read_cache_page_gfp – read into page cache, using specified page allocation flags. Synopsis struct page *read_cache_page_gfp(struct address_space *mapping, pgoff_t index, gfp_t gfp); Arguments mapping the page’s address_space index the page index gfp the page allocator flags to use if allocating Description This is the same as “read_mapping_page(mapping, index, NULL)”, but with any new page allocations done…
read_cache_page – read into page cache, fill it if needed Synopsis struct page *read_cache_page(struct address_space *mapping, pgoff_t index, int (*filler)(void *, struct page *), void *data); Arguments mapping the page’s address_space index the page index filler function to perform the read data first arg to filler(data, page) function, often left as NULL Description Read into…
read_bbt – [GENERIC] Read the bad block table starting from page Synopsis int read_bbt(struct mtd_info *mtd, uint8_t *buf, int page, int num, struct nand_bbt_descr *td, int offs); Arguments mtd MTD device structure buf temporary buffer page the starting page num the number of bbt descriptors to read td the bbt describtion table offs block number…
read_abs_bbts – [GENERIC] Read the bad block table(s) for all chips starting at a given page Synopsis void read_abs_bbts(struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_descr *td, struct nand_bbt_descr *md); Arguments mtd MTD device structure buf temporary buffer td descriptor for the bad block table md descriptor for the bad block table mirror Description Read the…
read_abs_bbt – [GENERIC] Read the bad block table starting at a given page Synopsis int read_abs_bbt(struct mtd_info *mtd, uint8_t *buf, struct nand_bbt_descr *td, int chip); Arguments mtd MTD device structure buf temporary buffer td descriptor for the bad block table chip read the table for a specific chip, -1 read all chips; applies only if…
rdev_get_id – get regulator ID Synopsis int rdev_get_id(struct regulator_dev *rdev); Arguments rdev regulator Authors Liam Girdwood <lrg [at] slimlogic.co.uk> Author. Mark Brown <broonie [at] opensource.wolfsonmicro.com> Wolfson Microelectronics, Author. Copyright
rdev_get_drvdata – get rdev regulator driver data Synopsis void *rdev_get_drvdata(struct regulator_dev *rdev); Arguments rdev regulator Description Get rdev regulator driver private data. This call can be used in the regulator driver context. Authors Liam Girdwood <lrg [at] slimlogic.co.uk> Author. Mark Brown <broonie [at] opensource.wolfsonmicro.com> Wolfson Microelectronics, Author. Copyright
queue_me – Enqueue the futex_q on the futex_hash_bucket Synopsis void queue_me(struct futex_q *q, struct futex_hash_bucket *hb); Arguments q The futex_q to enqueue hb The destination hash bucket Description The hb->lock must be held by the caller, and is released here. A call to queue_me is typically paired with exactly one call to unqueue_me. The exceptions…
pt_regs_to_gdb_regs – Convert ptrace regs to GDB regs Synopsis void pt_regs_to_gdb_regs(unsigned long *gdb_regs, struct pt_regs *regs); Arguments gdb_regs A pointer to hold the registers in the order GDB wants. regs The struct pt_regs of the current process. Description Convert the pt_regs in regs into the format for registers that GDB expects, stored in gdb_regs. Author…
pskb_trim_unique – remove end from a paged unique (not cloned) buffer Synopsis void pskb_trim_unique(struct sk_buff *skb, unsigned int len); Arguments skb buffer to alter len new length Description This is identical to pskb_trim except that the caller knows that the skb is not cloned so we should never get an error due to out- of-memory….
pskb_trim_rcsum – trim received skb and update checksum Synopsis int pskb_trim_rcsum(struct sk_buff *skb, unsigned int len); Arguments skb buffer to trim len new length Description This is exactly the same as pskb_trim except that it ensures the checksum of received packets are still valid after the operation. Copyright
pskb_put – add data to the tail of a potentially fragmented buffer Synopsis unsigned char *pskb_put(struct sk_buff *skb, struct sk_buff *tail, int len); Arguments skb start of the buffer to use tail tail fragment of the buffer to use len amount of data to add Description This function extends the used data area of the…
pskb_expand_head – reallocate header of sk_buff Synopsis int pskb_expand_head(struct sk_buff *skb, int nhead, int ntail, gfp_t gfp_mask); Arguments skb buffer to reallocate nhead room to add at head ntail room to add at tail gfp_mask allocation priority Description Expands (or creates identical copy, if nhead and ntail are zero) header of skb. sk_buff itself is…
proc_scsi_write – handle writes to /proc/scsi/scsi Synopsis ssize_t proc_scsi_write(struct file * file, const char __user * buf, size_t length, loff_t * ppos); Arguments file not used buf buffer to write length length of buf, at most PAGE_SIZE ppos not used Description this provides a legacy mechanism to add or remove devices by Host, Channel, ID, and Lun. To use, “echo ‘scsi add-single-device 0…
proc_scsi_open – glue function Synopsis int proc_scsi_open(struct inode *inode, struct file *file); Arguments inode not used file passed to single_open Description Associates proc_scsi_show with this file Authors James Bottomley <James.Bottomley [at] hansenpartnership.com> Author. Rob Landley <rob [at] landley.net> Author. Copyright
proc_print_scsidevice – return data about this host Synopsis int proc_print_scsidevice(struct device *dev, void *data); Arguments dev A scsi device data struct seq_file to output to. Description prints Host, Channel, Id, Lun, Vendor, Model, Rev, Type, and revision. Authors James Bottomley <James.Bottomley [at] hansenpartnership.com> Author. Rob Landley <rob [at] landley.net> Author. Copyright
proc_flush_task – Remove dcache entries for task from the /proc dcache. Synopsis void proc_flush_task(struct task_struct *task); Arguments task task that should be flushed. Description When flushing dentries from proc, one needs to flush them from global proc (proc_mnt) and from all the namespaces’ procs this task was seen in. This call is supposed to do…
proc_doulongvec_ms_jiffies_minmax – read a vector of millisecond values with min/max values Synopsis int proc_doulongvec_ms_jiffies_minmax(struct ctl_table *table, int write, void __user *buffer, size_t *lenp, loff_t *ppos); Arguments table the sysctl table write TRUE if this is a write to the sysctl file buffer the user buffer lenp the size of the user buffer ppos file position…
proc_doulongvec_minmax – read a vector of long integers with min/max values Synopsis int proc_doulongvec_minmax(struct ctl_table *table, int write, void __user *buffer, size_t *lenp, loff_t *ppos); Arguments table the sysctl table write TRUE if this is a write to the sysctl file buffer the user buffer lenp the size of the user buffer ppos file position…
proc_douintvec – read a vector of unsigned integers Synopsis int proc_douintvec(struct ctl_table *table, int write, void __user *buffer, size_t *lenp, loff_t *ppos); Arguments table the sysctl table write TRUE if this is a write to the sysctl file buffer the user buffer lenp the size of the user buffer ppos file position Description Reads/writes up…