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HID: Export hid_field_extract()

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Rename the function extract() to hid_field_extract(), make it external linkage
to allow the use from other modules.

Suggested-by: Jiri Kosina <jkosina@suse.cz>
Signed-off-by: Goffredo Baroncelli <kreijack@inwind.it>
Reviewed-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>
This commit is contained in:
Goffredo Baroncelli 2015-05-30 11:00:26 +02:00 committed by Jiri Kosina
parent f4e1eb9662
commit 04fba7864f
2 changed files with 8 additions and 5 deletions
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11
drivers/hid/hid-core.c
View File

@ -1061,13 +1061,13 @@ static u32 s32ton(__s32 value, unsigned n)
* Search linux-kernel and linux-usb-devel archives for "hid-core extract".
*/
static __u32 extract(const struct hid_device *hid, __u8 *report,
__u32 hid_field_extract(const struct hid_device *hid, __u8 *report,
unsigned offset, unsigned n)
{
u64 x;
if (n > 32)
hid_warn(hid, "extract() called with n (%d) > 32! (%s)\n",
hid_warn(hid, "hid_field_extract() called with n (%d) > 32! (%s)\n",
n, current->comm);
report += offset >> 3; /* adjust byte index */
@ -1076,6 +1076,7 @@ static __u32 extract(const struct hid_device *hid, __u8 *report,
x = (x >> offset) & ((1ULL << n) - 1); /* extract bit field */
return (u32) x;
}
EXPORT_SYMBOL_GPL(hid_field_extract);
/*
* "implement" : set bits in a little endian bit stream.
@ -1221,9 +1222,9 @@ static void hid_input_field(struct hid_device *hid, struct hid_field *field,
for (n = 0; n < count; n++) {
value[n] = min < 0 ?
snto32(extract(hid, data, offset + n * size, size),
size) :
extract(hid, data, offset + n * size, size);
snto32(hid_field_extract(hid, data, offset + n * size,
size), size) :
hid_field_extract(hid, data, offset + n * size, size);
/* Ignore report if ErrorRollOver */
if (!(field->flags & HID_MAIN_ITEM_VARIABLE) &&

2
include/linux/hid.h
View File

@ -815,6 +815,8 @@ void hid_disconnect(struct hid_device *hid);
const struct hid_device_id *hid_match_id(struct hid_device *hdev,
const struct hid_device_id *id);
s32 hid_snto32(__u32 value, unsigned n);
__u32 hid_field_extract(const struct hid_device *hid, __u8 *report,
unsigned offset, unsigned n);
/**
* hid_device_io_start - enable HID input during probe, remove