GCC and clang warn (or error with CONFIG_WERROR=y / W=e) several times
when targeting 32-bit platforms along the lines of

  drivers/gpu/drm/xe/xe_lrc.c: In function 'dump_mi_command':
  drivers/gpu/drm/xe/xe_lrc.c:1921:40: error: format '%lx' expects argument of 
type 'long unsigned int', but argument 3 has type 'int' [-Werror=format=]
   1921 |                 drm_printf(p, "LRC[%#5lx]  =  [%#010x] MI_NOOP (%d 
dwords)\n",
        |                                    ~~~~^
        |                                        |
        |                                        long unsigned int
        |                                    %#5x
   1922 |                            dw - num_noop - start, inst_header, 
num_noop);
        |                            ~~~~~~~~~~~~~~~~~~~~~
        |                                          |
        |                                          int

  drivers/gpu/drm/xe/xe_lrc.c:1922:7: error: format specifies type 'unsigned 
long' but the argument has type '__ptrdiff_t' (aka 'int') [-Werror,-Wformat]
   1921 |                 drm_printf(p, "LRC[%#5lx]  =  [%#010x] MI_NOOP (%d 
dwords)\n",
        |                                    ~~~~~
        |                                    %#5tx
   1922 |                            dw - num_noop - start, inst_header, 
num_noop);
        |                            ^~~~~~~~~~~~~~~~~~~~~

Use the '%tx' specifier for printing pointer differences, which clears
up the warnings for 32-bit platforms while introducing no regressions
for 64-bit platforms.

Fixes: 65fcf19cb36b ("drm/xe: Include running dword offset in default_lrc 
dumps")
Signed-off-by: Nathan Chancellor <[email protected]>
---
 drivers/gpu/drm/xe/xe_lrc.c | 30 +++++++++++++++---------------
 1 file changed, 15 insertions(+), 15 deletions(-)

diff --git a/drivers/gpu/drm/xe/xe_lrc.c b/drivers/gpu/drm/xe/xe_lrc.c
index 7fb59386d1c5..31d57d8ec051 100644
--- a/drivers/gpu/drm/xe/xe_lrc.c
+++ b/drivers/gpu/drm/xe/xe_lrc.c
@@ -1918,17 +1918,17 @@ static int dump_mi_command(struct drm_printer *p,
                while (num_noop < remaining_dw &&
                       (*(++dw) & REG_GENMASK(31, 23)) == MI_NOOP)
                        num_noop++;
-               drm_printf(p, "LRC[%#5lx]  =  [%#010x] MI_NOOP (%d dwords)\n",
+               drm_printf(p, "LRC[%#5tx]  =  [%#010x] MI_NOOP (%d dwords)\n",
                           dw - num_noop - start, inst_header, num_noop);
                return num_noop;
 
        case MI_TOPOLOGY_FILTER:
-               drm_printf(p, "LRC[%#5lx]  =  [%#010x] MI_TOPOLOGY_FILTER\n",
+               drm_printf(p, "LRC[%#5tx]  =  [%#010x] MI_TOPOLOGY_FILTER\n",
                           dw - start, inst_header);
                return 1;
 
        case MI_BATCH_BUFFER_END:
-               drm_printf(p, "LRC[%#5lx]  =  [%#010x] MI_BATCH_BUFFER_END\n",
+               drm_printf(p, "LRC[%#5tx]  =  [%#010x] MI_BATCH_BUFFER_END\n",
                           dw - start, inst_header);
                /* Return 'remaining_dw' to consume the rest of the LRC */
                return remaining_dw;
@@ -1943,35 +1943,35 @@ static int dump_mi_command(struct drm_printer *p,
 
        switch (inst_header & MI_OPCODE) {
        case MI_LOAD_REGISTER_IMM:
-               drm_printf(p, "LRC[%#5lx]  =  [%#010x] MI_LOAD_REGISTER_IMM: %d 
regs\n",
+               drm_printf(p, "LRC[%#5tx]  =  [%#010x] MI_LOAD_REGISTER_IMM: %d 
regs\n",
                           dw - start, inst_header, (numdw - 1) / 2);
                for (int i = 1; i < numdw; i += 2)
-                       drm_printf(p, "LRC[%#5lx]  =  - %#6x = %#010x\n",
+                       drm_printf(p, "LRC[%#5tx]  =  - %#6x = %#010x\n",
                                   &dw[i] - start, dw[i], dw[i + 1]);
                return numdw;
 
