Re: [PATCH v5 1/2] riscv: Get rid of riscv_pfn_base variable

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Hi Alexandre,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on robh/for-next]
[also build test WARNING on linus/master v6.2-rc5 next-20230127]
[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#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Alexandre-Ghiti/riscv-Get-rid-of-riscv_pfn_base-variable/20230125-161537
base:   https://git.kernel.org/pub/scm/linux/kernel/git/robh/linux.git for-next
patch link:    https://lore.kernel.org/r/20230125081214.1576313-2-alexghiti%40rivosinc.com
patch subject: [PATCH v5 1/2] riscv: Get rid of riscv_pfn_base variable
config: riscv-randconfig-r014-20230123 (https://download.01.org/0day-ci/archive/20230128/202301282132.46rygx9x-lkp@xxxxxxxxx/config)
compiler: clang version 16.0.0 (https://github.com/llvm/llvm-project 4196ca3278f78c6e19246e54ab0ecb364e37d66a)
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 riscv cross compiling tool for clang build
        # apt-get install binutils-riscv64-linux-gnu
        # https://github.com/intel-lab-lkp/linux/commit/90b21402dc8a7e6e36a62ad19c4969ff13fad168
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Alexandre-Ghiti/riscv-Get-rid-of-riscv_pfn_base-variable/20230125-161537
        git checkout 90b21402dc8a7e6e36a62ad19c4969ff13fad168
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=riscv olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=riscv SHELL=/bin/bash drivers/mmc/host/ mm/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@xxxxxxxxx>

All warnings (new ones prefixed by >>):

>> mm/debug.c:95:25: warning: format specifies type 'unsigned long' but the argument has type 'phys_addr_t' (aka 'unsigned long long') [-Wformat]
                           page_to_pgoff(page), page_to_pfn(page));
                                                ^~~~~~~~~~~~~~~~~
   include/linux/printk.h:510:37: note: expanded from macro 'pr_warn'
           printk(KERN_WARNING pr_fmt(fmt), ##__VA_ARGS__)
                                      ~~~     ^~~~~~~~~~~
   include/linux/printk.h:457:60: note: expanded from macro 'printk'
   #define printk(fmt, ...) printk_index_wrap(_printk, fmt, ##__VA_ARGS__)
                                                       ~~~    ^~~~~~~~~~~
   include/linux/printk.h:429:19: note: expanded from macro 'printk_index_wrap'
                   _p_func(_fmt, ##__VA_ARGS__);                           \
                           ~~~~    ^~~~~~~~~~~
   include/asm-generic/memory_model.h:52:21: note: expanded from macro 'page_to_pfn'
   #define page_to_pfn __page_to_pfn
                       ^
   include/asm-generic/memory_model.h:19:29: note: expanded from macro '__page_to_pfn'
   #define __page_to_pfn(page)     ((unsigned long)((page) - mem_map) + \
                                   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   1 warning generated.
--
>> mm/page_alloc.c:695:18: warning: format specifies type 'unsigned long' but the argument has type 'phys_addr_t' (aka 'unsigned long long') [-Wformat]
                   current->comm, page_to_pfn(page));
                                  ^~~~~~~~~~~~~~~~~
   include/linux/printk.h:480:35: note: expanded from macro 'pr_alert'
           printk(KERN_ALERT pr_fmt(fmt), ##__VA_ARGS__)
                                    ~~~     ^~~~~~~~~~~
   include/linux/printk.h:457:60: note: expanded from macro 'printk'
   #define printk(fmt, ...) printk_index_wrap(_printk, fmt, ##__VA_ARGS__)
                                                       ~~~    ^~~~~~~~~~~
   include/linux/printk.h:429:19: note: expanded from macro 'printk_index_wrap'
                   _p_func(_fmt, ##__VA_ARGS__);                           \
                           ~~~~    ^~~~~~~~~~~
   include/asm-generic/memory_model.h:52:21: note: expanded from macro 'page_to_pfn'
   #define page_to_pfn __page_to_pfn
                       ^
   include/asm-generic/memory_model.h:19:29: note: expanded from macro '__page_to_pfn'
   #define __page_to_pfn(page)     ((unsigned long)((page) - mem_map) + \
                                   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   1 warning generated.
