Peter Zijlstra fa73158710 perf: Fix capabilities bitfield compatibility in 'struct perf_event_mmap_page' ... Solve the problems around the broken definition of perf_event_mmap_page:: cap_usr_time and cap_usr_rdpmc fields which used to overlap, partially fixed by: 860f085b74 ("perf: Fix broken union in 'struct perf_event_mmap_page'") The problem with the fix (merged in v3.12-rc1 and not yet released officially), noticed by Vince Weaver is that the new behavior is not detectable by new user-space, and that due to the reuse of the field names it's easy to mis-compile a binary if old headers are used on a new kernel or new headers are used on an old kernel. To solve all that make this change explicit, detectable and self-contained, by iterating the ABI the following way: - Always clear bit 0, and rename it to usrpage->cap_bit0, to at least not confuse old user-space binaries. RDPMC will be marked as unavailable to old binaries but that's within the ABI, this is a capability bit. - Rename bit 1 to ->cap_bit0_is_deprecated and always set it to 1, so new libraries can reliably detect that bit 0 is deprecated and perma-zero without having to check the kernel version. - Use bits 2, 3, 4 for the newly defined, correct functionality: cap_user_rdpmc : 1, /* The RDPMC instruction can be used to read counts */ cap_user_time : 1, /* The time_* fields are used */ cap_user_time_zero : 1, /* The time_zero field is used */ - Rename all the bitfield names in perf_event.h to be different from the old names, to make sure it's not possible to mis-compile it accidentally with old assumptions. The 'size' field can then be used in the future to add new fields and it will act as a natural ABI version indicator as well. Also adjust tools/perf/ userspace for the new definitions, noticed by Adrian Hunter. Reported-by: Vince Weaver <vincent.weaver@maine.edu> Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Also-Fixed-by: Adrian Hunter <adrian.hunter@intel.com> Link: http://lkml.kernel.org/n/tip-zr03yxjrpXesOzzupszqglbv@git.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>		2013-09-20 09:45:11 +02:00
..
byteorder
caif
can	can: gw: add a per rule limitation of frame hops	2013-08-29 22:58:24 +02:00
cifs	cifs: Move and expand MAX_SERVER_SIZE definition	2013-09-08 14:34:22 -05:00
dvb
hdlc
hsi
isdn
mmc
netfilter	netfilter: add SYNPROXY core/target	2013-08-28 00:27:54 +02:00
netfilter_arp
netfilter_bridge	uapi: Convert some uses of 6 to ETH_ALEN	2013-08-02 12:33:54 -07:00
netfilter_ipv4	uapi: Convert some uses of 6 to ETH_ALEN	2013-08-02 12:33:54 -07:00
netfilter_ipv6
nfsd
raid
spi
sunrpc
tc_act
tc_ematch
usb	USB: move the definition of USB_MAXCHILDREN	2013-07-16 15:33:02 -07:00
wimax	uapi: Convert some uses of 6 to ETH_ALEN	2013-08-02 12:33:54 -07:00
a.out.h
acct.h
adb.h
adfs_fs.h
