From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from cantor2.suse.de ([195.135.220.15]:35657 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2993499AbbEEQBY (ORCPT ); Tue, 5 May 2015 12:01:24 -0400 From: Jan Kara To: linux-mm@kvack.org Cc: linux-media@vger.kernel.org, Hans Verkuil , dri-devel@lists.freedesktop.org, Pawel Osciak , Mauro Carvalho Chehab , mgorman@suse.de, Marek Szyprowski , Jan Kara Subject: [PATCH 8/9] media: vb2: Remove unused functions Date: Tue, 5 May 2015 18:01:17 +0200 Message-Id: <1430841678-11117-9-git-send-email-jack@suse.cz> In-Reply-To: <1430841678-11117-1-git-send-email-jack@suse.cz> References: <1430841678-11117-1-git-send-email-jack@suse.cz> Sender: linux-media-owner@vger.kernel.org List-ID: Conversion to the use of pinned pfns made some functions unused. Remove them. Also there's no need to lock mmap_sem in __buf_prepare() anymore. Acked-by: Marek Szyprowski Tested-by: Marek Szyprowski Signed-off-by: Jan Kara --- drivers/media/v4l2-core/videobuf2-memops.c | 114 ----------------------------- include/media/videobuf2-memops.h | 6 -- 2 files changed, 120 deletions(-) diff --git a/drivers/media/v4l2-core/videobuf2-memops.c b/drivers/media/v4l2-core/videobuf2-memops.c index 0ec186d41b9b..48c6a49c4928 100644 --- a/drivers/media/v4l2-core/videobuf2-memops.c +++ b/drivers/media/v4l2-core/videobuf2-memops.c @@ -23,120 +23,6 @@ #include /** - * vb2_get_vma() - acquire and lock the virtual memory area - * @vma: given virtual memory area - * - * This function attempts to acquire an area mapped in the userspace for - * the duration of a hardware operation. The area is "locked" by performing - * the same set of operation that are done when process calls fork() and - * memory areas are duplicated. - * - * Returns a copy of a virtual memory region on success or NULL. - */ -struct vm_area_struct *vb2_get_vma(struct vm_area_struct *vma) -{ - struct vm_area_struct *vma_copy; - - vma_copy = kmalloc(sizeof(*vma_copy), GFP_KERNEL); - if (vma_copy == NULL) - return NULL; - - if (vma->vm_ops && vma->vm_ops->open) - vma->vm_ops->open(vma); - - if (vma->vm_file) - get_file(vma->vm_file); - - memcpy(vma_copy, vma, sizeof(*vma)); - - vma_copy->vm_mm = NULL; - vma_copy->vm_next = NULL; - vma_copy->vm_prev = NULL; - - return vma_copy; -} -EXPORT_SYMBOL_GPL(vb2_get_vma); - -/** - * vb2_put_userptr() - release a userspace virtual memory area - * @vma: virtual memory region associated with the area to be released - * - * This function releases the previously acquired memory area after a hardware - * operation. - */ -void vb2_put_vma(struct vm_area_struct *vma) -{ - if (!vma) - return; - - if (vma->vm_ops && vma->vm_ops->close) - vma->vm_ops->close(vma); - - if (vma->vm_file) - fput(vma->vm_file); - - kfree(vma); -} -EXPORT_SYMBOL_GPL(vb2_put_vma); - -/** - * vb2_get_contig_userptr() - lock physically contiguous userspace mapped memory - * @vaddr: starting virtual address of the area to be verified - * @size: size of the area - * @res_paddr: will return physical address for the given vaddr - * @res_vma: will return locked copy of struct vm_area for the given area - * - * This function will go through memory area of size @size mapped at @vaddr and - * verify that the underlying physical pages are contiguous. If they are - * contiguous the virtual memory area is locked and a @res_vma is filled with - * the copy and @res_pa set to the physical address of the buffer. - * - * Returns 0 on success. - */ -int vb2_get_contig_userptr(unsigned long vaddr, unsigned long size, - struct vm_area_struct **res_vma, dma_addr_t *res_pa) -{ - struct mm_struct *mm = current->mm; - struct vm_area_struct *vma; - unsigned long offset, start, end; - unsigned long this_pfn, prev_pfn; - dma_addr_t pa = 0; - - start = vaddr; - offset = start & ~PAGE_MASK; - end = start + size; - - vma = find_vma(mm, start); - - if (vma == NULL || vma->vm_end < end) - return -EFAULT; - - for (prev_pfn = 0; start < end; start += PAGE_SIZE) { - int ret = follow_pfn(vma, start, &this_pfn); - if (ret) - return ret; - - if (prev_pfn == 0) - pa = this_pfn << PAGE_SHIFT; - else if (this_pfn != prev_pfn + 1) - return -EFAULT; - - prev_pfn = this_pfn; - } - - /* - * Memory is contigous, lock vma and return to the caller - */ - *res_vma = vb2_get_vma(vma); - if (*res_vma == NULL) - return -ENOMEM; - - *res_pa = pa + offset; - return 0; -} -EXPORT_SYMBOL_GPL(vb2_get_contig_userptr); - -/** * vb2_create_framevec() - map virtual addresses to pfns * @start: Virtual user address where we start mapping * @length: Length of a range to map diff --git a/include/media/videobuf2-memops.h b/include/media/videobuf2-memops.h index 2f0564ff5f31..830b5239fd8b 100644 --- a/include/media/videobuf2-memops.h +++ b/include/media/videobuf2-memops.h @@ -31,12 +31,6 @@ struct vb2_vmarea_handler { extern const struct vm_operations_struct vb2_common_vm_ops; -int vb2_get_contig_userptr(unsigned long vaddr, unsigned long size, - struct vm_area_struct **res_vma, dma_addr_t *res_pa); - -struct vm_area_struct *vb2_get_vma(struct vm_area_struct *vma); -void vb2_put_vma(struct vm_area_struct *vma); - struct frame_vector *vb2_create_framevec(unsigned long start, unsigned long length, bool write); -- 2.1.4 From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wg0-f52.google.com (mail-wg0-f52.google.com [74.125.82.52]) by kanga.kvack.org (Postfix) with ESMTP id 5A05A6B006C for ; Tue, 5 May 2015 12:01:30 -0400 (EDT) Received: by wgiu9 with SMTP id u9so25191320wgi.3 for ; Tue, 05 May 2015 09:01:30 -0700 (PDT) Received: from mx2.suse.de (cantor2.suse.de. [195.135.220.15]) by mx.google.com with ESMTPS id oz6si28921019wjb.53.2015.05.05.09.01.23 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Tue, 05 May 2015 09:01:23 -0700 (PDT) From: Jan Kara Subject: [PATCH 8/9] media: vb2: Remove unused functions Date: Tue, 5 May 2015 18:01:17 +0200 Message-Id: <1430841678-11117-9-git-send-email-jack@suse.cz> In-Reply-To: <1430841678-11117-1-git-send-email-jack@suse.cz> References: <1430841678-11117-1-git-send-email-jack@suse.cz> Sender: owner-linux-mm@kvack.org List-ID: To: linux-mm@kvack.org Cc: linux-media@vger.kernel.org, Hans Verkuil , dri-devel@lists.freedesktop.org, Pawel Osciak , Mauro Carvalho Chehab , mgorman@suse.de, Marek Szyprowski , Jan Kara Conversion to the use of pinned pfns made some functions unused. Remove them. Also there's no need to lock mmap_sem in __buf_prepare() anymore. Acked-by: Marek Szyprowski Tested-by: Marek Szyprowski Signed-off-by: Jan Kara --- drivers/media/v4l2-core/videobuf2-memops.c | 114 ----------------------------- include/media/videobuf2-memops.h | 6 -- 2 files changed, 120 deletions(-) diff --git a/drivers/media/v4l2-core/videobuf2-memops.c b/drivers/media/v4l2-core/videobuf2-memops.c index 0ec186d41b9b..48c6a49c4928 100644 --- a/drivers/media/v4l2-core/videobuf2-memops.c +++ b/drivers/media/v4l2-core/videobuf2-memops.c @@ -23,120 +23,6 @@ #include /** - * vb2_get_vma() - acquire and lock the virtual memory area - * @vma: given virtual memory area - * - * This function attempts to acquire an area mapped in the userspace for - * the duration of a hardware operation. The area is "locked" by performing - * the same set of operation that are done when process calls