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...adata cache") Reported-by: kbuild test robot <lkp at intel.com> Signed-off-by: Michael S. Tsirkin <mst at redhat.com> --- drivers/vhost/vhost.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c index d450e16c5c25..21a59b598ed8 100644 --- a/drivers/vhost/vhost.c +++ b/drivers/vhost/vhost.c @@ -730,7 +730,7 @@ static inline void __user *vhost_vq_meta_fetch(struct vhost_virtqueue *vq, if (!map) return NULL; - return (void *)(uintptr_t)(map->addr + addr - map->start); + return (void __user *)(uintptr_t)(map->...

Hi, It recently became clear to me that there are some get_user_pages*() callers that don't fit neatly into any of the four cases that are so far listed in pin_user_pages.rst. vhost.c is one of those. Add a Case 5 to the documentation, and refer to that when converting vhost.c. Thanks to Jan Kara for helping me (again) in understanding the interaction between get_user_pages() and page

...ernel.org Cc: virtualization at lists.linux-foundation.org Cc: netdev at vger.kernel.org Signed-off-by: John Hubbard <jhubbard at nvidia.com> --- drivers/vhost/vhost.c | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c index 21a59b598ed8..596132a96cd5 100644 --- a/drivers/vhost/vhost.c +++ b/drivers/vhost/vhost.c @@ -1762,15 +1762,14 @@ static int set_bit_to_user(int nr, void __user *addr) int bit = nr + (log % PAGE_SIZE) * 8; int r; - r = get_user_pages_fast(log, 1, FOLL_WRITE, &page); + r = pin_user_pages_fast(log, 1, F...

This is based on Linux 5.7, plus one prerequisite patch: "mm/gup: update pin_user_pages.rst for "case 3" (mmu notifiers)" [1] Changes since v1: removed references to set_page_dirty*(), in response to Souptick Joarder's review (thanks!). Cover letter for v1, edited/updated slightly: It recently became clear to me that there are some get_user_pages*() callers that