affs_hardblocks.h
agpgart.h
aio_abi.h
apm_bios.h
arcfb.h
atalk.h
atm.h
atm_eni.h
atm_he.h
atm_idt77105.h
atm_nicstar.h
atm_tcp.h
atm_zatm.h
atmapi.h
atmarp.h
atmbr2684.h
atmclip.h
atmdev.h
atmioc.h
atmlec.h
atmmpc.h
atmppp.h
atmsap.h
atmsvc.h
audit.h	audit: Make testing for a valid loginuid explicit.	2013-05-07 22:27:15 -04:00
auto_fs.h
auto_fs4.h
auxvec.h
ax25.h
b1lli.h
baycom.h
bcm933xx_hcs.h	MIPS: BCM63XX: recognize Cable Modem firmware format	2013-07-01 15:10:53 +02:00
bfs_fs.h
binfmts.h
blkpg.h
blktrace_api.h
bpqether.h
bsg.h
btrfs.h	Btrfs: use __u64 in exported user headers	2013-09-01 08:16:01 -04:00
can.h
capability.h
capi.h
cciss_defs.h
cciss_ioctl.h
cdrom.h
cgroupstats.h
chio.h
cm4000_cs.h	Omnikey Cardman 4000: pull in ioctl.h in user header	2013-08-28 19:26:38 -07:00
cn_proc.h
coda.h
coda_psdev.h
coff.h
connector.h
const.h	linux/const.h: Add _BITUL() and _BITULL()	2013-06-25 15:50:04 -07:00
cramfs_fs.h
cuda.h
cyclades.h
cycx_cfm.h
dcbnl.h
dccp.h
dlm.h
dlm_device.h
dlm_netlink.h
dlm_plock.h
dlmconstants.h
dm-ioctl.h	dm: add statistics support	2013-09-05 20:46:06 -04:00
dm-log-userspace.h
dn.h	uapi: Convert some uses of 6 to ETH_ALEN	2013-08-02 12:33:54 -07:00
dqblk_xfs.h	quota: Add a new quotactl command Q_XGETQSTATV	2013-08-20 16:53:58 -05:00
edd.h
efs_fs_sb.h
elf-em.h	Move the EM_ARM and EM_AARCH64 definitions to uapi/linux/elf-em.h	2013-09-02 16:35:50 +01:00
elf-fdpic.h
elf.h
elfcore.h
errno.h
errqueue.h
ethtool.h	net: ethtool: disambiguate XCVR_* meaning	2013-05-27 22:42:50 -07:00
eventpoll.h
fadvise.h
falloc.h
fanotify.h
fb.h
fcntl.h
fd.h
fdreg.h
fib_rules.h	fib_rules: fix suppressor names and default values	2013-08-03 10:40:23 -07:00
fiemap.h	ext4: add support for extent pre-caching	2013-08-16 22:05:14 -04:00
filter.h
firewire-cdev.h	firewire: fix libdc1394/FlyCap2 iso event regression	2013-07-27 20:24:36 +02:00
firewire-constants.h
flat.h
fs.h	fs: bump inode and dentry counters to long	2013-09-10 18:56:29 -04:00
fsl_hypervisor.h
fuse.h
futex.h
gameport.h
gen_stats.h	net_sched: add 64bit rate estimators	2013-06-11 02:51:03 -07:00
genetlink.h
gfs2_ondisk.h
gigaset_dev.h
hdlc.h
hdlcdrv.h
hdreg.h
hid.h
hiddev.h
hidraw.h
hpet.h
hw_breakpoint.h
hysdn_if.h
i2c-dev.h
i2c.h
i2o-dev.h
i8k.h
icmp.h
icmpv6.h	ICMPv6: treat dest unreachable codes 5 and 6 as EACCES, not EPROTO	2013-09-03 22:11:44 -04:00
if.h
if_addr.h
if_addrlabel.h
if_alg.h
if_arcnet.h
if_arp.h	net: if_arp: add ARPHRD_NETLINK type	2013-06-24 16:39:05 -07:00
if_bonding.h
if_bridge.h	uapi: Convert some uses of 6 to ETH_ALEN	2013-08-02 12:33:54 -07:00
if_cablemodem.h	if_cablemodem.h: Add parenthesis around ioctl macros	2013-05-08 13:13:30 -07:00
if_eql.h
if_ether.h
if_fc.h
if_fddi.h
if_frad.h
if_hippi.h
if_infiniband.h
if_link.h	vxlan: add ipv6 support	2013-08-31 22:30:00 -04:00
if_ltalk.h
