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Message-Id: <1337128544-18680-1-git-send-email-paul.gortmaker@windriver.com> Date: Tue, 15 May 2012 20:35:40 -0400 From: Paul Gortmaker <paul.gortmaker@...driver.com> To: davem@...emloft.net Cc: netdev@...r.kernel.org, Paul Gortmaker <paul.gortmaker@...driver.com>, Martin Schwidefsky <schwidefsky@...ibm.com>, Heiko Carstens <heiko.carstens@...ibm.com>, linux390@...ibm.com, linux-s390@...r.kernel.org Subject: [PATCH/RFC net-next 0/4] Delete token ring support. This may not be for 35-next, but for addition to feature-removal.txt and application at a later date. But what I would like to get is consensus that this is something that we want to proceed with before I spend any more time on it. If folks are OK with the idea, then I am open to suggestions as to the best time for it to happen. So, why you might ask? It is in tree already, it is "free" to leave it there, right? Well, no. What led me here was the creation of a patch to remove CONFIG_MCA. In doing so, I found I was deleting most of the token ring drivers, and altering the remaining few ISA/MCA ones to be just ISA only. But it really didn't make sense to me, to just leave the skeletal remains of token ring there -- vs removing TR 1st, and then the MCA removal will be a lot smaller and cleaner commit. Removal: does it make sense? The biggest data point I can suggest to folks is to run: git whatchanged --follow drivers/net/tokenring and when you are quickly paging over the changes, note two things. (1) the amount of time spent by folks cleaning and maintaining the code, and (2) - most important -- is that essentially all the commits are of the tree-wide cleanup nature, or API change nature. What I mean by (2) is the implicit absence of anyone fixing _runtime_ bugs, going all the way back to 2.6.12 in 2005. If the code was being _used_, we'd see runtime regressions reported and their associated fixes. A search on the internet for users tends to show that even the die hard enthusiasts who cared to poke at MCA/TR just for hobby sake have pretty much all given up somewhere in the 2003-2005 "pre-git" timeframe, and never really moved off their 2.4.x kernels. This is no surprise, since on x86, MCA (and hence most tokenring users) was limited to the lowly 386sx-16 PS/2 with typically 4MB RAM. Some "high end" 486 machines existed, and in theory could be fitted with max 64MB RAM (default 16MB). I don't think anyone will debate that such hardware with such limited memory is ever going to be useful in a 3.x kernel use case. The one thing I wasn't aware of, until actually creating the commits to remove tokenring, was that s390 also had support for it. I'm guessing that it is just as unused there as it is on x86, but the s390 folks are CC'd for their input. I've created separate commits for the removal of the core networking support (i.e. net/*) vs. the drivers removal (i.e. drivers/net). This is a somewhat artifical separation, since one is useless without the other, but it makes for easier review, and is still fully bisectable. These can easily be squished into one commit if folks have a preference one way or the other. I still want to double check a few things, but it is at a point where people can clearly see what will be removed, so I think checking for input now as an RFC makes sense. Since it is an RFC, I've told git to omit showing the full line-by-line deletion of whole files. The baseline used is net-next from today. Thanks, Paul. --- Cc: Martin Schwidefsky <schwidefsky@...ibm.com> Cc: Heiko Carstens <heiko.carstens@...ibm.com> Cc: linux390@...ibm.com Cc: linux-s390@...r.kernel.org Paul Gortmaker (4): s390: delete any traces of token ring support atm: remove the coupling to token ring support net: delete all instances of special processing for token ring tokenring: delete all remaining driver support Documentation/filesystems/proc.txt | 1 - Documentation/networking/00-INDEX | 8 - Documentation/networking/3c359.txt | 58 - Documentation/networking/olympic.txt | 79 - Documentation/networking/smctr.txt | 66 - Documentation/networking/tms380tr.txt | 147 - arch/mips/configs/mtx1_defconfig | 4 - arch/xtensa/configs/common_defconfig | 5 - drivers/message/fusion/mptlan.h | 1 - drivers/net/Kconfig | 2 - drivers/net/Makefile | 1 - drivers/net/Space.c | 46 - drivers/net/tokenring/3c359.c | 1831 ----------- drivers/net/tokenring/3c359.h | 291 -- drivers/net/tokenring/Kconfig | 199 -- drivers/net/tokenring/Makefile | 16 - drivers/net/tokenring/abyss.c | 468 --- drivers/net/tokenring/abyss.h | 58 - drivers/net/tokenring/ibmtr.c | 1964 ----------- drivers/net/tokenring/ibmtr_cs.c | 370 --- drivers/net/tokenring/lanstreamer.c | 1909 ----------- drivers/net/tokenring/lanstreamer.h | 343 -- drivers/net/tokenring/madgemc.c | 761 ----- drivers/net/tokenring/madgemc.h | 70 - drivers/net/tokenring/olympic.c | 1737 ---------- drivers/net/tokenring/olympic.h | 321 -- drivers/net/tokenring/proteon.c | 422 --- drivers/net/tokenring/skisa.c | 432 --- drivers/net/tokenring/smctr.c | 5717 --------------------------------- drivers/net/tokenring/smctr.h | 1585 --------- drivers/net/tokenring/tms380tr.c | 2306 ------------- drivers/net/tokenring/tms380tr.h | 1141 ------- drivers/net/tokenring/tmspci.c | 236 -- drivers/s390/net/Kconfig | 5 +- drivers/s390/net/lcs.c | 21 +- drivers/s390/net/qeth_core.h | 2 - drivers/s390/net/qeth_core_main.c | 6 +- drivers/s390/net/qeth_l3_main.c | 35 +- firmware/3com/3C359.bin.ihex | 1573 --------- firmware/Makefile | 2 - firmware/WHENCE | 38 - firmware/tr_smctr.bin.ihex | 477 --- include/linux/Kbuild | 1 - include/linux/atmlec.h | 7 - include/linux/ibmtr.h | 373 --- include/linux/if_arp.h | 2 +- include/linux/if_tr.h | 103 - include/linux/ipx.h | 2 +- include/linux/trdevice.h | 37 - include/net/if_inet6.h | 54 - include/net/ip.h | 17 - include/net/llc_pdu.h | 7 - net/802/Makefile | 1 - net/802/p8022.c | 3 +- net/802/tr.c | 670 ---- net/atm/lec.c | 138 +- net/atm/lec.h | 1 - net/core/dev.c | 14 +- net/ipv4/Kconfig | 4 +- net/ipv4/arp.c | 13 +- net/ipv4/ipconfig.c | 2 - net/ipv6/addrconf.c | 2 - net/ipv6/ndisc.c | 17 - net/ipx/af_ipx.c | 10 +- net/llc/af_llc.c | 3 +- net/llc/llc_output.c | 3 - net/llc/llc_sap.c | 4 - net/sysctl_net.c | 4 - 68 files changed, 33 insertions(+), 26213 deletions(-) delete mode 100644 Documentation/networking/3c359.txt delete mode 100644 Documentation/networking/olympic.txt delete mode 100644 Documentation/networking/smctr.txt delete mode 100644 Documentation/networking/tms380tr.txt delete mode 100644 drivers/net/tokenring/3c359.c delete mode 100644 drivers/net/tokenring/3c359.h delete mode 100644 drivers/net/tokenring/Kconfig delete mode 100644 drivers/net/tokenring/Makefile delete mode 100644 drivers/net/tokenring/abyss.c delete mode 100644 drivers/net/tokenring/abyss.h delete mode 100644 drivers/net/tokenring/ibmtr.c delete mode 100644 drivers/net/tokenring/ibmtr_cs.c delete mode 100644 drivers/net/tokenring/lanstreamer.c delete mode 100644 drivers/net/tokenring/lanstreamer.h delete mode 100644 drivers/net/tokenring/madgemc.c delete mode 100644 drivers/net/tokenring/madgemc.h delete mode 100644 drivers/net/tokenring/olympic.c delete mode 100644 drivers/net/tokenring/olympic.h delete mode 100644 drivers/net/tokenring/proteon.c delete mode 100644 drivers/net/tokenring/skisa.c delete mode 100644 drivers/net/tokenring/smctr.c delete mode 100644 drivers/net/tokenring/smctr.h delete mode 100644 drivers/net/tokenring/tms380tr.c delete mode 100644 drivers/net/tokenring/tms380tr.h delete mode 100644 drivers/net/tokenring/tmspci.c delete mode 100644 firmware/3com/3C359.bin.ihex delete mode 100644 firmware/tr_smctr.bin.ihex delete mode 100644 include/linux/ibmtr.h delete mode 100644 include/linux/if_tr.h delete mode 100644 include/linux/trdevice.h delete mode 100644 net/802/tr.c -- 1.7.9.1 -- To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
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