--
>> mm/page_isolation.c:174:26: warning: comparison of distinct pointer types ('typeof (((unsigned long)((page) - mem_map) + (((phys_ram_base) >> (12))))) *' (aka 'unsigned long long *') and 'typeof (start_pfn) *' (aka 'unsigned long *')) [-Wcompare-distinct-pointer-types]
           check_unmovable_start = max(page_to_pfn(page), start_pfn);
                                   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/minmax.h:74:19: note: expanded from macro 'max'
   #define max(x, y)       __careful_cmp(x, y, >)
                           ^~~~~~~~~~~~~~~~~~~~~~
   include/linux/minmax.h:36:24: note: expanded from macro '__careful_cmp'
           __builtin_choose_expr(__safe_cmp(x, y), \
                                 ^~~~~~~~~~~~~~~~
   include/linux/minmax.h:26:4: note: expanded from macro '__safe_cmp'
                   (__typecheck(x, y) && __no_side_effects(x, y))
                    ^~~~~~~~~~~~~~~~~
   include/linux/minmax.h:20:28: note: expanded from macro '__typecheck'
           (!!(sizeof((typeof(x) *)1 == (typeof(y) *)1)))
                      ~~~~~~~~~~~~~~ ^  ~~~~~~~~~~~~~~
>> mm/page_isolation.c:175:24: warning: comparison of distinct pointer types ('typeof ((((((((unsigned long)((page) - mem_map) + (((phys_ram_base) >> (12))))) + 1)) + ((typeof (((((unsigned long)((page) - mem_map) + (((phys_ram_base) >> (12))))) + 1)))(((1UL << __builtin_choose_expr(((!!(sizeof ((typeof ((unsigned int)((21 - (12)))) *)1 == (typeof ((unsigned int)(11 - 1)) *)1))) && ((sizeof(int) == sizeof (*(8 ? ((void *)((long)((unsigned int)((21 - (12)))) * 0L)) : (int *)8))) && (sizeof(int) == sizeof (*(8 ? ((void *)((long)((unsigned int)(11 - 1)) * 0L)) : (int *)8))))), (((unsigned int)((21 - (12)))) < ((unsigned int)(11 - 1)) ? ((unsigned int)((21 - (12)))) : ((unsigned int)(11 - 1))), ({
       typeof ((unsigned int)((21 - (12)))) __UNIQUE_ID___x304 = ((unsigned int)((21 - (12))));
       typeof ((unsigned int)(11 - 1)) __UNIQUE_ID___y305 = ((unsigned int)(11 - 1));
       ((__UNIQUE_ID___x304) < (__UNIQUE_ID___y305) ? (__UNIQUE_ID___x304) : (__UNIQUE_ID___y305));
   }))))) - 1)) & ~((typeof (((((unsigned long)((page) - mem_map) + (((phys_ram_base) >> (12))))) + 1)))(((1UL << __builtin_choose_expr(((!!(sizeof ((typeof ((unsigned int)((21 - (12)))) *)1 == (typeof ((unsigned int)(11 - 1)) *)1))) && ((sizeof(int) == sizeof (*(8 ? ((void *)((long)((unsigned int)((21 - (12)))) * 0L)) : (int *)8))) && (sizeof(int) == sizeof (*(8 ? ((void *)((long)((unsigned int)(11 - 1)) * 0L)) : (int *)8))))), (((unsigned int)((21 - (12)))) < ((unsigned int)(11 - 1)) ? ((unsigned int)((21 - (12)))) : ((unsigned int)(11 - 1))), ({
       typeof ((unsigned int)((21 - (12)))) __UNIQUE_ID___x304 = ((unsigned int)((21 - (12))));
       typeof ((unsigned int)(11 - 1)) __UNIQUE_ID___y305 = ((unsigned int)(11 - 1));
       ((__UNIQUE_ID___x304) < (__UNIQUE_ID___y305) ? (__UNIQUE_ID___x304) : (__UNIQUE_ID___y305));
   }))))) - 1))) *' (aka 'unsigned long long *') and 'typeof (end_pfn) *' (aka 'unsigned long *')) [-Wcompare-distinct-pointer-types]
           check_unmovable_end = min(pageblock_end_pfn(page_to_pfn(page)),
                                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/minmax.h:67:19: note: expanded from macro 'min'
   #define min(x, y)       __careful_cmp(x, y, <)
                           ^~~~~~~~~~~~~~~~~~~~~~
   include/linux/minmax.h:36:24: note: expanded from macro '__careful_cmp'
           __builtin_choose_expr(__safe_cmp(x, y), \
                                 ^~~~~~~~~~~~~~~~
   include/linux/minmax.h:26:4: note: expanded from macro '__safe_cmp'
