[intel-tdx:kvm-upstream-workaround 333/429] include/linux/memfile_notifier.h:87:57: error: type specifier missing, defaults to 'int'; ISO C99 and later do not support implicit int

From: kernel test robot
Date: Fri May 27 2022 - 07:30:59 EST

tree: https://github.com/intel/tdx.git kvm-upstream-workaround
head: 49c277ae966b45577acad5c6d98acba3d27d63af
commit: a46fd36366f3a53f0ea7385cdddef7d5e373edd0 [333/429] mm/shmem: Support memfile_notifier
config: hexagon-randconfig-r045-20220524 (https://download.01.org/0day-ci/archive/20220527/202205271916.7L8Eg9yk-lkp@xxxxxxxxx/config)
compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 134d7f9a4b97e9035150d970bd9e376043c4577e)
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
# https://github.com/intel/tdx/commit/a46fd36366f3a53f0ea7385cdddef7d5e373edd0
git remote add intel-tdx https://github.com/intel/tdx.git
git fetch --no-tags intel-tdx kvm-upstream-workaround
git checkout a46fd36366f3a53f0ea7385cdddef7d5e373edd0
# 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=hexagon SHELL=/bin/bash

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

All errors (new ones prefixed by >>):

In file included from drivers/char/mem.c:25:
In file included from include/linux/shmem_fs.h:12:
>> include/linux/memfile_notifier.h:87:57: error: type specifier missing, defaults to 'int'; ISO C99 and later do not support implicit int [-Wimplicit-int]
static int memfile_register_notifier(struct file *file, flags,
^
int
drivers/char/mem.c:95:13: warning: no previous prototype for function 'unxlate_dev_mem_ptr' [-Wmissing-prototypes]
void __weak unxlate_dev_mem_ptr(phys_addr_t phys, void *addr)
^
drivers/char/mem.c:94:29: note: expanded from macro 'unxlate_dev_mem_ptr'
#define unxlate_dev_mem_ptr unxlate_dev_mem_ptr
^
drivers/char/mem.c:95:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
void __weak unxlate_dev_mem_ptr(phys_addr_t phys, void *addr)
^
static
1 warning and 1 error generated.
--
In file included from drivers/gpu/drm/drm_gem_shmem_helper.c:10:
In file included from include/linux/shmem_fs.h:12:
>> include/linux/memfile_notifier.h:87:57: error: type specifier missing, defaults to 'int'; ISO C99 and later do not support implicit int [-Wimplicit-int]
static int memfile_register_notifier(struct file *file, flags,
^
int
1 error generated.
--
In file included from drivers/gpu/drm/vgem/vgem_drv.c:36:
In file included from include/linux/shmem_fs.h:12:
>> include/linux/memfile_notifier.h:87:57: error: type specifier missing, defaults to 'int'; ISO C99 and later do not support implicit int [-Wimplicit-int]
static int memfile_register_notifier(struct file *file, flags,
^
int
drivers/gpu/drm/vgem/vgem_drv.c:144:10: warning: shift count >= width of type [-Wshift-count-overflow]
DMA_BIT_MASK(64));
^~~~~~~~~~~~~~~~
include/linux/dma-mapping.h:76:54: note: expanded from macro 'DMA_BIT_MASK'
#define DMA_BIT_MASK(n) (((n) == 64) ? ~0ULL : ((1ULL<<(n))-1))
^ ~~~
1 warning and 1 error generated.
--
In file included from init/main.c:80:
In file included from include/linux/shmem_fs.h:12:
>> include/linux/memfile_notifier.h:87:57: error: type specifier missing, defaults to 'int'; ISO C99 and later do not support implicit int [-Wimplicit-int]
static int memfile_register_notifier(struct file *file, flags,
^
int
init/main.c:769:20: warning: no previous prototype for function 'arch_post_acpi_subsys_init' [-Wmissing-prototypes]
void __init __weak arch_post_acpi_subsys_init(void) { }
^
init/main.c:769:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
void __init __weak arch_post_acpi_subsys_init(void) { }
^
static
init/main.c:781:20: warning: no previous prototype for function 'mem_encrypt_init' [-Wmissing-prototypes]
void __init __weak mem_encrypt_init(void) { }
^
init/main.c:781:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
void __init __weak mem_encrypt_init(void) { }
^
static
init/main.c:783:20: warning: no previous prototype for function 'poking_init' [-Wmissing-prototypes]
void __init __weak poking_init(void) { }
^
init/main.c:783:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
void __init __weak poking_init(void) { }
^
static
3 warnings and 1 error generated.
--
In file included from kernel/fork.c:86:
In file included from include/linux/khugepaged.h:6:
In file included from include/linux/shmem_fs.h:12:
>> include/linux/memfile_notifier.h:87:57: error: type specifier missing, defaults to 'int'; ISO C99 and later do not support implicit int [-Wimplicit-int]
static int memfile_register_notifier(struct file *file, flags,
^
int
kernel/fork.c:163:13: warning: no previous prototype for function 'arch_release_task_struct' [-Wmissing-prototypes]
void __weak arch_release_task_struct(struct task_struct *tsk)
^
kernel/fork.c:163:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
void __weak arch_release_task_struct(struct task_struct *tsk)
^
static
kernel/fork.c:854:20: warning: no previous prototype for function 'arch_task_cache_init' [-Wmissing-prototypes]
void __init __weak arch_task_cache_init(void) { }
^
kernel/fork.c:854:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
void __init __weak arch_task_cache_init(void) { }
^
static
kernel/fork.c:949:12: warning: no previous prototype for function 'arch_dup_task_struct' [-Wmissing-prototypes]
int __weak arch_dup_task_struct(struct task_struct *dst,
^
kernel/fork.c:949:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
int __weak arch_dup_task_struct(struct task_struct *dst,
^
static
3 warnings and 1 error generated.
--
In file included from mm/shmem.c:37:
In file included from include/linux/khugepaged.h:6:
In file included from include/linux/shmem_fs.h:12:
>> include/linux/memfile_notifier.h:87:57: error: type specifier missing, defaults to 'int'; ISO C99 and later do not support implicit int [-Wimplicit-int]
static int memfile_register_notifier(struct file *file, flags,
^
int
In file included from mm/shmem.c:55:
include/linux/mman.h:158:9: warning: division by zero is undefined [-Wdivision-by-zero]
_calc_vm_trans(flags, MAP_SYNC, VM_SYNC ) |
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/mman.h:136:21: note: expanded from macro '_calc_vm_trans'
: ((x) & (bit1)) / ((bit1) / (bit2))))
^ ~~~~~~~~~~~~~~~~~
1 warning and 1 error generated.


vim +/int +87 include/linux/memfile_notifier.h

07b4263e3099f7 Chao Peng 2022-01-12 86
07b4263e3099f7 Chao Peng 2022-01-12 @87 static int memfile_register_notifier(struct file *file, flags,
07b4263e3099f7 Chao Peng 2022-01-12 88 struct memfile_notifier *notifier)
07b4263e3099f7 Chao Peng 2022-01-12 89 {
07b4263e3099f7 Chao Peng 2022-01-12 90 return -EOPNOTSUPP;
07b4263e3099f7 Chao Peng 2022-01-12 91 }
07b4263e3099f7 Chao Peng 2022-01-12 92

:::::: The code at line 87 was first introduced by commit
:::::: 07b4263e3099f776c35284155851f0e202b12a44 mm: Introduce memfile_notifier

:::::: TO: Chao Peng <chao.p.peng@xxxxxxxxxxxxxxx>
:::::: CC: Isaku Yamahata <isaku.yamahata@xxxxxxxxx>

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