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efi_loader: comments for dp_part_fill()

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Add a description for dp_part_fill().
Reword a comment in the function.

Signed-off-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Heinrich Schuchardt 2017-12-11 12:56:42 +01:00 • committed by Alexander Graf
parent 6ea8b580f0
commit bde6bfe4c3
1 changed files with 8 additions and 1 deletions
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9
lib/efi_loader/efi_device_path.c
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@ -399,6 +399,13 @@ static unsigned dp_part_size(struct blk_desc *desc, int part)
return dpsize; return dpsize;
} }
/*
* Create a device path for a block device or one of its partitions.
*
* @buf buffer to which the device path is wirtten
* @desc block device descriptor
* @part partition number, 0 identifies a block device
*/
static void *dp_part_fill(void *buf, struct blk_desc *desc, int part) static void *dp_part_fill(void *buf, struct blk_desc *desc, int part)
{ {
disk_partition_t info; disk_partition_t info;
@ -411,7 +418,7 @@ static void *dp_part_fill(void *buf, struct blk_desc *desc, int part)
* and handling all the different cases like we do for non- * and handling all the different cases like we do for non-
* legacy (ie CONFIG_BLK=y) case. But most important thing * legacy (ie CONFIG_BLK=y) case. But most important thing
* is just to have a unique device-path for if_type+devnum. * is just to have a unique device-path for if_type+devnum.
* So map things to a fictional USB device: * So map things to a fictitious USB device.
*/ */
struct efi_device_path_usb *udp; struct efi_device_path_usb *udp;