what started off as just some nonchalant poking around in kernel
data structures has become moderately educational. i had no idea that
there is support for *sorting* the nodes of a kernel LL in
<linux/list_sort.h>:
void list_sort(void *priv, struct list_head *head,
int (*cmp)(void *priv, struct list_head *a,
struct list_head *b));
doesn't seem to be a lot of folks using that:
$ grep -rw list_sort *
drivers/gpu/drm/drm_modes.c:#include <linux/list_sort.h>
drivers/gpu/drm/drm_modes.c: list_sort(NULL, mode_list, drm_mode_compare);
fs/xfs/linux-2.6/xfs_buf.c:#include <linux/list_sort.h>
fs/xfs/linux-2.6/xfs_buf.c: list_sort(NULL, list, xfs_buf_cmp);
fs/xfs/linux-2.6/xfs_buf.c: list_sort(NULL, &tmp, xfs_buf_cmp);
fs/xfs/linux-2.6/xfs_buf.c: list_sort(NULL, &tmp_list, xfs_buf_cmp);
fs/ubifs/gc.c:#include <linux/list_sort.h>
fs/ubifs/gc.c: list_sort(c, &sleb->nodes, &data_nodes_cmp);
fs/ubifs/gc.c: list_sort(c, nondata, &nondata_nodes_cmp);
... extraneous junk snipped ...
i wonder how much kernel code manually sorts a linked list, not
realizing that there's kernel library support for that.
rday
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Robert P. J. Day Waterloo, Ontario, CANADA
http://crashcourse.ca
Twitter: http://twitter.com/rpjday
LinkedIn: http://ca.linkedin.com/in/rpjday
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