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Subject[PATCH] x86/Hyper-V: Fix definition HV_MAX_FLUSH_REP_COUNT
Date
From: Lan Tianyu <Tianyu.Lan@microsoft.com>

The max flush rep count of HvFlushGuestPhysicalAddressList hypercall
is equal with how many entries of union hv_gpa_page_range can be populated
into the input parameter page. The origin code lacks parenthesis around
PAGE_SIZE - 2 * sizeof(u64). This patch is to fix it.

Cc: <stable@vger.kernel.org>
Fixs: cc4edae4b9(x86/hyper-v: Add HvFlushGuestAddressList hypercall support)
Signed-off-by: Lan Tianyu <Tianyu.Lan@microsoft.com>
---
arch/x86/include/asm/hyperv-tlfs.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/include/asm/hyperv-tlfs.h b/arch/x86/include/asm/hyperv-tlfs.h
index 705dafc2d11a..2bdbbbcfa393 100644
--- a/arch/x86/include/asm/hyperv-tlfs.h
+++ b/arch/x86/include/asm/hyperv-tlfs.h
@@ -841,7 +841,7 @@ union hv_gpa_page_range {
* count is equal with how many entries of union hv_gpa_page_range can
* be populated into the input parameter page.
*/
-#define HV_MAX_FLUSH_REP_COUNT (PAGE_SIZE - 2 * sizeof(u64) / \
+#define HV_MAX_FLUSH_REP_COUNT ((PAGE_SIZE - 2 * sizeof(u64)) / \
sizeof(union hv_gpa_page_range))

struct hv_guest_mapping_flush_list {
--
2.14.4
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