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8fc369ae38
The `COMEDI_SRF_FREE_SPRIV` flag in the `runflags` member of `struct comedi_subdevice` indicates that the memory pointed to by the `private` member can be automatically freed by the comedi core on subdevice clean-up (when the low-level comedi device is being "detached"). the flag doesn't really belong in `runflags`, but it was somewhere convenient to keep it without having to add a new member to the structure. Rather than access the `COMEDI_SRF_FREE_SPRIV` flag directly, use some new wrapper functions: * comedi_can_auto_free_spriv(s) - checks whether the subdevice's `s->private` points to memory that can be freed automatically. * comedi_set_spriv_auto_free(s) - marks the subdevice as having a `s->private` that points to memory that can be freed automatically. Export `comedi_set_spriv_auto_free()` for use by the low-level comedi driver modules, in particular the "amplc_dio200_common" module. Signed-off-by: Ian Abbott <abbotti@mev.co.uk> Reviewed-by: H Hartley Sweeten <hsweeten@visionengravers.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
68 lines
1.9 KiB
C
68 lines
1.9 KiB
C
#ifndef _COMEDI_INTERNAL_H
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#define _COMEDI_INTERNAL_H
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#include <linux/compiler.h>
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#include <linux/types.h>
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/*
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* various internal comedi stuff
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*/
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struct comedi_buf_map;
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struct comedi_devconfig;
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struct comedi_device;
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struct comedi_insn;
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struct comedi_rangeinfo;
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struct comedi_subdevice;
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struct device;
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int do_rangeinfo_ioctl(struct comedi_device *dev,
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struct comedi_rangeinfo __user *arg);
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struct comedi_device *comedi_alloc_board_minor(struct device *hardware_device);
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void comedi_release_hardware_device(struct device *hardware_device);
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int comedi_alloc_subdevice_minor(struct comedi_subdevice *s);
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void comedi_free_subdevice_minor(struct comedi_subdevice *s);
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int comedi_buf_alloc(struct comedi_device *dev, struct comedi_subdevice *s,
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unsigned long new_size);
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void comedi_buf_reset(struct comedi_subdevice *s);
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bool comedi_buf_is_mmapped(struct comedi_subdevice *s);
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void comedi_buf_map_get(struct comedi_buf_map *bm);
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int comedi_buf_map_put(struct comedi_buf_map *bm);
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struct comedi_buf_map *comedi_buf_map_from_subdev_get(
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struct comedi_subdevice *s);
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unsigned int comedi_buf_write_n_allocated(struct comedi_subdevice *s);
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void comedi_device_cancel_all(struct comedi_device *dev);
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bool comedi_can_auto_free_spriv(struct comedi_subdevice *s);
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extern unsigned int comedi_default_buf_size_kb;
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extern unsigned int comedi_default_buf_maxsize_kb;
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/* drivers.c */
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extern struct comedi_driver *comedi_drivers;
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extern struct mutex comedi_drivers_list_lock;
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int insn_inval(struct comedi_device *, struct comedi_subdevice *,
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struct comedi_insn *, unsigned int *);
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void comedi_device_detach(struct comedi_device *);
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int comedi_device_attach(struct comedi_device *, struct comedi_devconfig *);
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#ifdef CONFIG_PROC_FS
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/* proc.c */
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void comedi_proc_init(void);
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void comedi_proc_cleanup(void);
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#else
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static inline void comedi_proc_init(void)
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{
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}
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static inline void comedi_proc_cleanup(void)
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{
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}
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#endif
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#endif /* _COMEDI_INTERNAL_H */
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