                   (__typecheck(x, y) && __no_side_effects(x, y))
                    ^~~~~~~~~~~~~~~~~
   include/linux/minmax.h:20:28: note: expanded from macro '__typecheck'
           (!!(sizeof((typeof(x) *)1 == (typeof(y) *)1)))
                      ~~~~~~~~~~~~~~ ^  ~~~~~~~~~~~~~~
   2 warnings generated.
--
>> drivers/mmc/host/usdhi6rol0.c:388:18: warning: format specifies type 'unsigned long' but the argument has type 'phys_addr_t' (aka 'unsigned long long') [-Wformat]
                   host->pg.page, page_to_pfn(host->pg.page), host->pg.mapped,
                                  ^~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/dev_printk.h:155:39: note: expanded from macro 'dev_dbg'
           dynamic_dev_dbg(dev, dev_fmt(fmt), ##__VA_ARGS__)
                                        ~~~     ^~~~~~~~~~~
   include/linux/dynamic_debug.h:273:19: note: expanded from macro 'dynamic_dev_dbg'
                              dev, fmt, ##__VA_ARGS__)
                                   ~~~    ^~~~~~~~~~~
   include/linux/dynamic_debug.h:249:59: note: expanded from macro '_dynamic_func_call'
           _dynamic_func_call_cls(_DPRINTK_CLASS_DFLT, fmt, func, ##__VA_ARGS__)
                                                                    ^~~~~~~~~~~
   note: (skipping 1 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all)
   include/linux/dynamic_debug.h:223:15: note: expanded from macro '__dynamic_func_call_cls'
                   func(&id, ##__VA_ARGS__);                       \
                               ^~~~~~~~~~~
   include/asm-generic/memory_model.h:52:21: note: expanded from macro 'page_to_pfn'
   #define page_to_pfn __page_to_pfn
                       ^
   include/asm-generic/memory_model.h:19:29: note: expanded from macro '__page_to_pfn'
   #define __page_to_pfn(page)     ((unsigned long)((page) - mem_map) + \
                                   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   drivers/mmc/host/usdhi6rol0.c:511:18: warning: format specifies type 'unsigned long' but the argument has type 'phys_addr_t' (aka 'unsigned long long') [-Wformat]
                   host->pg.page, page_to_pfn(host->pg.page), host->pg.mapped,
                                  ^~~~~~~~~~~~~~~~~~~~~~~~~~
   include/linux/dev_printk.h:155:39: note: expanded from macro 'dev_dbg'
           dynamic_dev_dbg(dev, dev_fmt(fmt), ##__VA_ARGS__)
                                        ~~~     ^~~~~~~~~~~
   include/linux/dynamic_debug.h:273:19: note: expanded from macro 'dynamic_dev_dbg'
                              dev, fmt, ##__VA_ARGS__)
                                   ~~~    ^~~~~~~~~~~
   include/linux/dynamic_debug.h:249:59: note: expanded from macro '_dynamic_func_call'
           _dynamic_func_call_cls(_DPRINTK_CLASS_DFLT, fmt, func, ##__VA_ARGS__)
                                                                    ^~~~~~~~~~~
   note: (skipping 1 expansions in backtrace; use -fmacro-backtrace-limit=0 to see all)
   include/linux/dynamic_debug.h:223:15: note: expanded from macro '__dynamic_func_call_cls'
                   func(&id, ##__VA_ARGS__);                       \
                               ^~~~~~~~~~~
   include/asm-generic/memory_model.h:52:21: note: expanded from macro 'page_to_pfn'
   #define page_to_pfn __page_to_pfn
                       ^
   include/asm-generic/memory_model.h:19:29: note: expanded from macro '__page_to_pfn'
   #define __page_to_pfn(page)     ((unsigned long)((page) - mem_map) + \
                                   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   2 warnings generated.


