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authorMaya Nakamura <m.maya.nakamura@gmail.com>2019-07-12 11:25:18 +0300
committerThomas Gleixner <tglx@linutronix.de>2019-07-22 12:06:45 +0300
commit83527ef7abf7c02c33a90b00f0954db35415adbd (patch)
treec13e1ce4981782d48536945a66c5449bd8507a37 /drivers/hv
parent8c3e44bde7fd1b8291515f046008225711ac7beb (diff)
downloadlinux-83527ef7abf7c02c33a90b00f0954db35415adbd.tar.xz
drivers: hv: vmbus: Replace page definition with Hyper-V specific one
Replace PAGE_SIZE with HV_HYP_PAGE_SIZE because the guest page size may not be 4096 on all architectures and Hyper-V always runs with a page size of 4096. Signed-off-by: Maya Nakamura <m.maya.nakamura@gmail.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Michael Kelley <mikelley@microsoft.com> Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com> Acked-by: Sasha Levin <sashal@kernel.org> Link: https://lkml.kernel.org/r/0d9e80ecabcc950dc279fdd2e39bea4060123ba4.1562916939.git.m.maya.nakamura@gmail.com
Diffstat (limited to 'drivers/hv')
-rw-r--r--drivers/hv/hyperv_vmbus.h8
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/hv/hyperv_vmbus.h b/drivers/hv/hyperv_vmbus.h
index 362e70e9d145..6bf64cb6e31a 100644
--- a/drivers/hv/hyperv_vmbus.h
+++ b/drivers/hv/hyperv_vmbus.h
@@ -192,11 +192,11 @@ int hv_ringbuffer_read(struct vmbus_channel *channel,
u64 *requestid, bool raw);
/*
- * Maximum channels is determined by the size of the interrupt page
- * which is PAGE_SIZE. 1/2 of PAGE_SIZE is for send endpoint interrupt
- * and the other is receive endpoint interrupt
+ * The Maximum number of channels (16348) is determined by the size of the
+ * interrupt page, which is HV_HYP_PAGE_SIZE. 1/2 of HV_HYP_PAGE_SIZE is to
+ * send endpoint interrupts, and the other is to receive endpoint interrupts.
*/
-#define MAX_NUM_CHANNELS ((PAGE_SIZE >> 1) << 3) /* 16348 channels */
+#define MAX_NUM_CHANNELS ((HV_HYP_PAGE_SIZE >> 1) << 3)
/* The value here must be in multiple of 32 */
/* TODO: Need to make this configurable */