ee2b511e1f
cns3xxx: prevent the ethernet driver from accessing uninitialized dma descriptor entries
...
SVN-Revision: 35950
2013-03-10 21:59:28 +00:00
d22ac8d8fb
cns3xxx: minor ethernet driver cleanup
...
SVN-Revision: 35949
2013-03-10 21:59:21 +00:00
e1f24d99e1
brcm47xx: refresh config
...
SVN-Revision: 35948
2013-03-10 20:42:26 +00:00
89d4fceee2
xburst: fix compilation: remove the __dev attributes
...
SVN-Revision: 35946
2013-03-10 20:26:28 +00:00
45b24fa771
kernel: add some missing config options found by the buildbot.
...
SVN-Revision: 35945
2013-03-10 20:25:19 +00:00
9facda9570
cns3xxx: use kmalloc instead of kzalloc for ethernet rx buffers
...
SVN-Revision: 35943
2013-03-10 18:25:20 +00:00
c44506fcbd
cns3xxx: fix an rx irq handling corner case
...
When an rx interrupt comes in, rx interrupts are disabled and NAPI
polling is scheduled. During the NAPI poll, the driver first processes
received frames in the ring, then fills the dma descriptor slots with
new buffers and calls tx complete, before finally re-enabling rx
interrupts and completing NAPI (if below the budget).
If the hardware rx queue overflows before the napi complete is called,
the hardware will not throw any further rx interrupts and rx processing
stops completely.
Fix this by keeping NAPI polling scheduled until it completes a poll
without receiving any packets, and also handle NAPI completion before
refilling rx or completing tx.
SVN-Revision: 35942
2013-03-10 18:25:16 +00:00
c1adc79328
cns3xxx: fix ethernet driver memory barrier usage
...
SVN-Revision: 35941
2013-03-10 18:25:11 +00:00
9a71711d39
realview: remove 3.3 support
...
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 35940
2013-03-10 18:06:31 +00:00
35dd42f976
realview: switch to 3.8
...
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 35939
2013-03-10 18:06:29 +00:00
53e0f10246
kernel: prevent -f*-sections from leaking into the boot zImage wrapper on arm
...
SVN-Revision: 35938
2013-03-10 17:04:36 +00:00
2b83c9bd8a
kernel: ensure that the arm exception handlers get preserved
...
SVN-Revision: 35937
2013-03-10 17:04:31 +00:00
f0d7ba33ef
kernel: use -ffunction-sections, -fdata-sections and --gc-sections on ARM to reduce kernel image size, disable those flags when tracing on MIPS to fix compile errors
...
SVN-Revision: 35936
2013-03-10 14:51:42 +00:00
5b3ab0e21e
xburst: remove 3.3 support
...
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 35934
2013-03-10 13:24:54 +00:00
00caedf86e
xburst: switch to 3.8
...
Compile tested only, so add broken flag.
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 35933
2013-03-10 13:24:52 +00:00
8942d4dc04
xburst: add support for 3.8
...
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 35932
2013-03-10 13:24:50 +00:00
15718f5387
linux/3.8: add missing config symbols
...
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 35931
2013-03-10 13:24:47 +00:00
f25c050aa9
adm5120: remove 3.7 support
...
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 35930
2013-03-10 13:24:46 +00:00
5502bbe2ca
adm5120: switch to 3.8
...
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 35929
2013-03-10 13:24:45 +00:00
c42da71d8b
malta: remove 3.7 support
...
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 35928
2013-03-10 13:24:44 +00:00
6720fc6952
malta: switch to 3.8
...
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 35927
2013-03-10 13:24:43 +00:00
82dc64b19b
atheros: remove 3.3 support
...
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 35926
2013-03-10 13:24:42 +00:00
5b8e106ae6
atheros: switch to 3.8
...
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 35925
2013-03-10 13:24:40 +00:00
ce5806378e
mpc83xx: remove 3.7 support
...
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 35924
2013-03-10 13:24:39 +00:00
c79c132229
mpc83xx: switch to 3.8
...
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 35923
2013-03-10 13:24:38 +00:00
27ba973c06
rb532: remove 3.7 support
...
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 35922
2013-03-10 13:21:40 +00:00
501e4d331d
rb532: switch to 3.8
...
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 35921
2013-03-10 13:21:33 +00:00
8223205a29
rb532: add support for 3.8
...
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 35920
2013-03-10 13:21:29 +00:00
e8a5312bef
ar71xx: correct board name to make LEDs work on RB750
...
