On Oct 16 2007 17:47, Nick Piggin wrote:
>
>Here's a quick first hack...
Inline patches preferred ;-)
>+config BLK_DEV_BRD
>+ tristate "RAM block device support"
>+ ---help---
>+ This is a new based block driver that replaces BLK_DEV_RAM.
based on what? -^
>+ To compile this driver as a module, choose M here: the
>+ module will be called rd.
called brd.ko.
>+/*
>+ * And now the modules code and kernel interface.
>+ */
>+static int rd_nr;
>+static int rd_size = CONFIG_BLK_DEV_RAM_SIZE;
Perhaps unsigned?
Perhaps even long for rd_size?
>+module_param(rd_nr, int, 0);
>+MODULE_PARM_DESC(rd_nr, "Maximum number of brd devices");
>+module_param(rd_size, int, 0);
>+MODULE_PARM_DESC(rd_size, "Size of each RAM disk in kbytes.");
>+MODULE_LICENSE("GPL");
>+MODULE_ALIAS_BLOCKDEV_MAJOR(RAMDISK_MAJOR);
>+
>+/* options - nonmodular */
>+#ifndef MODULE
>+static int __init ramdisk_size(char *str)
>+{
>+ rd_size = simple_strtol(str,NULL,0);
>+ return 1;
>+}
Is this, besides for compatibility, really needed?
>+static int __init ramdisk_size2(char *str)
>+{
>+ return ramdisk_size(str);
>+}
>+static int __init rd_nr(char *str)
Err! Overlapping symbols! The rd_nr() function collides with the rd_nr
variable. It also does not seem needed, since it did not exist before.
It should go, you can set the variable with brd.rd_nr=XXX (same
goes for ramdisk_size). What's the point of ramdisk_size2()?
>+{
>+ rd_nr = simple_strtol(str, NULL, 0);
>+ return 1;
>+}
>+__setup("ramdisk=", ramdisk_size);
>+__setup("ramdisk_size=", ramdisk_size2);
__setup("ramdisk_size=", ramdisk_size); maybe, or does not that work?
>+__setup("rd_nr=", rd_nr);
>+#endif
>+
>+
>+static struct brd_device *brd_alloc(int i)
>+{
>+ struct brd_device *brd;
>+ struct gendisk *disk;
>+
>+ brd = kzalloc(sizeof(*brd), GFP_KERNEL);
>+ if (!brd)
>+ goto out;
>+ brd->brd_number = i;
-
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