fork() and - * memory areas are duplicated. - * - * Returns a copy of a virtual memory region on success or NULL. - */ -struct vm_area_struct *vb2_get_vma(struct vm_area_struct *vma) -{ - struct vm_area_struct *vma_copy; - - vma_copy = kmalloc(sizeof(*vma_copy), GFP_KERNEL); - if (vma_copy == NULL) - return NULL; - - if (vma->vm_ops && vma->vm_ops->open) - vma->vm_ops->open(vma); - - if (vma->vm_file) - get_file(vma->vm_file); - - memcpy(vma_copy, vma, sizeof(*vma)); - - vma_copy->vm_mm = NULL; - vma_copy->vm_next = NULL; - vma_copy->vm_prev = NULL; - - return vma_copy; -} -EXPORT_SYMBOL_GPL(vb2_get_vma); - -/** - * vb2_put_userptr() - release a userspace virtual memory area - * @vma: virtual memory region associated with the area to be released - * - * This function releases the previously acquired memory area after a hardware - * operation. - */ -void vb2_put_vma(struct vm_area_struct *vma) -{ - if (!vma) - return; - - if (vma->vm_ops && vma->vm_ops->close) - vma->vm_ops->close(vma); - - if (vma->vm_file) - fput(vma->vm_file); - - kfree(vma); -} -EXPORT_SYMBOL_GPL(vb2_put_vma); - -/** - * vb2_get_contig_userptr() - lock physically contiguous userspace mapped memory - * @vaddr: starting virtual address of the area to be verified - * @size: size of the area - * @res_paddr: will return physical address for the given vaddr - * @res_vma: will return locked copy of struct vm_area for the given area - * - * This function will go through memory area of size @size mapped at @vaddr and - * verify that the underlying physical pages are contiguous. If they are - * contiguous the virtual memory area is locked and a @res_vma is filled with - * the copy and @res_pa set to the physical address of the buffer. - * - * Returns 0 on success. - */ -int vb2_get_contig_userptr(unsigned long vaddr, unsigned long size, - struct vm_area_struct **res_vma, dma_addr_t *res_pa) -{ - struct mm_struct *mm = current->mm; - struct vm_area_struct *vma; - unsigned long offset, start, end; - unsigned long this_pfn, prev_pfn; - dma_addr_t pa = 0; - - start = vaddr; - offset = start & ~PAGE_MASK; - end = start + size; - - vma = find_vma(mm, start); - - if (vma == NULL || vma->vm_end < end) - return -EFAULT; - - for (prev_pfn = 0; start < end; start += PAGE_SIZE) { - int ret = follow_pfn(vma, start, &this_pfn); - if (ret) - return ret; - - if (prev_pfn == 0) - pa = this_pfn << PAGE_SHIFT; - else if (this_pfn != prev_pfn + 1) - return -EFAULT; - - prev_pfn = this_pfn; - } - - /* - * Memory is contigous, lock vma and return to the caller - */ - *res_vma = vb2_get_vma(vma); - if (*res_vma == NULL) - return -ENOMEM; - - *res_pa = pa + offset; - return 0; -} -EXPORT_SYMBOL_GPL(vb2_get_contig_userptr); - -/** * vb2_create_framevec() - map virtual addresses to pfns * @start: Virtual user address where we start mapping * @length: Length of a range to map diff --git a/include/media/videobuf2-memops.h b/include/media/videobuf2-memops.h index 2f0564ff5f31..830b5239fd8b 100644 --- a/include/media/videobuf2-memops.h +++ b/include/media/videobuf2-memops.h @@ -31,12 +31,6 @@ struct vb2_vmarea_handler { extern const struct vm_operations_struct vb2_common_vm_ops; -int vb2_get_contig_userptr(unsigned long vaddr, unsigned long size, - struct vm_area_struct **res_vma, dma_addr_t *res_pa); - -struct vm_area_struct *vb2_get_vma(struct vm_area_struct *vma); -void vb2_put_vma(struct vm_area_struct *vma); - struct frame_vector *vb2_create_framevec(unsigned long start, unsigned long length, bool write); -- 2.1.4 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. 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