AuxXxilium/linux_dsm_epyc7002
1
0
Fork 0
mirror of https://github.com/AuxXxilium/linux_dsm_epyc7002.git synced 2024-12-28 11:18:45 +07:00
Code Issues Actions Packages Projects Releases Wiki Activity

drm/i915: Mark check_shadow_context_ppgtt as maybe unused

Browse Source 
When CONFIG_DRM_I915_DEBUG_GEM is not set, clang warns:

drivers/gpu/drm/i915/gvt/scheduler.c:884:1: warning: function
'check_shadow_context_ppgtt' is not needed and will not be emitted
[-Wunneeded-internal-declaration]
check_shadow_context_ppgtt(struct execlist_ring_context *c, struct
intel_vgpu_mm *m)
^
1 warning generated.

This warning is similar to -Wunused-function but rather than warning
that the function is completely unused, it warns that it is used in some
expression within the file but that expression will be evaluated to a
constant or be optimized away in the final assembly, essentially making
it appeared used but really isn't. Usually, this happens when a function
or variable is only used in sizeof, where it will appear to be used but
will be evaluated at compile time and not be required to be emitted.

In this case, the function is only used in GEM_BUG_ON, which is defined
as BUILD_BUG_ON_INVALID, which intentionally follows this pattern. To
fix this warning, add __maybe_unused to make it clear that this is
intentional depending on the configuration.

Fixes: bec3df930f ("drm/i915/gvt: Support PPGTT table load command")
Link: https://github.com/ClangBuiltLinux/linux/issues/1027
Signed-off-by: Nathan Chancellor <natechancellor@gmail.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20200516023545.3332334-1-natechancellor@gmail.com
(cherry picked from commit 993fa32eb3)
Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
This commit is contained in:
Nathan Chancellor 2020-05-15 19:35:45 -07:00 committed by Joonas Lahtinen
parent aa7b3df8fa
commit f159c647b1
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/gpu/drm/i915/gvt/scheduler.c
View File

@ -876,7 +876,7 @@ static void update_guest_pdps(struct intel_vgpu *vgpu,
gpa + i * 8, &pdp[7 - i], 4);
}
static bool
static __maybe_unused bool
check_shadow_context_ppgtt(struct execlist_ring_context *c, struct intel_vgpu_mm *m)
{
if (m->ppgtt_mm.root_entry_type == GTT_TYPE_PPGTT_ROOT_L4_ENTRY) {