linux-mm.kvack.org archive mirror
 help / color / mirror / Atom feed
From: kernel test robot <lkp@intel.com>
To: Johannes Berg <johannes.berg@intel.com>
Cc: kbuild-all@lists.01.org, clang-built-linux@googlegroups.com,
	Linux Memory Management List <linux-mm@kvack.org>,
	Andrew Morton <akpm@linux-foundation.org>
Subject: [linux-next:master 12059/12188] kernel/gcov/clang.c:371:19: warning: incompatible integer to pointer conversion assigning to 'u64 *' (aka 'unsigned long long *') from 'int'
Date: Tue, 13 Apr 2021 01:20:11 +0800	[thread overview]
Message-ID: <202104130101.oJTybaAq-lkp@intel.com> (raw)

[-- Attachment #1: Type: text/plain, Size: 8332 bytes --]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   5df924d19629975d565da37eb7268c7bf4d491fe
commit: 3e09dd7690da513de18a1abdabaaf206fd9972e1 [12059/12188] gcov: use kvmalloc()
config: powerpc64-randconfig-r031-20210412 (attached as .config)
compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 9829f5e6b1bca9b61efc629770d28bb9014dec45)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # install powerpc64 cross compiling tool for clang build
        # apt-get install binutils-powerpc64-linux-gnu
        # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=3e09dd7690da513de18a1abdabaaf206fd9972e1
        git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
        git fetch --no-tags linux-next master
        git checkout 3e09dd7690da513de18a1abdabaaf206fd9972e1
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=powerpc64 

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

All warnings (new ones prefixed by >>):

   kernel/gcov/clang.c:88:6: warning: no previous prototype for function 'llvm_gcov_init' [-Wmissing-prototypes]
   void llvm_gcov_init(llvm_gcov_callback writeout, llvm_gcov_callback flush)
        ^
   kernel/gcov/clang.c:88:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void llvm_gcov_init(llvm_gcov_callback writeout, llvm_gcov_callback flush)
   ^
   static 
   kernel/gcov/clang.c:121:6: warning: no previous prototype for function 'llvm_gcda_start_file' [-Wmissing-prototypes]
   void llvm_gcda_start_file(const char *orig_filename, u32 version, u32 checksum)
        ^
   kernel/gcov/clang.c:121:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void llvm_gcda_start_file(const char *orig_filename, u32 version, u32 checksum)
   ^
   static 
   kernel/gcov/clang.c:150:6: warning: no previous prototype for function 'llvm_gcda_emit_function' [-Wmissing-prototypes]
   void llvm_gcda_emit_function(u32 ident, u32 func_checksum, u32 cfg_checksum)
        ^
   kernel/gcov/clang.c:150:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void llvm_gcda_emit_function(u32 ident, u32 func_checksum, u32 cfg_checksum)
   ^
   static 
   kernel/gcov/clang.c:166:6: warning: no previous prototype for function 'llvm_gcda_emit_arcs' [-Wmissing-prototypes]
   void llvm_gcda_emit_arcs(u32 num_counters, u64 *counters)
        ^
   kernel/gcov/clang.c:166:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void llvm_gcda_emit_arcs(u32 num_counters, u64 *counters)
   ^
   static 
   kernel/gcov/clang.c:176:6: warning: no previous prototype for function 'llvm_gcda_summary_info' [-Wmissing-prototypes]
   void llvm_gcda_summary_info(void)
        ^
   kernel/gcov/clang.c:176:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void llvm_gcda_summary_info(void)
   ^
   static 
   kernel/gcov/clang.c:181:6: warning: no previous prototype for function 'llvm_gcda_end_file' [-Wmissing-prototypes]
   void llvm_gcda_end_file(void)
        ^
   kernel/gcov/clang.c:181:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void llvm_gcda_end_file(void)
   ^
   static 
   kernel/gcov/clang.c:371:21: error: implicit declaration of function 'vmalloc' [-Werror,-Wimplicit-function-declaration]
           fn_dup->counters = vmalloc(cv_size);
                              ^
>> kernel/gcov/clang.c:371:19: warning: incompatible integer to pointer conversion assigning to 'u64 *' (aka 'unsigned long long *') from 'int' [-Wint-conversion]
           fn_dup->counters = vmalloc(cv_size);
                            ^ ~~~~~~~~~~~~~~~~
   7 warnings and 1 error generated.


