From: lantianyu1986@gmail.com
To: unlisted-recipients:; (no To-header on input)
Cc: Lan Tianyu <Tianyu.Lan@microsoft.com>,
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,
pbonzini@redhat.com, rkrcmar@redhat.com,
devel@linuxdriverproject.org, linux-kernel@vger.kernel.org,
kvm@vger.kernel.org, michael.h.kelley@microsoft.com,
vkuznets@redhat.com, stable@vger.kernel.org
Subject: [PATCH] x86/Hyper-V: Fix definition HV_MAX_FLUSH_REP_COUNT
Date: Fri, 22 Feb 2019 18:48:44 +0800 [thread overview]
Message-ID: <20190222104844.1847-1-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>
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
next reply other threads:[~2019-02-22 10:48 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-22 10:48 lantianyu1986 [this message]
2019-02-22 14:32 ` [PATCH] x86/Hyper-V: Fix definition HV_MAX_FLUSH_REP_COUNT Greg KH
2019-02-23 14:35 ` Tianyu Lan
2019-03-15 17:45 ` Paolo Bonzini
2019-03-20 8:29 ` Thomas Gleixner
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