From: Souptick Joarder <jrdr.linux@gmail.com> To: boris.ostrovsky@oracle.com, jgross@suse.com, sstabellini@kernel.org Cc: xen-devel@lists.xenproject.org, linux-kernel@vger.kernel.org, Souptick Joarder <jrdr.linux@gmail.com>, John Hubbard <jhubbard@nvidia.com>, Paul Durrant <xadimgnik@gmail.com> Subject: [PATCH v3 3/3] xen/privcmd: Convert get_user_pages*() to pin_user_pages*() Date: Sun, 12 Jul 2020 09:09:55 +0530 [thread overview] Message-ID: <1594525195-28345-4-git-send-email-jrdr.linux@gmail.com> (raw) In-Reply-To: <1594525195-28345-1-git-send-email-jrdr.linux@gmail.com> In 2019, we introduced pin_user_pages*() and now we are converting get_user_pages*() to the new API as appropriate. [1] & [2] could be referred for more information. This is case 5 as per document [1]. [1] Documentation/core-api/pin_user_pages.rst [2] "Explicit pinning of user-space pages": https://lwn.net/Articles/807108/ Signed-off-by: Souptick Joarder <jrdr.linux@gmail.com> Reviewed-by: Juergen Gross <jgross@suse.com> Cc: John Hubbard <jhubbard@nvidia.com> Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com> Cc: Paul Durrant <xadimgnik@gmail.com> --- drivers/xen/privcmd.c | 10 ++-------- 1 file changed, 2 insertions(+), 8 deletions(-) diff --git a/drivers/xen/privcmd.c b/drivers/xen/privcmd.c index 079d35b..63abe6c 100644 --- a/drivers/xen/privcmd.c +++ b/drivers/xen/privcmd.c @@ -593,7 +593,7 @@ static int lock_pages( if (requested > nr_pages) return -ENOSPC; - page_count = get_user_pages_fast( + page_count = pin_user_pages_fast( (unsigned long) kbufs[i].uptr, requested, FOLL_WRITE, pages); if (page_count < 0) @@ -609,13 +609,7 @@ static int lock_pages( static void unlock_pages(struct page *pages[], unsigned int nr_pages) { - unsigned int i; - - for (i = 0; i < nr_pages; i++) { - if (!PageDirty(pages[i])) - set_page_dirty_lock(pages[i]); - put_page(pages[i]); - } + unpin_user_pages_dirty_lock(pages, nr_pages, true); } static long privcmd_ioctl_dm_op(struct file *file, void __user *udata) -- 1.9.1
WARNING: multiple messages have this Message-ID (diff)
From: Souptick Joarder <jrdr.linux@gmail.com> To: boris.ostrovsky@oracle.com, jgross@suse.com, sstabellini@kernel.org Cc: xen-devel@lists.xenproject.org, Paul Durrant <xadimgnik@gmail.com>, linux-kernel@vger.kernel.org, John Hubbard <jhubbard@nvidia.com>, Souptick Joarder <jrdr.linux@gmail.com> Subject: [PATCH v3 3/3] xen/privcmd: Convert get_user_pages*() to pin_user_pages*() Date: Sun, 12 Jul 2020 09:09:55 +0530 [thread overview] Message-ID: <1594525195-28345-4-git-send-email-jrdr.linux@gmail.com> (raw) In-Reply-To: <1594525195-28345-1-git-send-email-jrdr.linux@gmail.com> In 2019, we introduced pin_user_pages*() and now we are converting get_user_pages*() to the new API as appropriate. [1] & [2] could be referred for more information. This is case 5 as per document [1]. [1] Documentation/core-api/pin_user_pages.rst [2] "Explicit pinning of user-space pages": https://lwn.net/Articles/807108/ Signed-off-by: Souptick Joarder <jrdr.linux@gmail.com> Reviewed-by: Juergen Gross <jgross@suse.com> Cc: John Hubbard <jhubbard@nvidia.com> Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com> Cc: Paul Durrant <xadimgnik@gmail.com> --- drivers/xen/privcmd.c | 10 ++-------- 1 file changed, 2 insertions(+), 8 deletions(-) diff --git a/drivers/xen/privcmd.c b/drivers/xen/privcmd.c index 079d35b..63abe6c 100644 --- a/drivers/xen/privcmd.c +++ b/drivers/xen/privcmd.c @@ -593,7 +593,7 @@ static int lock_pages( if (requested > nr_pages) return -ENOSPC; - page_count = get_user_pages_fast( + page_count = pin_user_pages_fast( (unsigned long) kbufs[i].uptr, requested, FOLL_WRITE, pages); if (page_count < 0) @@ -609,13 +609,7 @@ static int lock_pages( static void unlock_pages(struct page *pages[], unsigned int nr_pages) { - unsigned int i; - - for (i = 0; i < nr_pages; i++) { - if (!PageDirty(pages[i])) - set_page_dirty_lock(pages[i]); - put_page(pages[i]); - } + unpin_user_pages_dirty_lock(pages, nr_pages, true); } static long privcmd_ioctl_dm_op(struct file *file, void __user *udata) -- 1.9.1
next prev parent reply other threads:[~2020-07-12 3:31 UTC|newest] Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-07-12 3:39 [PATCH v3 0/3] Few bug fixes and Convert to pin_user_pages*() Souptick Joarder 2020-07-12 3:39 ` Souptick Joarder 2020-07-12 3:39 ` [PATCH v3 1/3] xen/privcmd: Corrected error handling path Souptick Joarder 2020-07-12 3:39 ` Souptick Joarder 2020-07-13 8:08 ` Paul Durrant 2020-07-13 8:08 ` Paul Durrant 2020-07-12 3:39 ` [PATCH v3 2/3] xen/privcmd: Mark pages as dirty Souptick Joarder 2020-07-12 3:39 ` Souptick Joarder 2020-07-13 8:09 ` Paul Durrant 2020-07-13 8:09 ` Paul Durrant 2020-07-12 3:39 ` Souptick Joarder [this message] 2020-07-12 3:39 ` [PATCH v3 3/3] xen/privcmd: Convert get_user_pages*() to pin_user_pages*() Souptick Joarder 2020-07-13 8:10 ` Paul Durrant 2020-07-13 8:10 ` Paul Durrant 2020-07-28 7:10 ` [PATCH v3 0/3] Few bug fixes and Convert " Souptick Joarder 2020-07-28 7:10 ` Souptick Joarder 2020-07-28 7:38 ` Jürgen Groß 2020-07-28 7:38 ` Jürgen Groß 2020-08-03 5:44 ` Jürgen Groß 2020-08-03 5:44 ` Jürgen Groß
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