From: lantianyu1986@gmail.com
To: kys@microsoft.com, haiyangz@microsoft.com,
sthemmin@microsoft.com, sashal@kernel.org, tglx@linutronix.de,
mingo@redhat.com, bp@alien8.de, hpa@zytor.com, x86@kernel.org,
gregkh@linuxfoundation.org
Cc: Lan Tianyu <Tianyu.Lan@microsoft.com>,
devel@linuxdriverproject.org, linux-kernel@vger.kernel.org,
stable@vger.kernel.org
Subject: [PATCH V2] x86/Hyper-V: Fix definition HV_MAX_FLUSH_REP_COUNT
Date: Mon, 25 Feb 2019 22:31:14 +0800 [thread overview]
Message-ID: <20190225143114.5149-1-Tianyu.Lan@microsoft.com> (raw)
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>
Fixes: cc4edae4b924 ("x86/hyper-v: Add HvFlushGuestAddressList hypercall support")
Signed-off-by: Lan Tianyu <Tianyu.Lan@microsoft.com>
---
Change since v1
- Update change log
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
next reply other threads:[~2019-02-25 14:31 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-25 14:31 lantianyu1986 [this message]
2019-02-28 11:04 ` [tip:x86/urgent] x86/hyper-v: Fix definition of HV_MAX_FLUSH_REP_COUNT tip-bot for Lan Tianyu
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