Hi Ramalingam,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on drm-intel/for-linux-next]
[also build test ERROR on drm/drm-next drm-tip/drm-tip next-20220318]
[cannot apply to v5.17-rc8]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    
https://github.com/0day-ci/linux/commits/Ramalingam-C/drm-i915-ttm-Evict-and-restore-of-compressed-object/20220320-044242
base:   git://anongit.freedesktop.org/drm-intel for-linux-next
config: i386-allyesconfig 
(https://download.01.org/0day-ci/archive/20220320/202203200912.4mqfvte9-...@intel.com/config)
compiler: gcc-9 (Ubuntu 9.4.0-1ubuntu1~20.04) 9.4.0
reproduce (this is a W=1 build):
        # 
https://github.com/0day-ci/linux/commit/afd58bdbf43437bf72ff2313776c3036ebf99a11
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review 
Ramalingam-C/drm-i915-ttm-Evict-and-restore-of-compressed-object/20220320-044242
        git checkout afd58bdbf43437bf72ff2313776c3036ebf99a11
        # save the config file to linux build tree
        mkdir build_dir
        make W=1 O=build_dir ARCH=i386 SHELL=/bin/bash

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <l...@intel.com>

All errors (new ones prefixed by >>):

   In file included from include/linux/kernel.h:29,
                    from arch/x86/include/asm/percpu.h:27,
                    from arch/x86/include/asm/current.h:6,
                    from arch/x86/include/asm/processor.h:17,
                    from arch/x86/include/asm/kvm_para.h:5,
                    from arch/x86/include/asm/hypervisor.h:37,
                    from drivers/gpu/drm/i915/i915_drv.h:35,
                    from drivers/gpu/drm/i915/gt/intel_migrate.c:6:
   drivers/gpu/drm/i915/gt/selftest_migrate.c: In function 'clear':
>> include/linux/kern_levels.h:5:18: error: format '%lu' expects argument of 
>> type 'long unsigned int', but argument 4 has type 'unsigned int' 
>> [-Werror=format=]
       5 | #define KERN_SOH "\001"  /* ASCII Start Of Header */
         |                  ^~~~~~
   include/linux/printk.h:418:11: note: in definition of macro 
'printk_index_wrap'
     418 |   _p_func(_fmt, ##__VA_ARGS__);    \
         |           ^~~~
   include/linux/printk.h:489:2: note: in expansion of macro 'printk'
     489 |  printk(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
         |  ^~~~~~
   include/linux/kern_levels.h:11:18: note: in expansion of macro 'KERN_SOH'
      11 | #define KERN_ERR KERN_SOH "3" /* error conditions */
         |                  ^~~~~~~~
   include/linux/printk.h:489:9: note: in expansion of macro 'KERN_ERR'
     489 |  printk(KERN_ERR pr_fmt(fmt), ##__VA_ARGS__)
         |         ^~~~~~~~
   drivers/gpu/drm/i915/gt/selftest_migrate.c:403:6: note: in expansion of 
macro 'pr_err'
     403 |      pr_err("%ps ccs clearing failed, offset: %d/%lu\n",
         |      ^~~~~~
   In file included from drivers/gpu/drm/i915/gt/intel_migrate.c:1014:
   drivers/gpu/drm/i915/gt/selftest_migrate.c:403:52: note: format string is 
defined here
     403 |      pr_err("%ps ccs clearing failed, offset: %d/%lu\n",
         |                                                  ~~^
         |                                                    |
         |                                                    long unsigned int
         |                                                  %u
   drivers/gpu/drm/i915/gt/intel_migrate.c: In function 
'intel_context_copy_ccs':
>> drivers/gpu/drm/i915/gt/selftest_migrate.c:157:19: error: 'rq' is used 
>> uninitialized in this function [-Werror=uninitialized]
     157 |  offset += (u64)rq->engine->instance << 32;
         |                 ~~^~~~~~~~
   cc1: all warnings being treated as errors


vim +/rq +157 drivers/gpu/drm/i915/gt/selftest_migrate.c

   134  
   135  static int intel_context_copy_ccs(struct intel_context *ce,
   136                                    const struct i915_deps *deps,
   137                                    struct scatterlist *sg,
   138                                    enum i915_cache_level cache_level,
   139                                    bool write_to_ccs,
   140                                    struct i915_request **out)
   141  {
   142          u8 src_access = write_to_ccs ? DIRECT_ACCESS : INDIRECT_ACCESS;
   143          u8 dst_access = write_to_ccs ? INDIRECT_ACCESS : DIRECT_ACCESS;
   144          struct sgt_dma it = sg_sgt(sg);
   145          struct i915_request *rq;
   146          u32 offset;
   147          int err;
   148  
   149          GEM_BUG_ON(ce->vm != ce->engine->gt->migrate.context->vm);
   150          *out = NULL;
   151  
   152          GEM_BUG_ON(ce->ring->size < SZ_64K);
   153  
   154          offset = 0;
   155          if (HAS_64K_PAGES(ce->engine->i915))
   156                  offset = CHUNK_SZ;
 > 157          offset += (u64)rq->engine->instance << 32;
   158  
   159          do {
   160                  int len;
   161  
   162                  rq = i915_request_create(ce);
   163                  if (IS_ERR(rq)) {
   164                          err = PTR_ERR(rq);
   165                          goto out_ce;
   166                  }
   167  
   168                  if (deps) {
   169                          err = i915_request_await_deps(rq, deps);
   170                          if (err)
   171                                  goto out_rq;
   172  
   173                          if (rq->engine->emit_init_breadcrumb) {
   174                                  err = 
rq->engine->emit_init_breadcrumb(rq);
   175                                  if (err)
   176                                          goto out_rq;
   177                          }
   178  
   179                          deps = NULL;
   180                  }
   181  
   182                  /* The PTE updates + clear must not be interrupted. */
   183                  err = emit_no_arbitration(rq);
   184                  if (err)
   185                          goto out_rq;
   186  
   187                  len = emit_pte(rq, &it, cache_level, true, offset, 
CHUNK_SZ);
   188                  if (len <= 0) {
   189                          err = len;
   190                          goto out_rq;
   191                  }
   192  
   193                  err = rq->engine->emit_flush(rq, EMIT_INVALIDATE);
   194                  if (err)
   195                          goto out_rq;
   196  
   197                  err = emit_copy_ccs(rq, offset, dst_access,
   198                                      offset, src_access, len);
   199                  if (err)
   200                          goto out_rq;
   201  
   202                  err = rq->engine->emit_flush(rq, EMIT_INVALIDATE |
   203                                               MI_FLUSH_DW_CCS);
   204  
   205                  /* Arbitration is re-enabled between requests. */
   206  out_rq:
   207                  if (*out)
   208                          i915_request_put(*out);
   209                  *out = i915_request_get(rq);
   210                  i915_request_add(rq);
   211                  if (err || !it.sg || !sg_dma_len(it.sg))
   212                          break;
   213  
   214                  cond_resched();
   215          } while (1);
   216  
   217  out_ce:
   218          return err;
   219  }
   220  

-- 
0-DAY CI Kernel Test Service
https://01.org/lkp

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