sys-kernel/development-sources has a new version out every few days. Rather than download the entire kernel, it would save massive amounts of time for each user and massive amounts of bandwidth if the patches were used to update the kernel. For example, if you have the source for 2.5.57 in /usr/portage/distfiles and 2.5.58 comes out, 1. patch-2.5.58.gz be downloaded (188k) rather than linux-2.5.58.tar.bz2 (30.1 MB), let 2. linux-2.5.57 should be unpacked in $PORTAGE_TMPDIR, 3. $PORTAGE_TMPDIR/portage/linux-2.5.57 shoudl be patched with patch-2.5.58 4. linux-2.5.58 should be installed
*** This bug has been marked as a duplicate of 11470 ***