Missing linux/mm.h

Will fix it in the coming patch.

Christophe

Le 11/12/2018 à 22:55, kbuild test robot a écrit :
tree:   https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git 
next-test
head:   13fd174be1903cc069bb73b0d53a0420b8f6d778
commit: 3a0f466ce2402cc090c97ccc1285508f688d8a8e [70/71] powerpc: Implement 
CONFIG_DEBUG_VIRTUAL
config: powerpc-ps3_petitboot_nfs_defconfig (attached as .config)
compiler: powerpc64-linux-gnu-gcc (Debian 7.2.0-11) 7.2.0
reproduce:
         wget 
https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O 
~/bin/make.cross
         chmod +x ~/bin/make.cross
         git checkout 3a0f466ce2402cc090c97ccc1285508f688d8a8e
         # save the attached .config to linux build tree
         GCC_VERSION=7.2.0 make.cross ARCH=powerpc

All warnings (new ones prefixed by >>):

    In file included from arch/powerpc/include/asm/page.h:339:0,
                     from arch/powerpc/include/asm/thread_info.h:29,
                     from include/linux/thread_info.h:38,
                     from include/asm-generic/preempt.h:5,
                     from ./arch/powerpc/include/generated/asm/preempt.h:1,
                     from include/linux/preempt.h:81,
                     from include/linux/spinlock.h:51,
                     from include/linux/seqlock.h:36,
                     from include/linux/time.h:6,
                     from include/linux/jiffies.h:9,
                     from drivers/net/loopback.c:32:
    arch/powerpc/include/asm/io.h: In function 'page_to_phys':
    include/asm-generic/memory_model.h:64:14: error: implicit declaration of 
function 'page_to_section'; did you mean '__nr_to_section'? 
[-Werror=implicit-function-declaration]
      int __sec = page_to_section(__pg);   \
                  ^
    include/asm-generic/memory_model.h:81:21: note: in expansion of macro 
'__page_to_pfn'
     #define page_to_pfn __page_to_pfn
                         ^~~~~~~~~~~~~
arch/powerpc/include/asm/io.h:835:22: note: in expansion of macro 'page_to_pfn'
      unsigned long pfn = page_to_pfn(page);
                          ^~~~~~~~~~~
    In file included from include/linux/scatterlist.h:8:0,
                     from include/linux/dma-mapping.h:11,
                     from include/linux/skbuff.h:34,
                     from include/net/net_namespace.h:36,
                     from include/linux/inet.h:46,
                     from drivers/net/loopback.c:46:
    include/linux/mm.h: At top level:
    include/linux/mm.h:1121:29: error: conflicting types for 'page_to_section'
     static inline unsigned long page_to_section(const struct page *page)
                                 ^~~~~~~~~~~~~~~
    In file included from arch/powerpc/include/asm/page.h:339:0,
                     from arch/powerpc/include/asm/thread_info.h:29,
                     from include/linux/thread_info.h:38,
                     from include/asm-generic/preempt.h:5,
                     from ./arch/powerpc/include/generated/asm/preempt.h:1,
                     from include/linux/preempt.h:81,
                     from include/linux/spinlock.h:51,
                     from include/linux/seqlock.h:36,
                     from include/linux/time.h:6,
                     from include/linux/jiffies.h:9,
                     from drivers/net/loopback.c:32:
    include/asm-generic/memory_model.h:64:14: note: previous implicit 
declaration of 'page_to_section' was here
      int __sec = page_to_section(__pg);   \
                  ^
    include/asm-generic/memory_model.h:81:21: note: in expansion of macro 
'__page_to_pfn'
     #define page_to_pfn __page_to_pfn
                         ^~~~~~~~~~~~~
arch/powerpc/include/asm/io.h:835:22: note: in expansion of macro 'page_to_pfn'
      unsigned long pfn = page_to_pfn(page);
                          ^~~~~~~~~~~
    cc1: some warnings being treated as errors
--
    In file included from arch/powerpc/include/asm/page.h:339:0,
                     from arch/powerpc/include/asm/book3s/64/mmu.h:5,
                     from arch/powerpc/include/asm/mmu.h:328,
                     from arch/powerpc/include/asm/lppaca.h:36,
                     from arch/powerpc/include/asm/paca.h:21,
                     from arch/powerpc/include/asm/current.h:16,
                     from include/linux/mutex.h:14,
                     from include/linux/kernfs.h:13,
                     from include/linux/sysfs.h:16,
                     from include/linux/kobject.h:20,
                     from include/linux/device.h:16,
                     from drivers/of/irq.c:19:
    arch/powerpc/include/asm/io.h: In function 'page_to_phys':
    include/asm-generic/memory_model.h:64:14: error: implicit declaration of 
function 'page_to_section'; did you mean '__nr_to_section'? 