vim +371 kernel/gcov/clang.c

e178a5beb36960 Greg Hackmann    2019-05-14  331  
60bcf728ee7c60 Nick Desaulniers 2021-03-24  332  #if CONFIG_CLANG_VERSION < 110000
e178a5beb36960 Greg Hackmann    2019-05-14  333  static struct gcov_fn_info *gcov_fn_info_dup(struct gcov_fn_info *fn)
e178a5beb36960 Greg Hackmann    2019-05-14  334  {
e178a5beb36960 Greg Hackmann    2019-05-14  335  	size_t cv_size; /* counter values size */
3e09dd7690da51 Johannes Berg    2021-04-12  336  	struct gcov_fn_info *fn_dup = kmemdup(fn, sizeof(*fn), GFP_KERNEL);
3e09dd7690da51 Johannes Berg    2021-04-12  337  
e178a5beb36960 Greg Hackmann    2019-05-14  338  	if (!fn_dup)
e178a5beb36960 Greg Hackmann    2019-05-14  339  		return NULL;
e178a5beb36960 Greg Hackmann    2019-05-14  340  	INIT_LIST_HEAD(&fn_dup->head);
e178a5beb36960 Greg Hackmann    2019-05-14  341  
e178a5beb36960 Greg Hackmann    2019-05-14  342  	fn_dup->function_name = kstrdup(fn->function_name, GFP_KERNEL);
e178a5beb36960 Greg Hackmann    2019-05-14  343  	if (!fn_dup->function_name)
e178a5beb36960 Greg Hackmann    2019-05-14  344  		goto err_name;
e178a5beb36960 Greg Hackmann    2019-05-14  345  
e178a5beb36960 Greg Hackmann    2019-05-14  346  	cv_size = fn->num_counters * sizeof(fn->counters[0]);
3e09dd7690da51 Johannes Berg    2021-04-12  347  	fn_dup->counters = kvmalloc(cv_size, GFP_KERNEL);
e178a5beb36960 Greg Hackmann    2019-05-14  348  	if (!fn_dup->counters)
e178a5beb36960 Greg Hackmann    2019-05-14  349  		goto err_counters;
e178a5beb36960 Greg Hackmann    2019-05-14  350  	memcpy(fn_dup->counters, fn->counters, cv_size);
e178a5beb36960 Greg Hackmann    2019-05-14  351  
e178a5beb36960 Greg Hackmann    2019-05-14  352  	return fn_dup;
e178a5beb36960 Greg Hackmann    2019-05-14  353  
e178a5beb36960 Greg Hackmann    2019-05-14  354  err_counters:
e178a5beb36960 Greg Hackmann    2019-05-14  355  	kfree(fn_dup->function_name);
e178a5beb36960 Greg Hackmann    2019-05-14  356  err_name:
e178a5beb36960 Greg Hackmann    2019-05-14  357  	kfree(fn_dup);
e178a5beb36960 Greg Hackmann    2019-05-14  358  	return NULL;
e178a5beb36960 Greg Hackmann    2019-05-14  359  }
60bcf728ee7c60 Nick Desaulniers 2021-03-24  360  #else
60bcf728ee7c60 Nick Desaulniers 2021-03-24  361  static struct gcov_fn_info *gcov_fn_info_dup(struct gcov_fn_info *fn)
60bcf728ee7c60 Nick Desaulniers 2021-03-24  362  {
60bcf728ee7c60 Nick Desaulniers 2021-03-24  363  	size_t cv_size; /* counter values size */
60bcf728ee7c60 Nick Desaulniers 2021-03-24  364  	struct gcov_fn_info *fn_dup = kmemdup(fn, sizeof(*fn),
60bcf728ee7c60 Nick Desaulniers 2021-03-24  365  			GFP_KERNEL);
60bcf728ee7c60 Nick Desaulniers 2021-03-24  366  	if (!fn_dup)
60bcf728ee7c60 Nick Desaulniers 2021-03-24  367  		return NULL;
60bcf728ee7c60 Nick Desaulniers 2021-03-24  368  	INIT_LIST_HEAD(&fn_dup->head);
60bcf728ee7c60 Nick Desaulniers 2021-03-24  369  
60bcf728ee7c60 Nick Desaulniers 2021-03-24  370  	cv_size = fn->num_counters * sizeof(fn->counters[0]);
60bcf728ee7c60 Nick Desaulniers 2021-03-24 @371  	fn_dup->counters = vmalloc(cv_size);
60bcf728ee7c60 Nick Desaulniers 2021-03-24  372  	if (!fn_dup->counters) {
60bcf728ee7c60 Nick Desaulniers 2021-03-24  373  		kfree(fn_dup);
60bcf728ee7c60 Nick Desaulniers 2021-03-24  374  		return NULL;
60bcf728ee7c60 Nick Desaulniers 2021-03-24  375  	}
60bcf728ee7c60 Nick Desaulniers 2021-03-24  376  
60bcf728ee7c60 Nick Desaulniers 2021-03-24  377  	memcpy(fn_dup->counters, fn->counters, cv_size);
60bcf728ee7c60 Nick Desaulniers 2021-03-24  378  
60bcf728ee7c60 Nick Desaulniers 2021-03-24  379  	return fn_dup;
60bcf728ee7c60 Nick Desaulniers 2021-03-24  380  }
60bcf728ee7c60 Nick Desaulniers 2021-03-24  381  #endif
e178a5beb36960 Greg Hackmann    2019-05-14  382  

:::::: The code at line 371 was first introduced by commit
:::::: 60bcf728ee7c60ac2a1f9a0eaceb3a7b3954cd2b gcov: fix clang-11+ support

:::::: TO: Nick Desaulniers <ndesaulniers@google.com>
:::::: CC: Linus Torvalds <torvalds@linux-foundation.org>

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

[-- Attachment #2: .config.gz --]
[-- Type: application/gzip, Size: 38010 bytes --]

                 reply	other threads:[~2021-04-12 17:20 UTC|newest]

Thread overview: [no followups] expand[flat|nested]  mbox.gz  Atom feed

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=202104130101.oJTybaAq-lkp@intel.com \
    --to=lkp@intel.com \
    --cc=akpm@linux-foundation.org \
    --cc=clang-built-linux@googlegroups.com \
    --cc=johannes.berg@intel.com \
    --cc=kbuild-all@lists.01.org \
    --cc=linux-mm@kvack.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).