        case MI_LOAD_REGISTER_MEM & MI_OPCODE:
-               drm_printf(p, "LRC[%#5lx]  =  [%#010x] MI_LOAD_REGISTER_MEM: 
%s%s\n",
+               drm_printf(p, "LRC[%#5tx]  =  [%#010x] MI_LOAD_REGISTER_MEM: 
%s%s\n",
                           dw - start, inst_header,
                           dw[0] & MI_LRI_LRM_CS_MMIO ? "CS_MMIO " : "",
                           dw[0] & MI_LRM_USE_GGTT ? "USE_GGTT " : "");
                if (numdw == 4)
-                       drm_printf(p, "LRC[%#5lx]  =  - %#6x = %#010llx\n",
+                       drm_printf(p, "LRC[%#5tx]  =  - %#6x = %#010llx\n",
                                   dw - start,
                                   dw[1], ((u64)(dw[3]) << 32 | (u64)(dw[2])));
                else
-                       drm_printf(p, "LRC[%#5lx]  =  - %*ph (%s)\n",
+                       drm_printf(p, "LRC[%#5tx]  =  - %*ph (%s)\n",
                                   dw - start, (int)sizeof(u32) * (numdw - 1),
                                   dw + 1, numdw < 4 ? "truncated" : 
"malformed");
                return numdw;
 
        case MI_FORCE_WAKEUP:
-               drm_printf(p, "LRC[%#5lx]  =  [%#010x] MI_FORCE_WAKEUP\n",
+               drm_printf(p, "LRC[%#5tx]  =  [%#010x] MI_FORCE_WAKEUP\n",
                           dw - start, inst_header);
                return numdw;
 
        default:
-               drm_printf(p, "LRC[%#5lx]  =  [%#010x] unknown MI opcode %#x, 
likely %d dwords\n",
+               drm_printf(p, "LRC[%#5tx]  =  [%#010x] unknown MI opcode %#x, 
likely %d dwords\n",
                           dw - start, inst_header, opcode, numdw);
                return numdw;
        }
@@ -1998,12 +1998,12 @@ static int dump_gfxpipe_command(struct drm_printer *p,
        switch (*dw & GFXPIPE_MATCH_MASK) {
 #define MATCH(cmd) \
        case cmd: \
-               drm_printf(p, "LRC[%#5lx]  =  [%#010x] " #cmd " (%d dwords)\n", 
\
+               drm_printf(p, "LRC[%#5tx]  =  [%#010x] " #cmd " (%d dwords)\n", 
\
                           dw - start, *dw, numdw); \
                return numdw
 #define MATCH3D(cmd) \
        case CMD_##cmd: \
-               drm_printf(p, "LRC[%#5lx]  =  [%#010x] " #cmd " (%d dwords)\n", 
\
+               drm_printf(p, "LRC[%#5tx]  =  [%#010x] " #cmd " (%d dwords)\n", 
\
                           dw - start, *dw, numdw); \
                return numdw
 
@@ -2136,7 +2136,7 @@ static int dump_gfxpipe_command(struct drm_printer *p,
        MATCH3D(3DSTATE_SLICE_TABLE_STATE_POINTER_2);
 
        default:
-               drm_printf(p, "LRC[%#5lx]  =  [%#010x] unknown GFXPIPE command 
(pipeline=%#x, opcode=%#x, subopcode=%#x), likely %d dwords\n",
+               drm_printf(p, "LRC[%#5tx]  =  [%#010x] unknown GFXPIPE command 
(pipeline=%#x, opcode=%#x, subopcode=%#x), likely %d dwords\n",
                           dw - start, *dw, pipeline, opcode, subopcode, numdw);
                return numdw;
        }
@@ -2162,7 +2162,7 @@ static int dump_gfx_state_command(struct drm_printer *p,
        MATCH(STATE_WRITE_INLINE);
 
        default:
-               drm_printf(p, "LRC[%#5lx]  =  [%#010x] unknown GFX_STATE 
command (opcode=%#x), likely %d dwords\n",
+               drm_printf(p, "LRC[%#5tx]  =  [%#010x] unknown GFX_STATE 
command (opcode=%#x), likely %d dwords\n",
                           dw - start, *dw, opcode, numdw);
                return numdw;
        }
@@ -2197,7 +2197,7 @@ void xe_lrc_dump_default(struct drm_printer *p,
                        num_dw = dump_gfx_state_command(p, gt, start, dw, 
remaining_dw);
                } else {
                        num_dw = min(instr_dw(*dw), remaining_dw);
-                       drm_printf(p, "LRC[%#5lx]  =  [%#10x] Unknown 
instruction of type %#x, likely %d dwords\n",
+                       drm_printf(p, "LRC[%#5tx]  =  [%#10x] Unknown 
instruction of type %#x, likely %d dwords\n",
                                   dw - start,
                                   *dw, REG_FIELD_GET(XE_INSTR_CMD_TYPE, *dw),
                                   num_dw);

---
base-commit: 1b12096b4bc5177d685ae098fdb90260ffd5db6b
change-id: 20260316-drm-xe-fix-32-bit-wformat-ptrdiff-a5f4f8483ec3

Best regards,
--  
Nathan Chancellor <[email protected]>

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