[-Werror=implicit-function-declaration]
      int __sec = page_to_section(__pg);   \
                  ^
    include/asm-generic/memory_model.h:81:21: note: in expansion of macro 
'__page_to_pfn'
     #define page_to_pfn __page_to_pfn
                         ^~~~~~~~~~~~~
arch/powerpc/include/asm/io.h:835:22: note: in expansion of macro 'page_to_pfn'
      unsigned long pfn = page_to_pfn(page);
                          ^~~~~~~~~~~
    cc1: some warnings being treated as errors
--
    In file included from arch/powerpc/include/asm/page.h:339:0,
                     from arch/powerpc/include/asm/thread_info.h:29,
                     from include/linux/thread_info.h:38,
                     from include/asm-generic/preempt.h:5,
                     from ./arch/powerpc/include/generated/asm/preempt.h:1,
                     from include/linux/preempt.h:81,
                     from include/linux/hardirq.h:5,
                     from arch/powerpc/kernel/mce.c:25:
    arch/powerpc/include/asm/io.h: In function 'page_to_phys':
    include/asm-generic/memory_model.h:64:14: error: implicit declaration of 
function 'page_to_section'; did you mean '__nr_to_section'? 
[-Werror=implicit-function-declaration]
      int __sec = page_to_section(__pg);   \
                  ^
    include/asm-generic/memory_model.h:81:21: note: in expansion of macro 
'__page_to_pfn'
     #define page_to_pfn __page_to_pfn
                         ^~~~~~~~~~~~~
arch/powerpc/include/asm/io.h:835:22: note: in expansion of macro 'page_to_pfn'
      unsigned long pfn = page_to_pfn(page);
                          ^~~~~~~~~~~
    In file included from include/linux/pid_namespace.h:7:0,
                     from include/linux/ptrace.h:10,
                     from arch/powerpc/kernel/mce.c:27:
    include/linux/mm.h: At top level:
    include/linux/mm.h:1121:29: error: conflicting types for 'page_to_section'
     static inline unsigned long page_to_section(const struct page *page)
                                 ^~~~~~~~~~~~~~~
    In file included from arch/powerpc/include/asm/page.h:339:0,
                     from arch/powerpc/include/asm/thread_info.h:29,
                     from include/linux/thread_info.h:38,
                     from include/asm-generic/preempt.h:5,
                     from ./arch/powerpc/include/generated/asm/preempt.h:1,
                     from include/linux/preempt.h:81,
                     from include/linux/hardirq.h:5,
                     from arch/powerpc/kernel/mce.c:25:
    include/asm-generic/memory_model.h:64:14: note: previous implicit 
declaration of 'page_to_section' was here
      int __sec = page_to_section(__pg);   \
                  ^
    include/asm-generic/memory_model.h:81:21: note: in expansion of macro 
'__page_to_pfn'
     #define page_to_pfn __page_to_pfn
                         ^~~~~~~~~~~~~
arch/powerpc/include/asm/io.h:835:22: note: in expansion of macro 'page_to_pfn'
      unsigned long pfn = page_to_pfn(page);
                          ^~~~~~~~~~~
    cc1: all warnings being treated as errors
--
    In file included from arch/powerpc/include/asm/page.h:339:0,
                     from arch/powerpc/include/asm/book3s/64/mmu.h:5,
                     from arch/powerpc/include/asm/mmu.h:328,
                     from arch/powerpc/include/asm/lppaca.h:36,
                     from arch/powerpc/include/asm/paca.h:21,
                     from arch/powerpc/include/asm/current.h:16,
                     from include/linux/sched.h:12,
                     from arch/powerpc/kernel/cputable.c:14:
    arch/powerpc/include/asm/io.h: In function 'page_to_phys':
    include/asm-generic/memory_model.h:64:14: error: implicit declaration of 
function 'page_to_section'; did you mean '__nr_to_section'? 
[-Werror=implicit-function-declaration]
      int __sec = page_to_section(__pg);   \
                  ^
    include/asm-generic/memory_model.h:81:21: note: in expansion of macro 
'__page_to_pfn'
     #define page_to_pfn __page_to_pfn
                         ^~~~~~~~~~~~~
arch/powerpc/include/asm/io.h:835:22: note: in expansion of macro 'page_to_pfn'
      unsigned long pfn = page_to_pfn(page);
                          ^~~~~~~~~~~
    cc1: all warnings being treated as errors

vim +/page_to_pfn +835 arch/powerpc/include/asm/io.h

    829 
    830 /*
    831  * Change "struct page" to physical address.
    832  */
    833 static inline phys_addr_t page_to_phys(struct page *page)
    834 {
  > 835              unsigned long pfn = page_to_pfn(page);
    836 
    837         WARN_ON(IS_ENABLED(CONFIG_DEBUG_VIRTUAL) && !pfn_valid(pfn));
    838 
    839         return PFN_PHYS(pfn);
    840 }
    841 

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