9 Kernel routines

8,468 pages in section 9.

A395
B597
C544
D740
E141
F164
G151
H112
I710
J70
K209
L110
M433
N292
O62
P540
Q6
R443
S1611
T136
U339
V293
W112
X42
Y2
Z40

fa

fail fail points
fault_in_user_writeable Fault in user address and verify RW access

fb

fb_add_videomode adds videomode entry to modelist
fb_alloc_cmap allocate a colormap
fb_copy_cmap copy a colormap
fb_dealloc_cmap deallocate a colormap
fb_default_cmap get default colormap
fb_delete_videomode removed videomode entry from modelist
fb_destroy_modelist destroy modelist
fb_find_best_mode find best matching videomode
fb_find_mode finds a valid video mode
fb_find_nearest_mode find closest videomode
fb_get_options get kernel boot parameters
fb_invert_cmaps invert all defaults colormaps
fb_match_mode find a videomode which exactly matches the timings in var
fb_mode_is_equal compare 2 videomodes
fb_set_cmap set the colormap
fb_set_suspend low level driver signals suspend
fb_try_mode test a video mode
fb_var_to_videomode convert fb_var_screeninfo to fb_videomode
fb_videomode_to_modelist convert mode array to mode list
fb_videomode_to_var convert fb_videomode to fb_var_screeninfo

fc

fc_block_scsi_eh Block SCSI eh thread for blocked fc_rport
fc_get_event_number Obtain the next sequential FC event number
fc_host_post_event called to post an even on an fc_host.
fc_host_post_vendor_event called to post a vendor unique event on an fc_host
fc_remote_port_add notify fc transport of the existence of a remote FC port.
fc_remote_port_delete notifies the fc transport that a remote port is no longer in existence.
fc_remote_port_rolechg notifies the fc transport that the roles on a remote may have changed.
fc_remove_host called to terminate any fc_transport-related elements for a scsi host.
fc_vport_create Admin App or LLDD requests creation of a vport
fc_vport_terminate Admin App or LLDD requests termination of a vport
fcntl_getlease Enquire what lease is currently active
fcntl_setlease sets a lease on an open file

fd

fdt_pinctrl helper functions for FDT pinmux controller drivers
fdt_pinctrl_configure helper functions for FDT pinmux controller drivers
fdt_pinctrl_configure_by_name helper functions for FDT pinmux controller drivers
fdt_pinctrl_configure_tree helper functions for FDT pinmux controller drivers
fdt_pinctrl_register helper functions for FDT pinmux controller drivers

fe

feedcomp Multiply the input by the ratio of current velocity to the feed rate.
fetch fetch data from user-space

ff

ffs find first set bit in word
ffz find first zero bit in word

fi

file_permission check for additional access rights to a given file
file_update_time update mtime and ctime time
filemap_fault read in file data for page fault handling
filemap_fdatawait wait for all under-writeback pages to complete
filemap_fdatawait_range wait for writeback to complete
filemap_flush mostly a non-blocking flush
filemap_nopage read in file data for page fault handling
filemap_write_and_wait_range write out & wait on a file range
filp_open open file and return file pointer
filter_kalman Unidimensional Kalman filter, also known as linear quadratic estimation (LQE)
find_busiest_group Returns the busiest group within the sched_domain if there is an imbalance. If there isn't an imbalance, and the user has opted for power-savings, it returns a group whose CPUs can be put to idle by rebalancing those tasks elsewhere, if such a group exists.
find_first_bit find the first set bit in a memory region
find_first_zero_bit find the first zero bit in a memory region
find_get_entries_tag find and return entries that match tag
find_get_entry find and get a page cache entry
find_get_page find and get a page reference
find_get_pages_contig gang contiguous pagecache lookup
find_get_pages_tag find and return pages that match tag
find_inode_nowait find an inode in the inode cache
find_inode_number check for dentry with name
find_lock_entry locate, pin and lock a page cache entry
find_lock_page locate, pin and lock a pagecache page
find_max_pfn_with_active_regions Find the maximum PFN registered
find_min_pfn_with_active_regions Find the minimum PFN registered
find_next_best_node find the next node that should appear in a given node's fallback list
find_next_bit find the first set bit in a memory region
find_next_zero_bit find the first zero bit in a memory region
find_or_create_page locate or add a pagecache page
find_trylock_page find and lock a page
finish_wait clean up after waiting in a queue
firmware firmware image loading and management
firmware_get firmware image loading and management
firmware_put firmware image loading and management
firmware_register firmware image loading and management
firmware_unregister firmware image loading and management
fix_small_imbalance Calculate the minor imbalance that exists amongst the groups of a sched_domain, during load balancing.
fixup_owner Post lock pi_state and corner case management

fl

flipflop D type flip-flop
flock_lock_file_wait Apply a FLOCK-style lock to a file
flock_lock_inode_wait Apply a FLOCK-style lock to a file
fls find last set bit in word
fls64 find last set bit in a 64-bit word
flush_delayed_work wait for a dwork to finish executing the last queueing
flush_delayed_work_sync wait for a dwork to finish
flush_kthread_work flush a kthread_work
flush_kthread_worker flush all current works on a kthread_worker
flush_scheduled_work ensure that any scheduled work has run to completion.
flush_work wait for a work to finish executing the last queueing instance
flush_work_sync wait until a work has finished execution
flush_workqueue ensure that any scheduled work has run to completion.

