Messages in this thread Patch in this message | | | Subject | [PATCH 3/5] HID: roccat: declaring meaning of pack pragma usage in driver headers | From | Stefan Achatz <> | Date | Fri, 26 Nov 2010 20:57:36 +0100 |
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Using pack pragma to prevent padding bytes in binary data structures used for hardware communication. Explanation of these pragmas was requested.
Signed-off-by: Stefan Achatz <erazor_de@users.sourceforge.net> --- drivers/hid/hid-roccat-kone.h | 3 +++ drivers/hid/hid-roccat-pyra.h | 3 +++ 2 files changed, 6 insertions(+), 0 deletions(-)
diff --git a/drivers/hid/hid-roccat-kone.h b/drivers/hid/hid-roccat-kone.h index 130d656..11203a7 100644 --- a/drivers/hid/hid-roccat-kone.h +++ b/drivers/hid/hid-roccat-kone.h @@ -14,6 +14,9 @@ #include <linux/types.h> +/* + * Binary data structures used for hardware communication must have no padding. + */ #pragma pack(push) #pragma pack(1) diff --git a/drivers/hid/hid-roccat-pyra.h b/drivers/hid/hid-roccat-pyra.h index 22f80a8..ac5996e 100644 --- a/drivers/hid/hid-roccat-pyra.h +++ b/drivers/hid/hid-roccat-pyra.h @@ -14,6 +14,9 @@ #include <linux/types.h> +/* + * Binary data structures used for hardware communication must have no padding. + */ #pragma pack(push) #pragma pack(1) -- 1.7.2.3
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