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    SubjectRe: [PATCH v5 3/5] vduse: Support using userspace pages as bounce buffer
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    Greetings,

    On Wed, 2022-08-03 at 12:55 +0800, Xie Yongji wrote:
    >
    > diff --git a/drivers/vdpa/vdpa_user/iova_domain.h b/drivers/vdpa/vdpa_user/iova_domain.h
    > index 2722d9b8e21a..4e0e50e7ac15 100644
    > --- a/drivers/vdpa/vdpa_user/iova_domain.h
    > +++ b/drivers/vdpa/vdpa_user/iova_domain.h
    > @@ -14,6 +14,7 @@
    >  #include <linux/iova.h>
    >  #include <linux/dma-mapping.h>
    >  #include <linux/vhost_iotlb.h>
    > +#include <linux/rwlock.h>
    ^^^^^^^^

    Erm, that should be spinlock.h.

    #ifndef __LINUX_RWLOCK_H
    #define __LINUX_RWLOCK_H

    #ifndef __LINUX_SPINLOCK_H
    # error "please don't include this file directly"
    #endif

    This belated comment inspired by PREEMPT_RT build meeting the above :)

    -Mike

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