list_empty_careful – tests whether a list is empty and not being modified Synopsis int list_empty_careful(const struct list_head *head); Arguments head the list to test Description tests whether a list is empty _and_ checks that no other CPU might be in the process of modifying either member (next or prev) Note using list_empty_careful without synchronization can…
list_empty – tests whether a list is empty Synopsis int list_empty(const struct list_head *head); Arguments head the list to test. Copyright
list_del_init – deletes entry from list and reinitialize it. Synopsis void list_del_init(struct list_head *entry); Arguments entry the element to delete from the list. Copyright
list_cut_position – cut a list into two Synopsis void list_cut_position(struct list_head *list, struct list_head *head, struct list_head *entry); Arguments list a new list to add all removed entries head a list with entries entry an entry within head, could be the head itself and if so we won’t cut the list Description This helper moves…
list_add_tail – add a new entry Synopsis void list_add_tail(struct list_head *new, struct list_head *head); Arguments new new entry to be added head list head to add it before Description Insert a new entry before the specified head. This is useful for implementing queues. Copyright
list_add – add a new entry Synopsis void list_add(struct list_head *new, struct list_head *head); Arguments new new entry to be added head list head to add it after Description Insert a new entry after the specified head. This is good for implementing stacks. Copyright
lease_get_mtime – get the last modified time of an inode Synopsis void lease_get_mtime(struct inode *inode, struct timespec *time); Arguments inode the inode time pointer to a timespec which will contain the last modified time Description This is to force NFS clients to flush their caches for files with exclusive leases. The justification is that if…
kzalloc_node – allocate zeroed memory from a particular memory node. Synopsis void *kzalloc_node(size_t size, gfp_t flags, int node); Arguments size how many bytes of memory are required. flags the type of memory to allocate (see kmalloc). node memory node from which to allocate Copyright
kzalloc – allocate memory. The memory is set to zero. Synopsis void *kzalloc(size_t size, gfp_t flags); Arguments size how many bytes of memory are required. flags the type of memory to allocate (see kmalloc). Copyright
kstrtoull – convert a string to an unsigned long long Synopsis int kstrtoull(const char *s, unsigned int base, unsigned long long *res); Arguments s The start of the string. The string must be null-terminated, and may also include a single newline before its terminating null. The first character may also be a plus sign, but…
kstrtoul – convert a string to an unsigned long Synopsis int kstrtoul(const char *s, unsigned int base, unsigned long *res); Arguments s The start of the string. The string must be null-terminated, and may also include a single newline before its terminating null. The first character may also be a plus sign, but not a…
kstrtouint – convert a string to an unsigned int Synopsis int kstrtouint(const char *s, unsigned int base, unsigned int *res); Arguments s The start of the string. The string must be null-terminated, and may also include a single newline before its terminating null. The first character may also be a plus sign, but not a…
kstrtoll – convert a string to a long long Synopsis int kstrtoll(const char *s, unsigned int base, long long *res); Arguments s The start of the string. The string must be null-terminated, and may also include a single newline before its terminating null. The first character may also be a plus sign or a minus…
kstrtol – convert a string to a long Synopsis int kstrtol(const char *s, unsigned int base, long *res); Arguments s The start of the string. The string must be null-terminated, and may also include a single newline before its terminating null. The first character may also be a plus sign or a minus sign. base…
kstrtoint – convert a string to an int Synopsis int kstrtoint(const char *s, unsigned int base, int *res); Arguments s The start of the string. The string must be null-terminated, and may also include a single newline before its terminating null. The first character may also be a plus sign or a minus sign. base…
kstrtobool – convert common user inputs into boolean values Synopsis int kstrtobool(const char *s, bool *res); Arguments s input string res result Description This routine returns 0 iff the first character is one of ‘Yy1Nn0’, or [oO][NnFf] for “on” and “off”. Otherwise it will return -EINVAL. Value pointed to by res is updated upon finding…
kstrndup – allocate space for and copy an existing string Synopsis char *kstrndup(const char *s, size_t max, gfp_t gfp); Arguments s the string to duplicate max read at most max chars from s gfp the GFP mask used in the kmalloc call when allocating memory Copyright
kstrdup_const – conditionally duplicate an existing const string Synopsis const char *kstrdup_const(const char *s, gfp_t gfp); Arguments s the string to duplicate gfp the GFP mask used in the kmalloc call when allocating memory Description Function returns source string if it is in .rodata section otherwise it fallbacks to kstrdup. Strings allocated by kstrdup_const should…
kstrdup – allocate space for and copy an existing string Synopsis char *kstrdup(const char *s, gfp_t gfp); Arguments s the string to duplicate gfp the GFP mask used in the kmalloc call when allocating memory Copyright
kstat_irqs_usr – Get the statistics for an interrupt Synopsis unsigned int kstat_irqs_usr(unsigned int irq); Arguments irq The interrupt number Description Returns the sum of interrupt counts on all cpus since boot for irq. Contrary to kstat_irqs this can be called from any preemptible context. It’s protected against concurrent removal of an interrupt descriptor when sparse…