Nicolas Pitre
c1a95fda2a
kbuild: add fine grained build dependencies for exported symbols ...
Like with kconfig options, we now have the ability to compile in and
out individual EXPORT_SYMBOL() declarations based on the content of
include/generated/autoksyms.h. However we don't want the entire
world to be rebuilt whenever that file is touched.
Let's apply the same build dependency trick used for CONFIG_* symbols
where the time stamp of empty files whose paths matching those symbols
is used to trigger fine grained rebuilds. In our case the key is the
symbol name passed to EXPORT_SYMBOL().
However, unlike config options, we cannot just use fixdep to parse
the source code for EXPORT_SYMBOL(ksym) because several variants exist
and parsing them all in a separate tool, and keeping it in synch, is
not trivially maintainable. Furthermore, there are variants such as
EXPORT_SYMBOL_GPL(pci_user_read_config_##size);
that are instanciated via a macro for which we can't easily determine
the actual exported symbol name(s) short of actually running the
preprocessor on them.
Storing the symbol name string in a special ELF section doesn't work
for targets that output assembly or preprocessed source.
So the best way is really to leverage the preprocessor by having it
output actual symbol names anchored by a special sequence that can be
easily filtered out. Then the list of symbols is simply fed to fixdep
to be merged with the other dependencies.
That implies the preprocessor is executed twice for each source file.
A previous attempt relied on a warning pragma for each EXPORT_SYMBOL()
instance that was filtered apart from stderr by the build system with
a sed script during the actual compilation pass. Unfortunately the
preprocessor/compiler diagnostic output isn't stable between versions
and this solution, although more efficient, was deemed too fragile.
Because of the lowercasing performed by fixdep, there might be name
collisions triggering spurious rebuilds for similar symbols. But this
shouldn't be a big issue in practice. (This is the case for CONFIG_*
symbols and I didn't want to be different here, whatever the original
reason for doing so.)
To avoid needless build overhead, the exported symbol name gathering is
performed only when CONFIG_TRIM_UNUSED_KSYMS is selected.
Signed-off-by: Nicolas Pitre <nico@linaro.org>
Acked-by: Rusty Russell <rusty@rustcorp.com.au>
2016-03-29 16:30:56 -04:00
bcma: move parallel flash support to separated file
2016-03-07 14:41:08 +02:00
ceph: fix security xattr deadlock
2016-03-25 18:51:55 +01:00
The clk changes for this release cycle are mostly dominated by
2016-03-23 06:06:45 -07:00
powerpc/rcpm: add RCPM driver
2016-03-04 23:50:27 -06:00
MMC core:
2016-03-21 14:35:52 -07:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next
2016-03-19 10:05:34 -07:00
Round two of 4.6 merge window patches
2016-03-22 15:48:44 -07:00
mtd: nand: don't select chip in nand_chip's block_bad op
2016-03-10 10:52:21 -08:00
MTD updates for v4.6
2016-03-24 19:57:15 -07:00
power supply and reset changes for the v4.6 series
2016-03-17 12:50:55 -07:00
qed/qede: Add infrastructure support for hardware GRO
2016-03-07 15:01:39 -05:00
Merge remote-tracking branches 'regulator/topic/discharge', 'regulator/topic/fan53555', 'regulator/topic/gpio', 'regulator/topic/hi655x' and 'regulator/topic/lp872x' into regulator-next
2016-03-13 15:19:35 +07:00
mm: move max_map_count bits into mm.h
2016-03-17 15:09:34 -07:00
Merge branch 'mailbox-for-next' of git://git.linaro.org/landing-teams/working/fujitsu/integration
2016-03-23 06:09:15 -07:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input
2016-03-17 21:51:52 -07:00
Various bugfixes, a RDMA update from Chuck Lever, and support for a new
2016-03-24 10:41:00 -07:00
include/linux/unaligned: force inlining of byteswap operations
2016-03-17 15:09:34 -07:00
