drm/i915/gvt: remove unused variable gma_bottom in command parser

Remove unused variable gma_bottom in scan_workload() and scan_wa_ctx().
commit be1da7070aea ("drm/i915/gvt: vGPU command scanner") introduces
gma_bottom in several functions to calculate the size of the command
buffer. However, some of them are set but actually unused.

When compiling the code with ccflags -Wunused-but-set-variable, gcc
throws warnings.

Remove unused variables to avoid the gcc warnings. Tested via compiling
the code with ccflags -Wunused-but-set-variable.

Fixes: be1da7070aea ("drm/i915/gvt: vGPU command scanner")
Suggested-by: Jani Nikula <jani.nikula@intel.com>
Cc: Zhenyu Wang <zhenyuw@linux.intel.com>
Cc: intel-gvt-dev@lists.freedesktop.org
Signed-off-by: Zhi Wang <zhi.a.wang@intel.com>
Reviewed-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230531020411.18987-1-zhi.a.wang@intel.com

diff --git a/drivers/gpu/drm/i915/gvt/cmd_parser.c b/drivers/gpu/drm/i915/gvt/cmd_parser.c
index 3c4ae1da0d41621935f640f6a25c0f31e2c7aa7f..05f9348b7a9d8ee7a11a2108e2f2439ddc7435ee 100644 (file)
--- a/drivers/gpu/drm/i915/gvt/cmd_parser.c
+++ b/drivers/gpu/drm/i915/gvt/cmd_parser.c
@@ -2833,7 +2833,7 @@ static int command_scan(struct parser_exec_state *s,
 
 static int scan_workload(struct intel_vgpu_workload *workload)
 {
-       unsigned long gma_head, gma_tail, gma_bottom;
+       unsigned long gma_head, gma_tail;
        struct parser_exec_state s;
        int ret = 0;
 
@@ -2843,7 +2843,6 @@ static int scan_workload(struct intel_vgpu_workload *workload)
 
        gma_head = workload->rb_start + workload->rb_head;
        gma_tail = workload->rb_start + workload->rb_tail;
-       gma_bottom = workload->rb_start +  _RING_CTL_BUF_SIZE(workload->rb_ctl);
 
        s.buf_type = RING_BUFFER_INSTRUCTION;
        s.buf_addr_type = GTT_BUFFER;
@@ -2874,7 +2873,7 @@ out:
 static int scan_wa_ctx(struct intel_shadow_wa_ctx *wa_ctx)
 {
 
-       unsigned long gma_head, gma_tail, gma_bottom, ring_size, ring_tail;
+       unsigned long gma_head, gma_tail, ring_size, ring_tail;
        struct parser_exec_state s;
        int ret = 0;
        struct intel_vgpu_workload *workload = container_of(wa_ctx,
@@ -2891,7 +2890,6 @@ static int scan_wa_ctx(struct intel_shadow_wa_ctx *wa_ctx)
                        PAGE_SIZE);
        gma_head = wa_ctx->indirect_ctx.guest_gma;
        gma_tail = wa_ctx->indirect_ctx.guest_gma + ring_tail;
-       gma_bottom = wa_ctx->indirect_ctx.guest_gma + ring_size;
 
        s.buf_type = RING_BUFFER_INSTRUCTION;
        s.buf_addr_type = GTT_BUFFER;