From mboxrd@z Thu Jan 1 00:00:00 1970 From: =?UTF-8?q?Noralf=20Tr=C3=B8nnes?= Date: Wed, 20 Apr 2016 15:25:26 +0000 Subject: [PATCH 5/8] fbdev: fb_defio: Export fb_deferred_io_mmap Message-Id: <1461165929-11344-6-git-send-email-noralf@tronnes.org> List-Id: References: <1461165929-11344-1-git-send-email-noralf@tronnes.org> In-Reply-To: <1461165929-11344-1-git-send-email-noralf@tronnes.org> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable To: dri-devel@lists.freedesktop.org, linux-fbdev@vger.kernel.org Cc: tomi.valkeinen@ti.com, laurent.pinchart@ideasonboard.com, linux-kernel@vger.kernel.org Export fb_deferred_io_mmap so drivers can change vma->vm_page_prot. When the framebuffer memory is allocated using dma_alloc_writecombine() instead of vmalloc(), I get cache syncing problems. This solves it: static int drm_fbdev_cma_deferred_io_mmap(struct fb_info *info, struct vm_area_struct *vma) { fb_deferred_io_mmap(info, vma); vma->vm_page_prot =3D pgprot_writecombine(vma->vm_page_prot); return 0; } Signed-off-by: Noralf Tr=C3=B8nnes --- drivers/video/fbdev/core/fb_defio.c | 3 ++- include/linux/fb.h | 1 + 2 files changed, 3 insertions(+), 1 deletion(-) diff --git a/drivers/video/fbdev/core/fb_defio.c b/drivers/video/fbdev/core= /fb_defio.c index 57721c7..74b5bca 100644 --- a/drivers/video/fbdev/core/fb_defio.c +++ b/drivers/video/fbdev/core/fb_defio.c @@ -164,7 +164,7 @@ static const struct address_space_operations fb_deferre= d_io_aops =3D { .set_page_dirty =3D fb_deferred_io_set_page_dirty, }; =20 -static int fb_deferred_io_mmap(struct fb_info *info, struct vm_area_struct= *vma) +int fb_deferred_io_mmap(struct fb_info *info, struct vm_area_struct *vma) { vma->vm_ops =3D &fb_deferred_io_vm_ops; vma->vm_flags |=3D VM_DONTEXPAND | VM_DONTDUMP; @@ -173,6 +173,7 @@ static int fb_deferred_io_mmap(struct fb_info *info, st= ruct vm_area_struct *vma) vma->vm_private_data =3D info; return 0; } +EXPORT_SYMBOL(fb_deferred_io_mmap); =20 /* workqueue callback */ static void fb_deferred_io_work(struct work_struct *work) diff --git a/include/linux/fb.h b/include/linux/fb.h index dfe8835..a964d07 100644 --- a/include/linux/fb.h +++ b/include/linux/fb.h @@ -673,6 +673,7 @@ static inline void __fb_pad_aligned_buffer(u8 *dst, u32= d_pitch, } =20 /* drivers/video/fb_defio.c */ +int fb_deferred_io_mmap(struct fb_info *info, struct vm_area_struct *vma); extern void fb_deferred_io_init(struct fb_info *info); extern void fb_deferred_io_open(struct fb_info *info, struct inode *inode, --=20 2.2.2