USB: core: let USB device know device node
2016-03-05 12:05:01 -08:00
tty/serial: at91: fix bad offset for UART timeout register
2016-03-07 16:11:14 -08:00
powerpc updates for 4.6
2016-03-19 15:38:41 -07:00
autofs4: fix string.h include in auto_dev-ioctl.h
2016-03-15 16:55:16 -07:00
autofs4: coding style fixes
2016-03-15 16:55:16 -07:00
block: don't optimize for non-cloned bio in bio_get_last_bvec()
2016-03-12 14:12:10 -07:00
blk-mq: Use proper cpumask iterator
2016-03-20 09:34:02 -06:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2016-03-19 18:52:29 -07:00
bpf: convert stackmap to pre-allocation
2016-03-08 15:28:31 -05:00
bufferhead: force inlining of buffer head flag operations
2016-03-17 15:09:34 -07:00
cred/userns: define current_user_ns() as a function
2016-03-22 15:36:02 -07:00
crypto: ccp - CCP versioning support
2016-03-11 21:19:16 +08:00
cgroup: ignore css_sets associated with dead cgroups during migration
2016-03-16 13:31:46 -07:00
mm, compaction: introduce kcompactd
2016-03-17 15:09:34 -07:00
compat: add in_compat_syscall to ask whether we're in a compat syscall
2016-03-22 15:36:02 -07:00
Merge commit 'fixes.2015.02.23a' into core/rcu
2016-03-15 09:01:06 +01:00
configfs: switch ->default groups to a linked list
2016-03-06 16:11:24 +01:00
Merge branch 'pm-cpufreq-governor' into pm-cpufreq
2016-03-10 20:46:03 +01:00
cpumask: remove incorrect information from comment
2016-03-22 15:36:02 -07:00
cred/userns: define current_user_ns() as a function
2016-03-22 15:36:02 -07:00
Merge tag 'for-f2fs-4.6' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs
2016-03-21 11:03:02 -07:00
dm snapshot: disallow the COW and origin devices from being identical
2016-03-10 17:12:09 -05:00
The clk changes for this release cycle are mostly dominated by
2016-03-23 06:06:45 -07:00
dma-buf, drm, ion: Propagate error code from dma_buf_start_cpu_access()
2016-03-19 11:03:49 +01:00
virtio/vhost: new features, performance improvements, cleanups
2016-03-20 13:28:18 -07:00
Merge branch 'topic/pl330' into for-linus
2016-03-14 11:18:12 +05:30
Merge branch 'efi-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2016-03-20 18:58:18 -07:00
kbuild: add fine grained build dependencies for exported symbols
2016-03-29 16:30:56 -04:00
mm: fault-inject take over bootstrap kmem_cache check
2016-03-15 16:55:16 -07:00
Merge branch 'drm-next' of git://people.freedesktop.org/~airlied/linux
2016-03-25 08:48:31 -07:00
timer: convert timer_slack_ns from unsigned long to u64
2016-03-17 15:09:34 -07:00
fs/coredump: prevent fsuid=0 dumps into user-controlled directories
2016-03-22 15:36:02 -07:00
Merge tag 'for-f2fs-4.6' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs
2016-03-21 11:03:02 -07:00
untangle fsnotify_d_instantiate() a bit
2016-03-14 00:17:28 -04:00
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
2016-03-19 18:52:29 -07:00
arch, ftrace: for KASAN put hard/soft IRQ entries into separate sections
2016-03-25 16:37:42 -07:00
mm: exclude ZONE_DEVICE from GFP_ZONE_TABLE
2016-03-17 15:09:34 -07:00
timer: convert timer_slack_ns from unsigned long to u64
2016-03-17 15:09:34 -07:00
powerpc updates for 4.6
2016-03-19 15:38:41 -07:00
bridge: allow zero ageing time
2016-03-11 14:58:58 -05:00
arch, ftrace: for KASAN put hard/soft IRQ entries into separate sections
2016-03-25 16:37:42 -07:00
memremap: add MEMREMAP_WC flag
2016-03-22 15:36:02 -07:00
libnvdimm for 4.6
2016-03-16 17:45:56 -07:00
Merge branch 'irq-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2016-03-15 12:48:48 -07:00
Staging driver patches for 4.6-rc1
2016-03-17 22:13:41 -07:00
iscsi_ibft: Add prefix-len attr and display netmask
2016-03-14 10:30:57 -04:00
mm, kasan: add GFP flags to KASAN API
2016-03-25 16:37:42 -07:00
kernel: add kcov code coverage
2016-03-22 15:36:02 -07:00
Nothing major this round. Mostly small clean ups and fixes.
