I have just emerged the new sys-kernel/gentoo-dev-sources-2.6.1 ebuild, configured the kernel (with make oldconfig) using the same .config from the previous kernel release (config-2.6.1-rc3-gentoo) and started compiling it (make). Compilation stops with the messages: [...] CC drivers/block/deadline-iosched.o {standard input}: Assembler messages: {standard input}:1144: Error: invalid character ';' in mnemonic {standard input}:1257: Error: invalid character ';' in mnemonic make[2]: *** [drivers/block/deadline-iosched.o] Error 1 make[1]: *** [drivers/block] Error 2 make: *** [drivers] Error 2 Reproducible: Always Steps to Reproduce: 1. 2. 3. # emerge info Portage 2.0.49-r20 (default-x86-1.4, gcc-3.3.2, glibc-2.3.3_pre20031222-r0, 2.6.1-rc2-gentoo) ================================================================= System uname: 2.6.1-rc2-gentoo i686 AMD Athlon(tm) XP 2000+ Gentoo Base System version 1.4.3.12 ACCEPT_KEYWORDS="x86 ~x86" AUTOCLEAN="yes" CFLAGS="-O3 -march=athlon-xp -funroll-loops -fprefetch-loop-arrays -pipe" CHOST="i686-pc-linux-gnu" COMPILER="gcc3" CONFIG_PROTECT="/etc /usr/X11R6/lib/X11/xkb /usr/kde/2/share/config /usr/kde/3.1/share/config /usr/kde/3/share/config /usr/share/config /usr/share/texmf/dvipdfm/config/ /usr/share/texmf/dvips/config/ /usr/share/texmf/tex/generic/config/ /usr/share/texmf/tex/platex/config/ /usr/share/texmf/xdvi/ /var/qmail/control" CONFIG_PROTECT_MASK="/etc/gconf /etc/env.d" CXXFLAGS="-O3 -march=athlon-xp -funroll-loops -fprefetch-loop-arrays -pipe" DISTDIR="/usr/portage/distfiles" FEATURES="autoaddcvs buildpkg ccache sandbox" GENTOO_MIRRORS="http://gentoo.oregonstate.edu http://distro.ibiblio.org/pub/Linux/distributions/gentoo" MAKEOPTS="-j2" PKGDIR="/usr/portage/packages" PORTAGE_TMPDIR="/var/tmp" PORTDIR="/usr/portage" PORTDIR_OVERLAY="/usr/local/portage" SYNC="rsync://rsync.gentoo.org/gentoo-portage" USE="3dnow X aalib acl acpi alsa apm arts artswrappersuid avi berkdb bonobo cdr crypt cups dvd encode esd fbcon foomaticdb gdbm gif gnome gpm gtk gtk2 gtkhtml guile imap imlib java javascript jpeg kde libg++ libwww lirc mad mbox mikmod mmx motif mozilla mozsvg mpeg mysql ncurses nls oggvorbis opengl oss pam pdflib perl png python qt quicktime readline rplay samba sdl slang spell sse ssl stroke svga tcltk tcpd tetex tiff truetype usb wmf x86 xface xml xml2 xmms xv zlib"
Somehow I have managed to compile this kernel and the error has gone. I do not know exactly what eliminated it. I made 'mrproper', commented out the relevant entries in the old .config file and made 'oldconfig'. Then compilation was successfull. So I am marking this bug as invalid. If anybody else meets it again, then it can be reopened.