vim +174 mm/page_isolation.c

b48d8a8e5ce53e Zi Yan                    2022-05-12  141  
844fbae63e468e Zi Yan                    2022-05-12  142  /*
844fbae63e468e Zi Yan                    2022-05-12  143   * This function set pageblock migratetype to isolate if no unmovable page is
844fbae63e468e Zi Yan                    2022-05-12  144   * present in [start_pfn, end_pfn). The pageblock must intersect with
844fbae63e468e Zi Yan                    2022-05-12  145   * [start_pfn, end_pfn).
844fbae63e468e Zi Yan                    2022-05-12  146   */
844fbae63e468e Zi Yan                    2022-05-12  147  static int set_migratetype_isolate(struct page *page, int migratetype, int isol_flags,
844fbae63e468e Zi Yan                    2022-05-12  148  			unsigned long start_pfn, unsigned long end_pfn)
ee6f509c327401 Minchan Kim               2012-07-31  149  {
1c31cb493c3144 David Hildenbrand         2020-10-13  150  	struct zone *zone = page_zone(page);
1c31cb493c3144 David Hildenbrand         2020-10-13  151  	struct page *unmovable;
3f9903b9ca5e98 David Hildenbrand         2020-01-30  152  	unsigned long flags;
844fbae63e468e Zi Yan                    2022-05-12  153  	unsigned long check_unmovable_start, check_unmovable_end;
ee6f509c327401 Minchan Kim               2012-07-31  154  
ee6f509c327401 Minchan Kim               2012-07-31  155  	spin_lock_irqsave(&zone->lock, flags);
ee6f509c327401 Minchan Kim               2012-07-31  156  
2c7452a075d4db Mike Kravetz              2018-04-05  157  	/*
2c7452a075d4db Mike Kravetz              2018-04-05  158  	 * We assume the caller intended to SET migrate type to isolate.
2c7452a075d4db Mike Kravetz              2018-04-05  159  	 * If it is already set, then someone else must have raced and
51030a53d81e30 David Hildenbrand         2020-10-13  160  	 * set it before us.
2c7452a075d4db Mike Kravetz              2018-04-05  161  	 */
51030a53d81e30 David Hildenbrand         2020-10-13  162  	if (is_migrate_isolate_page(page)) {
51030a53d81e30 David Hildenbrand         2020-10-13  163  		spin_unlock_irqrestore(&zone->lock, flags);
51030a53d81e30 David Hildenbrand         2020-10-13  164  		return -EBUSY;
51030a53d81e30 David Hildenbrand         2020-10-13  165  	}
2c7452a075d4db Mike Kravetz              2018-04-05  166  
ee6f509c327401 Minchan Kim               2012-07-31  167  	/*
ee6f509c327401 Minchan Kim               2012-07-31  168  	 * FIXME: Now, memory hotplug doesn't call shrink_slab() by itself.
ee6f509c327401 Minchan Kim               2012-07-31  169  	 * We just check MOVABLE pages.