2016-03-24 10:52:25 -07:00
kfifo: fix sparse complaints
2016-03-22 15:36:02 -07:00
leds: core: avoid error message when a USB LED device is unplugged
2016-03-14 09:22:20 +01:00
nfit: disable userspace initiated ars during scrub
2016-03-05 12:24:06 -08:00
nvme: lightnvm: return ppa completion status
2016-03-18 18:10:38 -07:00
list: kill list_force_poison()
2016-03-09 15:43:42 -08:00
include/linux/list_bl.h: use bool instead of int for boolean functions
2016-03-17 15:09:34 -07:00
livepatch/module: remove livepatch module notifier
2016-03-17 09:45:10 +01:00
bus: mvebu-mbus: provide api for obtaining IO and DRAM window information
2016-03-14 12:19:46 -04:00
mm: workingset: make shadow node shrinker memcg aware
2016-03-17 15:09:34 -07:00
Char/Misc patches for 4.6-rc1
2016-03-17 13:47:50 -07:00
mm/compaction: speed up pageblock_pfn_to_page() when zone is contiguous
2016-03-15 16:55:16 -07:00
mm, page_owner: track and print last migrate reason
2016-03-15 16:55:16 -07:00
isdn: Use ktime_t instead of 'struct timeval'
2016-03-20 16:47:13 -04:00
mm, oom: introduce oom reaper
2016-03-25 16:37:42 -07:00
mm, debug: move bad flags printing to bad_page()
2016-03-15 16:55:16 -07:00
mm: scale kswapd watermarks in proportion to memory
2016-03-17 15:09:34 -07:00
namei: teach lookup_slow() to skip revalidate
2016-03-14 00:15:46 -04:00
libnvdimm: async notification support
2016-03-05 12:24:06 -08:00
net: Make sock_alloc exportable
2016-03-09 16:36:13 -05:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
2016-03-23 23:25:14 -07:00
nfs4.h: add SCSI layout definitions
2016-03-17 14:57:16 -04:00
x86/apic: Remove declaration of unused hw_nmi_is_cpu_stuck
2016-03-23 12:34:17 +01:00
NTB: Make _addr functions optional in the API
2016-03-21 19:30:06 -04:00
DeviceTree updates for 4.6:
2016-03-19 15:15:07 -07:00
include/linux/oom.h: remove undefined oom_kills_count()/note_oom_kill()
2016-03-25 16:37:42 -07:00
mm: exclude ZONE_DEVICE from GFP_ZONE_TABLE
2016-03-17 15:09:34 -07:00
include/linux/page-flags.h: force inlining of selected page flag modifications
2016-03-17 15:09:34 -07:00
mm, page_owner: track and print last migrate reason
2016-03-15 16:55:16 -07:00
mm, page_owner: dump page owner info from dump_page()
2016-03-15 16:55:16 -07:00
mm/page_ref: add tracepoint to track down page reference manipulation
2016-03-17 15:09:34 -07:00
mm: introduce page reference manipulation functions
2016-03-17 15:09:34 -07:00
PCI: Consolidate PCI DMA constants and interfaces in linux/pci-dma-compat.h
2016-03-07 11:39:16 -06:00
powerpc updates for 4.6
2016-03-19 15:38:41 -07:00
PCI: Add PCI_CLASS_SERIAL_USB_DEVICE definition
2016-03-15 08:52:28 -05:00
Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2016-03-24 10:02:14 -07:00
phy: remove documentation of removed members of phy_device structure
2016-03-13 22:11:43 -04:00
phy: fixed: Fix removal of phys.
