unregister_adapter_interrupt – unregister adapter interrupt handler Synopsis void unregister_adapter_interrupt(struct airq_struct *airq); Arguments airq pointer to adapter interrupt descriptor Author Cornelia Huck <cornelia.huck [at] de.ibm.com> Author. Copyright
unqueue_me – Remove the futex_q from its futex_hash_bucket Synopsis int unqueue_me(struct futex_q *q); Arguments q The futex_q to unqueue Description The q->lock_ptr must not be held by the caller. A call to unqueue_me must be paired with exactly one earlier call to queue_me. Return 1 – if the futex_q was still queued (and we removed…
unmap_mapping_range – unmap the portion of all mmaps in the specified address_space corresponding to the specified page range in the underlying file. Synopsis void unmap_mapping_range(struct address_space *mapping, loff_t const holebegin, loff_t const holelen, int even_cows); Arguments mapping the address space containing mmaps to be unmapped. holebegin byte in first page to unmap, relative to the…
unmap_kernel_range_noflush – unmap kernel VM area Synopsis void unmap_kernel_range_noflush(unsigned long addr, unsigned long size); Arguments addr start of the VM area to unmap size size of the VM area to unmap Description Unmap PFN_UP(size) pages at addr. The VM area addr and size specify should have been allocated using get_vm_area and its friends. Note This…
unmap_kernel_range – unmap kernel VM area and flush cache and TLB Synopsis void unmap_kernel_range(unsigned long addr, unsigned long size); Arguments addr start of the VM area to unmap size size of the VM area to unmap Description Similar to unmap_kernel_range_noflush but flushes vcache before the unmapping and tlb after. Copyright
unlock_two_nondirectories – release locks from lock_two_nondirectories Synopsis void unlock_two_nondirectories(struct inode *inode1, struct inode *inode2); Arguments inode1 first inode to unlock inode2 second inode to unlock Copyright
unlock_sock_fast – complement of lock_sock_fast Synopsis void unlock_sock_fast(struct sock *sk, bool slow); Arguments sk socket slow slow mode Description fast unlock socket for user context. If slow mode is on, we call regular release_sock Copyright
unlock_page – unlock a locked page Synopsis void unlock_page(struct page *page); Arguments page the page Description Unlocks the page and wakes up sleepers in ___wait_on_page_locked. Also wakes sleepers in wait_on_page_writeback because the wakeup mechanism between PageLocked pages and PageWriteback pages is shared. But that’s OK – sleepers in wait_on_page_writeback just go back to sleep. The…
unlock_new_inode – clear the I_NEW state and wake up any waiters Synopsis void unlock_new_inode(struct inode *inode); Arguments inode new inode to unlock Description Called when the inode is fully initialised to clear the new state of the inode and wake up anyone waiting for the inode to finish initialisation. Copyright
typedef_journal_t – The journal_t maintains all of the journaling state information for a single filesystem. Synopsis typedef journal_t; Description journal_t is linked to from the fs superblock structure. We use the journal_t to keep track of all outstanding transaction activity on the filesystem, and to manage the state of the log writing process. This is…
typedef_handle_t – The handle_t type represents a single atomic update being performed by some process. Synopsis typedef handle_t; Description All filesystem modifications made by the process go through this handle. Recursive operations (such as quota operations) are gathered into a single update. The buffer credits field is used to account for journaled buffers being modified…
try_to_writeback_inodes_sb_nr – try to start writeback if none underway Synopsis bool try_to_writeback_inodes_sb_nr(struct super_block * sb, unsigned long nr, enum wb_reason reason); Arguments sb the superblock nr the number of pages to write reason the reason of writeback Description Invoke writeback_inodes_sb_nr if no writeback is currently underway. Returns 1 if writeback was started, 0 if not. Copyright
try_to_writeback_inodes_sb – try to start writeback if none underway Synopsis bool try_to_writeback_inodes_sb(struct super_block * sb, enum wb_reason reason); Arguments sb the superblock reason reason why some writeback work was initiated Description Implement by try_to_writeback_inodes_sb_nr Returns 1 if writeback was started, 0 if not. Copyright
try_to_release_page – release old fs-specific metadata on a page Synopsis int try_to_release_page(struct page *page, gfp_t gfp_mask); Arguments page the page which the kernel is trying to free gfp_mask memory allocation flags (and I/O mode) Description The address_space is to try to release any data against the page (presumably at page->private). If the release was successful,…
truncate_setsize – update inode and pagecache for a new file size Synopsis void truncate_setsize(struct inode *inode, loff_t newsize); Arguments inode inode newsize new file size Description truncate_setsize updates i_size and performs pagecache truncation (if necessary) to newsize. It will be typically be called from the filesystem’s setattr function when ATTR_SIZE is passed in. Must be…
truncate_pagecache_range – unmap and remove pagecache that is hole-punched Synopsis void truncate_pagecache_range(struct inode *inode, loff_t lstart, loff_t lend); Arguments inode inode lstart offset of beginning of hole lend offset of last byte of hole Description This function should typically be called before the filesystem releases resources associated with the freed range (eg. deallocates blocks). This…
truncate_pagecache – unmap and remove pagecache that has been truncated Synopsis void truncate_pagecache(struct inode *inode, loff_t newsize); Arguments inode inode newsize new file size Description inode’s new i_size must already be written before truncate_pagecache is called. This function should typically be called before the filesystem releases resources associated with the freed range (eg. deallocates blocks)….
truncate_inode_pages_range – truncate range of pages specified by start & end byte offsets Synopsis void truncate_inode_pages_range(struct address_space *mapping, loff_t lstart, loff_t lend); Arguments mapping mapping to truncate lstart offset from which to truncate lend offset to which to truncate (inclusive) Description Truncate the page cache, removing the pages that are between specified offsets (and zeroing…
truncate_inode_pages_final – truncate *all* pages before inode dies Synopsis void truncate_inode_pages_final(struct address_space *mapping); Arguments mapping mapping to truncate Description Called under (and serialized by) inode->i_mutex. Filesystems have to use this in the .evict_inode path to inform the VM that this is the final truncate and the inode is going away. Copyright
truncate_inode_pages – truncate *all* the pages from an offset Synopsis void truncate_inode_pages(struct address_space *mapping, loff_t lstart); Arguments mapping mapping to truncate lstart offset from which to truncate Description Called under (and serialised by) inode->i_mutex. Note When this function returns, there can be a page in the process of deletion (inside __delete_from_page_cache) in the specified range….