fo

follow_pfn look up PFN at a user virtual address
for_each_dtlb_entry Iterate over free (non-wired) DTLB entries
for_each_itlb_entry Iterate over free (non-wired) ITLB entries

fp

fpu_kern facility to use the FPU in the kernel
fpu_kern_alloc_ctx facility to use the FPU in the kernel
fpu_kern_enter facility to use the FPU in the kernel
fpu_kern_free_ctx facility to use the FPU in the kernel
fpu_kern_leave facility to use the FPU in the kernel
fpu_kern_thread facility to use the FPU in the kernel

fr

frame_aligned Check whether the byte size is aligned to frames
frames_to_bytes Unit conversion of the size from frames to bytes
FREE kernel memory management routines
free kernel memory management routines
free_area_init_nodes Initialise all pg_data_t and zone data
free_bootmem_with_active_regions Call memblock_free_early_nid for each active range
free_dma free a reserved system DMA channel
free_irq free an interrupt allocated with request_irq
free_mntarg functions provided as part of the kernel mount interface
free_netdev free network device
free_percpu free previously allocated percpu memory
free_percpu_irq free an interrupt allocated with request_percpu_irq
free_rs Free the rs control structure, if it is no longer used
free_unr kernel unit number allocator
freeenv kernel environment variable functions
freeze_bdev - lock a filesystem and force it into a consistent state
freeze_super lock the filesystem and force it into a consistent state
freq_reg_info get regulatory information for the given frequency

fs

fsl_add_inb_buffer Add buffer to the MPC85xx inbound message queue
fsl_add_outb_message Add message to the MPC85xx outbound message queue
fsl_close_inb_mbox Shut down MPC85xx inbound mailbox
fsl_close_outb_mbox Shut down MPC85xx outbound mailbox
fsl_get_inb_message Fetch inbound message from the MPC85xx message unit
fsl_local_config_read Generate a MPC85xx local config space read
fsl_local_config_write Generate a MPC85xx local config space write
fsl_open_inb_mbox Initialize MPC85xx inbound mailbox
fsl_open_outb_mbox Initialize MPC85xx outbound mailbox
fsl_rio_config_read Generate a MPC85xx read maintenance transaction
fsl_rio_config_write Generate a MPC85xx write maintenance transaction
fsl_rio_dbell_handler MPC85xx doorbell interrupt handler
fsl_rio_doorbell_init MPC85xx doorbell interface init
fsl_rio_doorbell_send Send a MPC85xx doorbell message
fsl_rio_port_write_handler MPC85xx port write interrupt handler
fsl_rio_port_write_init MPC85xx port write interface init
fsl_rio_pw_enable enable/disable port-write interface init
fsl_rio_rx_handler MPC85xx inbound message interrupt handler
fsl_rio_setup Setup Freescale PowerPC RapidIO interface
fsl_rio_tx_handler MPC85xx outbound message interrupt handler

fu

fubyte fetch data from user-space
fueptr fetch data from user-space
fueword fetch data from user-space
fueword32 fetch data from user-space
fueword64 fetch data from user-space
fuibyte fetch data from user-space
fuiword fetch data from user-space
fulong fetch data from user-space
fusion_exit Perform driver unload cleanup.
fusion_init Fusion MPT base driver initialization routine.
fuswintr fetch data from user-space
fusword fetch data from user-space
futex_lock_pi_atomic Atomic work required to acquire a pi aware futex
futex_proxy_trylock_atomic Attempt an atomic lock for the top waiter
futex_requeue Requeue waiters from uaddr1 to uaddr2
futex_top_waiter Return the highest priority waiter on a futex
futex_wait_queue_me queue_me and wait for wakeup, timeout, or signal
futex_wait_requeue_pi Wait on uaddr and take uaddr2
futex_wait_setup Prepare to wait on a futex
fuulong fetch data from user-space
fuword fetch data from user-space
fuword16 fetch data from user-space
fuword32 fetch data from user-space
fuword64 fetch data from user-space

© 2026 All Tuner Labs · Made with ❤️ in Poblenou, Barcelona

llms.txt Sections

Manual pages are their authors', as Arch Linux, Debian, FreeBSD, OpenBSD and macOS ship them.