kstat_irqs_cpu – Get the statistics for an interrupt on a cpu Synopsis unsigned int kstat_irqs_cpu(unsigned int irq, int cpu); Arguments irq The interrupt number cpu The cpu number Description Returns the sum of interrupt counts on cpu since boot for irq. The caller must ensure that the interrupt is not removed concurrently. Authors Thomas Gleixner…
kstat_irqs – Get the statistics for an interrupt Synopsis unsigned int kstat_irqs(unsigned int irq); Arguments irq The interrupt number Description Returns the sum of interrupt counts on all cpus since boot for irq. The caller must ensure that the interrupt is not removed concurrently. Authors Thomas Gleixner <tglx [at] linutronix.de> Author. Ingo Molnar <mingo [at]…
ksize – get the actual amount of memory allocated for a given object Synopsis size_t ksize(const void *objp); Arguments objp Pointer to the object Description kmalloc may internally round up allocations and return more memory than requested. ksize can be used to determine the actual amount of memory allocated. The caller may use this additional…
kmemdup – duplicate region of memory Synopsis void *kmemdup(const void *src, size_t len, gfp_t gfp); Arguments src memory region to duplicate len memory region length gfp GFP mask to use Copyright
kmem_cache_free – Deallocate an object Synopsis void kmem_cache_free(struct kmem_cache *cachep, void *objp); Arguments cachep The cache the allocation was from. objp The previously allocated object. Description Free an object which was previously allocated from this cache. Copyright
kmem_cache_alloc_node – Allocate an object on the specified node Synopsis void *kmem_cache_alloc_node(struct kmem_cache *cachep, gfp_t flags, int nodeid); Arguments cachep The cache to allocate from. flags See kmalloc. nodeid node number of the target node. Description Identical to kmem_cache_alloc but it will allocate memory on the given node, which can improve the performance for cpu…
kmem_cache_alloc – Allocate an object Synopsis void *kmem_cache_alloc(struct kmem_cache *cachep, gfp_t flags); Arguments cachep The cache to allocate from. flags See kmalloc. Description Allocate an object from this cache. The flags are only relevant if the cache has no available objects. Copyright
kmalloc_array – allocate memory for an array. Synopsis void *kmalloc_array(size_t n, size_t size, gfp_t flags); Arguments n number of elements. size element size. flags the type of memory to allocate (see kmalloc). Copyright
kmalloc – allocate memory Synopsis void *kmalloc(size_t size, gfp_t flags); Arguments size how many bytes of memory are required. flags the type of memory to allocate. Description kmalloc is the normal method of allocating memory for objects smaller than page size in the kernel. The flags argument may be one of: GFP_USER – Allocate memory…
kgdb_skipexception – (optional) exit kgdb_handle_exception early Synopsis int kgdb_skipexception(int exception, struct pt_regs *regs); Arguments exception Exception vector number regs Current struct pt_regs. Description On some architectures it is required to skip a breakpoint exception when it occurs after a breakpoint has been removed. This can be implemented in the architecture specific portion of kgdb. Author…
kgdb_roundup_cpus – Get other CPUs into a holding pattern Synopsis void kgdb_roundup_cpus(unsigned long flags); Arguments flags Current IRQ state Description On SMP systems, we need to get the attention of the other CPUs and get them into a known state. This should do what is needed to get the other CPUs to call kgdb_wait. Note…
kgdb_breakpoint – compiled in breakpoint Synopsis void kgdb_breakpoint(void); Arguments void no arguments Description This will be implemented as a static inline per architecture. This function is called by the kgdb core to execute an architecture specific trap to cause kgdb to enter the exception processing. Author Jason Wessel <jason.wessel [at] windriver.com> Author. Copyright
kgdb_arch_set_pc – Generic call back to the program counter Synopsis void kgdb_arch_set_pc(struct pt_regs *regs, unsigned long pc); Arguments regs Current struct pt_regs. pc The new value for the program counter Description This function handles updating the program counter and requires an architecture specific implementation. Author Jason Wessel <jason.wessel [at] windriver.com> Author. Copyright
kgdb_arch_late – Perform any architecture specific initalization. Synopsis void kgdb_arch_late(void); Arguments void no arguments Description This function will handle the late initalization of any architecture specific callbacks. This is an optional function for handling things like late initialization of hw breakpoints. The default implementation does nothing. Author Jason Wessel <jason.wessel [at] windriver.com> Author. Copyright
kgdb_arch_init – Perform any architecture specific initalization. Synopsis int kgdb_arch_init(void); Arguments void no arguments Description This function will handle the initalization of any architecture specific callbacks. Author Jason Wessel <jason.wessel [at] windriver.com> Author. Copyright
kgdb_arch_handle_exception – Handle architecture specific GDB packets. Synopsis int kgdb_arch_handle_exception(int vector, int signo, int err_code, char *remcom_in_buffer, char *remcom_out_buffer, struct pt_regs *regs); Arguments vector The error vector of the exception that happened. signo The signal number of the exception that happened. err_code The error code of the exception that happened. remcom_in_buffer The buffer of the…
kgdb_arch_exit – Perform any architecture specific uninitalization. Synopsis void kgdb_arch_exit(void); Arguments void no arguments Description This function will handle the uninitalization of any architecture specific callbacks, for dynamic registration and unregistration. Author Jason Wessel <jason.wessel [at] windriver.com> Author. Copyright
kfree_skb – free an sk_buff Synopsis void kfree_skb(struct sk_buff *skb); Arguments skb buffer to free Description Drop a reference to the buffer and free it if the usage count has hit zero. Copyright
kfree_const – conditionally free memory Synopsis void kfree_const(const void *x); Arguments x pointer to the memory Description Function calls kfree only if x is not in .rodata section. Copyright
kfree – free previously allocated memory Synopsis void kfree(const void *objp); Arguments objp pointer returned by kmalloc. Description If objp is NULL, no operation is performed. Don’t free memory not originally allocated by kmalloc or you will run into trouble. Copyright