lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Message-ID: <20180425045922.GA21590@jordon-HP-15-Notebook-PC> Date: Wed, 25 Apr 2018 10:29:22 +0530 From: Souptick Joarder <jrdr.linux@...il.com> To: airlied@...hat.com, christian.koenig@....com, cakturk@...il.com, seanpaul@...omium.org, daniel.vetter@...ll.ch, mhocko@...nel.org Cc: dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org, willy@...radead.org Subject: [PATCH v2] gpu: drm: udl: Adding new typedef vm_fault_t Use new return type vm_fault_t for fault and huge_fault handler. For now, this is just documenting that the function returns a VM_FAULT value rather than an errno. Once all instances are converted, vm_fault_t will become a distinct type. Commit 1c8f422059ae ("mm: change return type to vm_fault_t") Previously vm_insert_page() returns err which driver mapped into VM_FAULT_* type. The new function vmf_ insert_page() will replace this inefficiency by returning VM_FAULT_* type. Signed-off-by: Souptick Joarder <jrdr.linux@...il.com> Reviewed-by: Matthew Wilcox <mawilcox@...rosoft.com> --- v2: Updated the change log drivers/gpu/drm/udl/udl_drv.h | 3 ++- drivers/gpu/drm/udl/udl_gem.c | 15 ++------------- 2 files changed, 4 insertions(+), 14 deletions(-) diff --git a/drivers/gpu/drm/udl/udl_drv.h b/drivers/gpu/drm/udl/udl_drv.h index 2a75ab8..11151c4 100644 --- a/drivers/gpu/drm/udl/udl_drv.h +++ b/drivers/gpu/drm/udl/udl_drv.h @@ -16,6 +16,7 @@ #include <linux/usb.h> #include <drm/drm_gem.h> +#include <linux/mm_types.h> #define DRIVER_NAME "udl" #define DRIVER_DESC "DisplayLink" @@ -134,7 +135,7 @@ struct drm_gem_object *udl_gem_prime_import(struct drm_device *dev, int udl_gem_vmap(struct udl_gem_object *obj); void udl_gem_vunmap(struct udl_gem_object *obj); int udl_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma); -int udl_gem_fault(struct vm_fault *vmf); +vm_fault_t udl_gem_fault(struct vm_fault *vmf); int udl_handle_damage(struct udl_framebuffer *fb, int x, int y, int width, int height); diff --git a/drivers/gpu/drm/udl/udl_gem.c b/drivers/gpu/drm/udl/udl_gem.c index dee6bd9..cf5fe35 100644 --- a/drivers/gpu/drm/udl/udl_gem.c +++ b/drivers/gpu/drm/udl/udl_gem.c @@ -100,13 +100,12 @@ int udl_drm_gem_mmap(struct file *filp, struct vm_area_struct *vma) return ret; } -int udl_gem_fault(struct vm_fault *vmf) +vm_fault_t udl_gem_fault(struct vm_fault *vmf) { struct vm_area_struct *vma = vmf->vma; struct udl_gem_object *obj = to_udl_bo(vma->vm_private_data); struct page *page; unsigned int page_offset; - int ret = 0; page_offset = (vmf->address - vma->vm_start) >> PAGE_SHIFT; @@ -114,17 +113,7 @@ int udl_gem_fault(struct vm_fault *vmf) return VM_FAULT_SIGBUS; page = obj->pages[page_offset]; - ret = vm_insert_page(vma, vmf->address, page); - switch (ret) { - case -EAGAIN: - case 0: - case -ERESTARTSYS: - return VM_FAULT_NOPAGE; - case -ENOMEM: - return VM_FAULT_OOM; - default: - return VM_FAULT_SIGBUS; - } + return vmf_insert_page(vma, vmf->address, page); } int udl_gem_get_pages(struct udl_gem_object *obj) -- 1.9.1
Powered by blists - more mailing lists