->pnode_to_socket;
-	sockid = p2s ? p2s[pnode - uv_hub_info->min_pnode] : pnode;
+	sockid = uv_pnode_to_socket(pnode);
 	node = uv_socket_to_node(sockid);
 
 	/* limit address of previous socket is our base, except node 0 is 0 */