if_packet.h	net: packet: add randomized fanout scheduler	2013-08-29 16:43:29 -04:00
if_phonet.h
if_plip.h
if_ppp.h
if_pppol2tp.h
if_pppox.h	pptp: fix byte order warnings	2013-08-13 15:10:22 -07:00
if_slip.h
if_team.h
if_tun.h	tun: Get skfilter layout	2013-08-21 12:21:45 -07:00
if_tunnel.h
if_vlan.h
if_x25.h
igmp.h
in.h	net: sync some IP headers with glibc	2013-09-04 13:12:43 -04:00
in6.h	net: sync some IP headers with glibc	2013-09-04 13:12:43 -04:00
in_route.h
inet_diag.h
inotify.h
input.h	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input	2013-09-15 07:13:39 -04:00
ioctl.h
ip.h	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2013-08-26 16:37:08 -04:00
ip6_tunnel.h
ip_vs.h	ipvs: SH fallback and L4 hashing	2013-06-26 18:01:46 +09:00
ipc.h
ipmi.h
ipmi_msgdefs.h
ipsec.h
ipv6.h	ipv6: drop fragmented ndisc packets by default (RFC 6980)	2013-08-29 15:32:08 -04:00
ipv6_route.h
ipx.h
irda.h
irqnr.h
isdn.h
isdn_divertif.h
isdn_ppp.h
isdnif.h
iso_fs.h
ivtv.h
ivtvfb.h
ixjuser.h
jffs2.h
joystick.h
Kbuild	Merge git://git.infradead.org/users/willy/linux-nvme	2013-09-07 20:19:02 -07:00
kd.h
kdev_t.h
kernel-page-flags.h
kernel.h
kernelcapi.h
kexec.h
keyboard.h
keyctl.h
kvm.h	KVM: PPC: reserve a capability number for multitce support	2013-08-26 15:36:58 +03:00
kvm_para.h	kvm uapi: Add KICK_CPU and PV_UNHALT definition to uapi	2013-08-26 12:46:01 +03:00
l2tp.h
libc-compat.h	net: sync some IP headers with glibc	2013-09-04 13:12:43 -04:00
limits.h
llc.h
loop.h
lp.h
magic.h
major.h
map_to_7segment.h
matroxfb.h
mdio.h
media.h
mei.h
mempolicy.h
meye.h
mii.h
minix_fs.h
mman.h
mmtimer.h
module.h
mqueue.h
mroute.h
mroute6.h
msdos_fs.h	fatfs: add FAT_IOCTL_GET_VOLUME_ID	2013-07-09 10:33:25 -07:00
msg.h
mtio.h
n_r3964.h
nbd.h
ncp.h
ncp_fs.h
ncp_mount.h
ncp_no.h
neighbour.h
net.h
net_dropmon.h
net_tstamp.h
netconf.h
netdevice.h
netfilter.h
netfilter_arp.h
netfilter_bridge.h
netfilter_decnet.h
netfilter_ipv4.h
netfilter_ipv6.h
netlink.h
netlink_diag.h
netrom.h
nfc.h	NFC: netlink: Add result of firmware operation to completion event	2013-08-14 01:12:58 +02:00
nfs.h
nfs2.h
nfs3.h
nfs4.h
nfs4_mount.h
nfs_fs.h
nfs_idmap.h
nfs_mount.h
nfsacl.h
nl80211.h	cfg80211: add flags to cfg80211_rx_mgmt()	2013-08-23 16:06:03 +02:00
nubus.h
nvme.h	NVMe: Update nvme_id_power_state with latest spec	2013-09-03 16:32:26 -04:00
nvram.h
omap3isp.h
omapfb.h
oom.h
openvswitch.h	openvswitch: Add SCTP support	2013-08-26 14:03:13 -07:00
packet_diag.h
param.h
parport.h
patchkey.h
pci.h
pci_regs.h	PCI: Add offsets of PCIe capability registers	2013-08-28 11:28:10 -06:00
perf_event.h	perf: Fix capabilities bitfield compatibility in 'struct perf_event_mmap_page'	2013-09-20 09:45:11 +02:00
personality.h
pfkeyv2.h
pg.h
phantom.h
phonet.h
pkt_cls.h
pkt_sched.h	pkt_sched: fq: Fair Queue packet scheduler	2013-08-29 21:38:31 -04:00