2016-03-14 15:43:11 -04:00
PM / clk: Add support for obtaining clocks from device-tree
2016-03-17 02:32:04 +01:00
libnvdimm, pmem: clear poison on write
2016-03-09 15:15:32 -08:00
mm/page_poisoning.c: allow for zero poisoning
2016-03-15 16:55:16 -07:00
timer: convert timer_slack_ns from unsigned long to u64
2016-03-17 15:09:34 -07:00
pstore: Add support for 64 Bit address space
2016-03-10 09:43:36 -08:00
ptp: Add PTP_SYS_OFFSET_PRECISE for driver crosstimestamping
2016-03-03 14:23:43 -08:00
fix Christoph's email addresses
2016-03-17 15:09:34 -07:00
radix-tree,shmem: introduce radix_tree_iter_next()
2016-03-17 15:09:34 -07:00
rcu: Add list_next_or_null_rcu
2016-03-09 16:36:13 -05:00
Merge branch 'smp-hotplug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
2016-03-15 13:50:29 -07:00
Merge remote-tracking branch 'regmap/topic/update-bits' into regmap-next
2016-03-05 21:30:41 +09:00
rapidio: add outbound window support
2016-03-22 15:36:02 -07:00
rapidio: add outbound window support
2016-03-22 15:36:02 -07:00
rapidio: add mport char device driver
2016-03-22 15:36:02 -07:00
rapidio: add query_mport operation
2016-03-22 15:36:02 -07:00
mm: make remove_migration_ptes() beyond mm/migration.c
2016-03-17 15:09:34 -07:00
Input: synaptics-rmi4 - add SPI transport driver
2016-03-10 16:04:24 -08:00
rtc: Add functions to set and read rtc offset
2016-03-14 17:08:15 +01:00
oom, oom_reaper: protect oom_reaper_list using simpler way
2016-03-25 16:37:42 -07:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
2016-03-08 12:34:12 -05:00
mm, kasan: add GFP flags to KASAN API
2016-03-25 16:37:42 -07:00
mm, kasan: SLAB support
2016-03-25 16:37:42 -07:00
mm, kasan: SLAB support
2016-03-25 16:37:42 -07:00
kcm: Kernel Connection Multiplexor module
2016-03-09 16:36:14 -05:00
mm, kasan: stackdepot implementation. Enable stackdepot for SLAB
2016-03-25 16:37:42 -07:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net
2016-03-08 12:34:12 -05:00
lib: move strtobool() to kstrtobool()
2016-03-17 15:09:34 -07:00
vfs: vfs: Define new syscalls preadv2,pwritev2
2016-03-04 12:20:10 -05:00
tcp: Add RFC4898 tcpEStatsPerfDataSegsOut/In
2016-03-14 14:55:26 -04:00
Thermal: Ignore invalid trip points
2016-03-18 14:10:57 +08:00
param: convert some "on"/"off" users to strtobool
2016-03-17 15:09:34 -07:00
Nothing major this round. Mostly small clean ups and fixes.
2016-03-24 10:52:25 -07:00
tracepoints: move trace_print_flags definitions to tracepoint-defs.h
2016-03-15 16:55:16 -07:00
tracing: Fix check for cpu online when event is disabled
2016-03-09 11:58:41 -05:00
thp, vmstats: count deferred split events
2016-03-17 15:09:34 -07:00
watchdog: Add support for minimum time between heartbeats
2016-03-16 21:11:19 +01:00
