git and file name case on cygwin

There's something funny going on with git in cygwin. The following is in a clone of linux 2.6, with no local modifications (only the occasional pull from upstream).

Niklas Hoglund@NIKLAS /c/linux-2.6
$ git pull
remote: Generating pack...
remote: Done counting 220 objects.
remote: Result has 154 objects.
remote: Deltifying 154 objects.
remote:  100% (154/154) done
Unpacking 154 objects
remote: Total 154, written 154 (delta 124), reused 105 (delta 86)
 100% (154/154) done
* refs/heads/origin: fast forward to branch 'master' of
git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6
  old..new: a7ec3f5..05a8057
Updating a7ec3f5..05a8057
include/linux/netfilter/xt_CONNMARK.h: needs update
include/linux/netfilter/xt_DSCP.h: needs update
include/linux/netfilter/xt_MARK.h: needs update
include/linux/netfilter_ipv4/ipt_CONNMARK.h: needs update
include/linux/netfilter_ipv4/ipt_DSCP.h: needs update
include/linux/netfilter_ipv4/ipt_ECN.h: needs update
include/linux/netfilter_ipv4/ipt_MARK.h: needs update
include/linux/netfilter_ipv4/ipt_TCPMSS.h: needs update
include/linux/netfilter_ipv4/ipt_TOS.h: needs update
include/linux/netfilter_ipv4/ipt_TTL.h: needs update
include/linux/netfilter_ipv6/ip6t_HL.h: needs update
include/linux/netfilter_ipv6/ip6t_MARK.h: needs update
net/ipv4/netfilter/ipt_ECN.c: needs update
net/ipv4/netfilter/ipt_TOS.c: needs update
net/ipv4/netfilter/ipt_TTL.c: needs update
net/ipv6/netfilter/ip6t_HL.c: needs update
net/netfilter/xt_CONNMARK.c: needs update
net/netfilter/xt_DSCP.c: needs update
net/netfilter/xt_mark.c: needs update
Fast forward
 MAINTAINERS                         |    6 +-
 arch/i386/kernel/acpi/boot.c        |    2 +-
 drivers/acpi/ec.c                   |    2 +-
 drivers/hid/Kconfig                 |   18 +++-
 drivers/net/Space.c                 |   11 --
 drivers/net/ifb.c                   |    4 +-
 drivers/net/loopback.c              |    4 +-
 drivers/net/sungem.c                |    3 +-
 drivers/net/sungem_phy.c            |  179 ++++++++++++++++++++++++++++++-----
 drivers/net/sungem_phy.h            |    7 +-
 drivers/usb/input/Kconfig           |    6 +-
 drivers/video/backlight/corgi_bl.c  |    2 +-
 drivers/video/backlight/hp680_bl.c  |    2 +-

Niklas Hoglund@NIKLAS /c/linux-2.6 $ git status # Changed but not updated: # (use git-update-index to mark for commit) # # modified: include/linux/netfilter/xt_CONNMARK.h # modified: include/linux/netfilter/xt_DSCP.h # modified: include/linux/netfilter/xt_MARK.h # modified: include/linux/netfilter_ipv4/ipt_CONNMARK.h # modified: include/linux/netfilter_ipv4/ipt_DSCP.h # modified: include/linux/netfilter_ipv4/ipt_ECN.h # modified: include/linux/netfilter_ipv4/ipt_MARK.h # modified: include/linux/netfilter_ipv4/ipt_TCPMSS.h # modified: include/linux/netfilter_ipv4/ipt_TOS.h # modified: include/linux/netfilter_ipv4/ipt_TTL.h # modified: include/linux/netfilter_ipv6/ip6t_HL.h # modified: include/linux/netfilter_ipv6/ip6t_MARK.h # modified: net/ipv4/netfilter/ipt_ECN.c # modified: net/ipv4/netfilter/ipt_TOS.c # modified: net/ipv4/netfilter/ipt_TTL.c # modified: net/ipv6/netfilter/ip6t_HL.c # modified: net/netfilter/xt_CONNMARK.c # modified: net/netfilter/xt_DSCP.c # modified: net/netfilter/xt_mark.c # nothing to commit

Niklas Hoglund@NIKLAS /c/linux-2.6 $ git reset --hard

Niklas Hoglund@NIKLAS /c/linux-2.6 $ git pull Already up-to-date.

Niklas Hoglund@NIKLAS /c/linux-2.6 $ git status # Changed but not updated: # (use git-update-index to mark for commit) # # modified: include/linux/netfilter/xt_connmark.h # modified: include/linux/netfilter/xt_dscp.h # modified: include/linux/netfilter/xt_mark.h # modified: include/linux/netfilter_ipv4/ipt_connmark.h # modified: include/linux/netfilter_ipv4/ipt_dscp.h # modified: include/linux/netfilter_ipv4/ipt_ecn.h # modified: include/linux/netfilter_ipv4/ipt_mark.h # modified: include/linux/netfilter_ipv4/ipt_tcpmss.h # modified: include/linux/netfilter_ipv4/ipt_tos.h # modified: include/linux/netfilter_ipv4/ipt_ttl.h # modified: include/linux/netfilter_ipv6/ip6t_hl.h # modified: include/linux/netfilter_ipv6/ip6t_mark.h # modified: net/ipv4/netfilter/ipt_ecn.c # modified: net/ipv4/netfilter/ipt_tos.c # modified: net/ipv4/netfilter/ipt_ttl.c # modified: net/ipv6/netfilter/ip6t_hl.c # modified: net/netfilter/xt_MARK.c # modified: net/netfilter/xt_connmark.c # modified: net/netfilter/xt_dscp.c # nothing to commit

Notice how all the files in the above list changed case since the previous invocation of git status.

The above has the unfortunate effect that the merge in a pull often refuses to run, requiring "git reset --hard origin" to update the working tree.