pktcdvd.h
pmu.h
poll.h
posix_types.h
ppdev.h
ppp-comp.h
ppp-ioctl.h
ppp_defs.h
pps.h
prctl.h
ptp_clock.h
ptrace.h	ptrace: add ability to get/set signal-blocked mask	2013-07-03 16:08:01 -07:00
qnx4_fs.h
qnxtypes.h
quota.h
radeonfb.h
random.h
raw.h
rds.h
reboot.h
reiserfs_fs.h
reiserfs_xattr.h	xattr: Constify ->name member of "struct xattr".	2013-07-25 19:30:03 +10:00
resource.h
rfkill.h
romfs_fs.h
rose.h
route.h
rtc.h
rtnetlink.h	tcp: introduce a per-route knob for quick ack	2013-06-19 23:06:51 -07:00
scc.h
sched.h
screen_info.h
sctp.h	net: sctp: trivial: update mailing list address	2013-07-24 17:53:38 -07:00
sdla.h
seccomp.h
securebits.h
selinux_netlink.h
sem.h
serial.h
serial_core.h	Merge git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile	2013-09-06 11:14:33 -07:00
serial_reg.h	Revert "OMAP: UART: Keep the TX fifo full when possible"	2013-08-27 16:02:18 -07:00
serio.h
shm.h
signal.h
signalfd.h
snmp.h	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2013-08-16 15:37:26 -07:00
sock_diag.h
socket.h
sockios.h
som.h
sonet.h
sonypi.h
sound.h
soundcard.h
stat.h
stddef.h
string.h
suspend_ioctls.h
swab.h
synclink.h
sysctl.h
sysinfo.h
taskstats.h
tcp.h	tcp: TCP_NOTSENT_LOWAT socket option	2013-07-24 17:54:48 -07:00
tcp_metrics.h
telephony.h
termios.h
time.h
times.h
timex.h
tiocl.h
tipc.h	tipc: update code comments to reflect new uapi header path	2013-06-17 15:53:00 -07:00
tipc_config.h	tipc: update code comments to reflect new uapi header path	2013-06-17 15:53:00 -07:00
toshiba.h
tty.h
tty_flags.h
types.h
udf_fs_i.h
udp.h
uhid.h	HID: uhid: use generic hidinput_input_event()	2013-07-31 10:33:05 +02:00
uinput.h
uio.h
ultrasound.h
un.h
unistd.h
unix_diag.h
usbdevice_fs.h
utime.h
utsname.h
uuid.h
uvcvideo.h
v4l2-common.h
v4l2-controls.h	[media] V4L: Add VP8 encoder controls	2013-08-18 07:13:36 -03:00
v4l2-dv-timings.h	[media] v4l2-dv-timings.h: remove duplicate V4L2_DV_BT_DMT_1366X768P60	2013-08-18 08:13:51 -03:00
v4l2-mediabus.h	[media] v4l: Add media format codes for ARGB8888 and AYUV8888 on 32-bit busses	2013-08-18 07:23:07 -03:00
v4l2-subdev.h
veth.h
vfio.h	vfio-pci: PCI hot reset interface	2013-09-04 11:28:04 -06:00
vhost.h
videodev2.h	[media] videodev2.h: defines to calculate blanking and frame sizes	2013-08-18 08:17:35 -03:00
virtio_9p.h
virtio_balloon.h
virtio_blk.h
virtio_config.h	virtio: VIRTIO_F_ANY_LAYOUT feature	2013-07-09 10:47:45 +09:30
virtio_console.h	Simple warning fix for module sections. If too late to pull, no big deal.	2013-07-03 13:09:06 -07:00
virtio_ids.h
virtio_net.h	uapi: Convert some uses of 6 to ETH_ALEN	2013-08-02 12:33:54 -07:00
virtio_pci.h	virtio_pci: better macro exported in uapi	2013-05-20 12:08:09 +09:30
virtio_ring.h
virtio_rng.h
vm_sockets.h
vt.h
wait.h
wanrouter.h
watchdog.h
wimax.h
wireless.h
x25.h
xattr.h
xfrm.h