844fbae63e468e Zi Yan                    2022-05-12  170  	 *
844fbae63e468e Zi Yan                    2022-05-12  171  	 * Pass the intersection of [start_pfn, end_pfn) and the page's pageblock
844fbae63e468e Zi Yan                    2022-05-12  172  	 * to avoid redundant checks.
ee6f509c327401 Minchan Kim               2012-07-31  173  	 */
844fbae63e468e Zi Yan                    2022-05-12 @174  	check_unmovable_start = max(page_to_pfn(page), start_pfn);
4f9bc69ac5ce34 Kefeng Wang               2022-09-07 @175  	check_unmovable_end = min(pageblock_end_pfn(page_to_pfn(page)),
844fbae63e468e Zi Yan                    2022-05-12  176  				  end_pfn);
844fbae63e468e Zi Yan                    2022-05-12  177  
844fbae63e468e Zi Yan                    2022-05-12  178  	unmovable = has_unmovable_pages(check_unmovable_start, check_unmovable_end,
844fbae63e468e Zi Yan                    2022-05-12  179  			migratetype, isol_flags);
4a55c0474a92d5 Qian Cai                  2020-01-30  180  	if (!unmovable) {
2139cbe627b891 Bartlomiej Zolnierkiewicz 2012-10-08  181  		unsigned long nr_pages;
4da2ce250f9860 Michal Hocko              2017-11-15  182  		int mt = get_pageblock_migratetype(page);
2139cbe627b891 Bartlomiej Zolnierkiewicz 2012-10-08  183  
a458431e176ddb Bartlomiej Zolnierkiewicz 2013-01-04  184  		set_pageblock_migratetype(page, MIGRATE_ISOLATE);
ad53f92eb416d8 Joonsoo Kim               2014-11-13  185  		zone->nr_isolate_pageblock++;
02aa0cdd72483c Vlastimil Babka           2017-05-08  186  		nr_pages = move_freepages_block(zone, page, MIGRATE_ISOLATE,
02aa0cdd72483c Vlastimil Babka           2017-05-08  187  									NULL);
2139cbe627b891 Bartlomiej Zolnierkiewicz 2012-10-08  188  
4da2ce250f9860 Michal Hocko              2017-11-15  189  		__mod_zone_freepage_state(zone, -nr_pages, mt);
1c31cb493c3144 David Hildenbrand         2020-10-13  190  		spin_unlock_irqrestore(&zone->lock, flags);
1c31cb493c3144 David Hildenbrand         2020-10-13  191  		return 0;
ee6f509c327401 Minchan Kim               2012-07-31  192  	}
ee6f509c327401 Minchan Kim               2012-07-31  193  
ee6f509c327401 Minchan Kim               2012-07-31  194  	spin_unlock_irqrestore(&zone->lock, flags);
1c31cb493c3144 David Hildenbrand         2020-10-13  195  	if (isol_flags & REPORT_FAILURE) {
4a55c0474a92d5 Qian Cai                  2020-01-30  196  		/*
3d680bdf60a5ba Qian Cai                  2020-01-30  197  		 * printk() with zone->lock held will likely trigger a
4a55c0474a92d5 Qian Cai                  2020-01-30  198  		 * lockdep splat, so defer it here.
4a55c0474a92d5 Qian Cai                  2020-01-30  199  		 */
4a55c0474a92d5 Qian Cai                  2020-01-30  200  		dump_page(unmovable, "unmovable page");
3d680bdf60a5ba Qian Cai                  2020-01-30  201  	}
4a55c0474a92d5 Qian Cai                  2020-01-30  202  
1c31cb493c3144 David Hildenbrand         2020-10-13  203  	return -EBUSY;
ee6f509c327401 Minchan Kim               2012-07-31  204  }
ee6f509c327401 Minchan Kim               2012-07-31  205  

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