2022-07-30 12:42:11

by Colin Ian King

[permalink] [raw]
Subject: [PATCH] drm/i915/userptr: remove redundation assignment to variable ret

Variable ret is assigned a value that is never read; it is either
being re-assigned during the following while-loop or after the loop.
The assignmnt is redundant and can be removed.

Cleans up clang scan build warning:
drivers/gpu/drm/i915/gem/i915_gem_userptr.c:295:11: warning: Although
the value stored to 'ret' is used in the enclosing expression, the
value is never actually read from 'ret' [deadcode.DeadStores]

Signed-off-by: Colin Ian King <[email protected]>
---
drivers/gpu/drm/i915/gem/i915_gem_userptr.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/gem/i915_gem_userptr.c b/drivers/gpu/drm/i915/gem/i915_gem_userptr.c
index 8423df021b71..075aef875a07 100644
--- a/drivers/gpu/drm/i915/gem/i915_gem_userptr.c
+++ b/drivers/gpu/drm/i915/gem/i915_gem_userptr.c
@@ -292,7 +292,7 @@ int i915_gem_object_userptr_submit_init(struct drm_i915_gem_object *obj)
if (!i915_gem_object_is_readonly(obj))
gup_flags |= FOLL_WRITE;

- pinned = ret = 0;
+ pinned = 0;
while (pinned < num_pages) {
ret = pin_user_pages_fast(obj->userptr.ptr + pinned * PAGE_SIZE,
num_pages - pinned, gup_flags,
--
2.35.3



Subject: Re: [PATCH] drm/i915/userptr: remove redundation assignment to variable ret

On Sat, Jul 30, 2022 at 01:23:42PM +0100, Colin Ian King wrote:
>Variable ret is assigned a value that is never read; it is either
>being re-assigned during the following while-loop or after the loop.
>The assignmnt is redundant and can be removed.
>
>Cleans up clang scan build warning:
>drivers/gpu/drm/i915/gem/i915_gem_userptr.c:295:11: warning: Although
>the value stored to 'ret' is used in the enclosing expression, the
>value is never actually read from 'ret' [deadcode.DeadStores]
>
>Signed-off-by: Colin Ian King <[email protected]>
>---
> drivers/gpu/drm/i915/gem/i915_gem_userptr.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
>diff --git a/drivers/gpu/drm/i915/gem/i915_gem_userptr.c b/drivers/gpu/drm/i915/gem/i915_gem_userptr.c
>index 8423df021b71..075aef875a07 100644
>--- a/drivers/gpu/drm/i915/gem/i915_gem_userptr.c
>+++ b/drivers/gpu/drm/i915/gem/i915_gem_userptr.c
>@@ -292,7 +292,7 @@ int i915_gem_object_userptr_submit_init(struct drm_i915_gem_object *obj)
> if (!i915_gem_object_is_readonly(obj))
> gup_flags |= FOLL_WRITE;
>
>- pinned = ret = 0;
>+ pinned = 0;
> while (pinned < num_pages) {
> ret = pin_user_pages_fast(obj->userptr.ptr + pinned * PAGE_SIZE,
> num_pages - pinned, gup_flags,

LGTM.
Reviewed-by: Niranjana Vishwanathapura <[email protected]>

>--
>2.35.3
>