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Subject[PATCH v4 05/11] Drivers: hv: vmbus: Move virt_to_hvpfn() to hyperv header
Date
There will be more places other than vmbus where we need to calculate
the Hyper-V page PFN from a virtual address, so move virt_to_hvpfn() to
hyperv generic header.

Signed-off-by: Boqun Feng <boqun.feng@gmail.com>
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
---
drivers/hv/channel.c | 13 -------------
include/linux/hyperv.h | 15 +++++++++++++++
2 files changed, 15 insertions(+), 13 deletions(-)

diff --git a/drivers/hv/channel.c b/drivers/hv/channel.c
index 45267b6d069e..fbdda9938039 100644
--- a/drivers/hv/channel.c
+++ b/drivers/hv/channel.c
@@ -22,19 +22,6 @@

#include "hyperv_vmbus.h"

-static unsigned long virt_to_hvpfn(void *addr)
-{
- phys_addr_t paddr;
-
- if (is_vmalloc_addr(addr))
- paddr = page_to_phys(vmalloc_to_page(addr)) +
- offset_in_page(addr);
- else
- paddr = __pa(addr);
-
- return paddr >> HV_HYP_PAGE_SHIFT;
-}
-
/*
* hv_gpadl_size - Return the real size of a gpadl, the size that Hyper-V uses
*
diff --git a/include/linux/hyperv.h b/include/linux/hyperv.h
index 9c19149c0e1a..83456dc181a8 100644
--- a/include/linux/hyperv.h
+++ b/include/linux/hyperv.h
@@ -14,6 +14,7 @@

#include <uapi/linux/hyperv.h>

+#include <linux/mm.h>
#include <linux/types.h>
#include <linux/scatterlist.h>
#include <linux/list.h>
@@ -23,6 +24,7 @@
#include <linux/mod_devicetable.h>
#include <linux/interrupt.h>
#include <linux/reciprocal_div.h>
+#include <asm/hyperv-tlfs.h>

#define MAX_PAGE_BUFFER_COUNT 32
#define MAX_MULTIPAGE_BUFFER_COUNT 32 /* 128K */
@@ -1676,4 +1678,17 @@ struct hyperv_pci_block_ops {

extern struct hyperv_pci_block_ops hvpci_block_ops;

+static inline unsigned long virt_to_hvpfn(void *addr)
+{
+ phys_addr_t paddr;
+
+ if (is_vmalloc_addr(addr))
+ paddr = page_to_phys(vmalloc_to_page(addr)) +
+ offset_in_page(addr);
+ else
+ paddr = __pa(addr);
+
+ return paddr >> HV_HYP_PAGE_SHIFT;
+}
+
#endif /* _HYPERV_H */
--
2.28.0
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