Make error: implicit declaration of funtion

[michael-ford]

Hey there, trying to compile on galliumOS kernel 4.8.17 and getting the following make error - sorry I'm a bit of a C noob so not sure where to start. Suggestions?

make -C /lib/modules/4.8.17-galliumos/build M=/media/sd/Downloads/exfat-nofuse modules
make[1]: Entering directory '/usr/src/linux-headers-4.8.17-galliumos'
CC [M] /media/sd/Downloads/exfat-nofuse/exfat_core.o
CC [M] /media/sd/Downloads/exfat-nofuse/exfat_super.o
/media/sd/Downloads/exfat-nofuse/exfat_super.c: In function ‘exfat_create’:
/media/sd/Downloads/exfat-nofuse/exfat_super.c:751:47: error: implicit declaration of function ‘current_time’ [-Werror=implicit-function-declaration]
dir->i_ctime = dir->i_mtime = dir->i_atime = current_time(dir);
^
/media/sd/Downloads/exfat-nofuse/exfat_super.c:751:45: error: incompatible types when assigning to type ‘struct timespec’ from type ‘int’
dir->i_ctime = dir->i_mtime = dir->i_atime = current_time(dir);
^
/media/sd/Downloads/exfat-nofuse/exfat_super.c:765:51: error: incompatible types when assigning to type ‘struct timespec’ from type ‘int’
inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode);
^
/media/sd/Downloads/exfat-nofuse/exfat_super.c: In function ‘exfat_unlink’:
/media/sd/Downloads/exfat-nofuse/exfat_super.c:900:30: error: incompatible types when assigning to type ‘struct timespec’ from type ‘int’
dir->i_mtime = dir->i_atime = current_time(dir);
^
/media/sd/Downloads/exfat-nofuse/exfat_super.c:907:34: error: incompatible types when assigning to type ‘struct timespec’ from type ‘int’
inode->i_mtime = inode->i_atime = current_time(inode);
^
/media/sd/Downloads/exfat-nofuse/exfat_super.c: In function ‘exfat_symlink’:
/media/sd/Downloads/exfat-nofuse/exfat_super.c:957:45: error: incompatible types when assigning to type ‘struct timespec’ from type ‘int’
dir->i_ctime = dir->i_mtime = dir->i_atime = current_time(dir);
^
/media/sd/Downloads/exfat-nofuse/exfat_super.c:971:51: error: incompatible types when assigning to type ‘struct timespec’ from type ‘int’
inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode);
^
/media/sd/Downloads/exfat-nofuse/exfat_super.c: In function ‘exfat_mkdir’:
/media/sd/Downloads/exfat-nofuse/exfat_super.c:1021:45: error: incompatible types when assigning to type ‘struct timespec’ from type ‘int’
dir->i_ctime = dir->i_mtime = dir->i_atime = current_time(dir);
^
/media/sd/Downloads/exfat-nofuse/exfat_super.c:1036:51: error: incompatible types when assigning to type ‘struct timespec’ from type ‘int’
inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode);
^
/media/sd/Downloads/exfat-nofuse/exfat_super.c: In function ‘exfat_rmdir’:
/media/sd/Downloads/exfat-nofuse/exfat_super.c:1075:30: error: incompatible types when assigning to type ‘struct timespec’ from type ‘int’
dir->i_mtime = dir->i_atime = current_time(dir);
^
/media/sd/Downloads/exfat-nofuse/exfat_super.c:1083:34: error: incompatible types when assigning to type ‘struct timespec’ from type ‘int’
inode->i_mtime = inode->i_atime = current_time(inode);
^
/media/sd/Downloads/exfat-nofuse/exfat_super.c: In function ‘exfat_rename’:
/media/sd/Downloads/exfat-nofuse/exfat_super.c:1138:57: error: incompatible types when assigning to type ‘struct timespec’ from type ‘int’
new_dir->i_ctime = new_dir->i_mtime = new_dir->i_atime = current_time(new_dir);
^
/media/sd/Downloads/exfat-nofuse/exfat_super.c:1161:38: error: incompatible types when assigning to type ‘struct timespec’ from type ‘int’
old_dir->i_ctime = old_dir->i_mtime = current_time(old_dir);
^
/media/sd/Downloads/exfat-nofuse/exfat_super.c:1172:22: error: incompatible types when assigning to type ‘struct timespec’ from type ‘int’
new_inode->i_ctime = current_time(new_inode);
^
/media/sd/Downloads/exfat-nofuse/exfat_super.c: In function ‘exfat_cont_expand’:
/media/sd/Downloads/exfat-nofuse/exfat_super.c:1191:34: error: incompatible types when assigning to type ‘struct timespec’ from type ‘int’
inode->i_ctime = inode->i_mtime = current_time(inode);
^
/media/sd/Downloads/exfat-nofuse/exfat_super.c: In function ‘_exfat_truncate’:
/media/sd/Downloads/exfat-nofuse/exfat_super.c:1485:34: error: incompatible types when assigning to type ‘struct timespec’ from type ‘int’
inode->i_ctime = inode->i_mtime = current_time(inode);
^
/media/sd/Downloads/exfat-nofuse/exfat_super.c: In function ‘exfat_write_end’:
/media/sd/Downloads/exfat-nofuse/exfat_super.c:1681:35: error: incompatible types when assigning to type ‘struct timespec’ from type ‘int’
inode->i_mtime = inode->i_ctime = current_time(inode);
^
/media/sd/Downloads/exfat-nofuse/exfat_super.c: In function ‘exfat_read_root’:
/media/sd/Downloads/exfat-nofuse/exfat_super.c:2438:51: error: incompatible types when assigning to type ‘struct timespec’ from type ‘int’
inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode);
^
cc1: some warnings being treated as errors
scripts/Makefile.build:289: recipe for target '/media/sd/Downloads/exfat-nofuse/exfat_super.o' failed
make[2]: *** [/media/sd/Downloads/exfat-nofuse/exfat_super.o] Error 1
Makefile:1473: recipe for target 'module/media/sd/Downloads/exfat-nofuse' failed
make[1]: *** [module/media/sd/Downloads/exfat-nofuse] Error 2
make[1]: Leaving directory '/usr/src/linux-headers-4.8.17-galliumos'
Makefile:35: recipe for target 'all' failed
make: *** [all] Error 2

[YorkTsai2012]

Maybe CURRENT_TIME or current_kernel_time() can meet the requirement.