Patch by: Denver A <denvera@gmail.com>
Patchwork: http://patchwork.openwrt.org/patch/3419/
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 35919
2013-03-10 07:20:57 +00:00
d85ffaabe9
ppc40x: remove __dev_{in,ex}it annotations
...
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 35918
2013-03-10 07:20:54 +00:00
446409f43e
cns3xxx: reduce buffer allocation size to 2048 bytes, improves ethernet performance
...
SVN-Revision: 35917
2013-03-10 01:27:04 +00:00
95431b7843
cns3xxx: remove linux 3.3 support
...
SVN-Revision: 35916
2013-03-10 01:01:55 +00:00
3d919b7c08
cns3xxx: disable CONFIG_PROC_STRIPPED and add an init script to set the ethernet cpu affinity (improves lan<->wlan bridging performance)
...
SVN-Revision: 35915
2013-03-10 01:01:51 +00:00
44ed7d664a
brcm47xx: add some more partition parser fixes by Rafał Miłecki
...
SVN-Revision: 35912
2013-03-09 19:48:03 +00:00
694050a4cf
brcm47xx: netconfig: add bacis support for swconfig
...
Parse the cpu port from swconfig and explicitly mark the cpu port as tagged.
SVN-Revision: 35911
2013-03-09 19:24:43 +00:00
72af5b4b35
kernel: add a missing config symbol for 3.8
...
SVN-Revision: 35910
2013-03-09 19:04:37 +00:00
95f14d052a
cns3xxx: add linux 3.8 support and use it by default
...
SVN-Revision: 35908
2013-03-09 18:51:46 +00:00
85348d602e
kernel: fix mpcore watchdog symbol export
...
SVN-Revision: 35907
2013-03-09 18:51:39 +00:00
938361b055
cns21xx: remove 3.7 support
...
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 35886
2013-03-04 16:08:41 +00:00
a61431b154
cns21xx: switch to 3.8
...
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 35885
2013-03-04 16:08:39 +00:00
3e3fc552bc
ppc44x: remove 3.7 support
...
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 35884
2013-03-04 15:16:37 +00:00
d24041665c
ppc44x: switch to 3.8
...
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 35883
2013-03-04 15:16:35 +00:00
c67127ad23
ppc40x: remove 3.7 support
...
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 35882
2013-03-04 15:16:33 +00:00
341b5ba939
ppc40x: switch to 3.8
...
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 35881
2013-03-04 15:16:32 +00:00
b412a81524
brcm63xx: fix LED names for various boards
...
Signed-off-by: Florian Fainelli <florian@openwrt.org>
SVN-Revision: 35880
2013-03-04 13:42:35 +00:00
947bc9d36f
ar71xx: add backported watchdog patches
...
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 35879
2013-03-04 12:08:28 +00:00
1d55249d7c
ar71xx: use backported QCA955x patches
...
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 35878
2013-03-04 11:48:15 +00:00
64a9fe2894
ar71xx: use backported PCI patches
...
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 35877
2013-03-04 11:48:08 +00:00
12d49b5195
ar71xx: use backported MISC IRQ patch
...
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 35876
2013-03-04 11:48:06 +00:00
4c31b9f43e
ar71xx: use backported GPIO patches
...
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 35875
2013-03-04 11:48:04 +00:00
120028af99
ar71xx: enable building ramdisk images for WZRHPG30XNH board types
...
Signed-off-by: Luka Perkov <luka@openwrt.org>
Acked-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 35874
2013-03-04 11:37:28 +00:00
0ad50b0bec
ar71xx: use backported SPI patches
...
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 35873
2013-03-04 09:40:44 +00:00
c28cdfab31
mpc85xx: remove 3.7 support
...
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 35872
2013-03-04 09:37:25 +00:00
84e960f7aa
mpc85xx: switch to 3.8
...
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 35871
2013-03-04 09:37:24 +00:00
3ee484d54c
ar71xx: remove 3.7 support
...
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 35870
2013-03-04 09:03:50 +00:00
d5adb0dbdd
ar71xx: switch to 3.8
...
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 35869
2013-03-04 08:47:38 +00:00
a87a96da67
kernel: update linux 3.8 to 3.8.2
...
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 35868
2013-03-04 08:43:55 +00:00
a5ebfc79ba
ar71xx: rework changes from r35840
...
Signed-off-by: Luka Perkov <luka@openwrt.org>
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 35865
2013-03-03 21:59:34 +00:00
26fbc15a86
kernel: update linux 3.8 to 3.8.1
...
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 35862
2013-03-03 13:58:52 +00:00
da79a4c698
linux/3.8: add missing config symbols
...
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 35861
2013-03-03 13:58:10 +00:00
23b3b3a194
kernel: update linux 3.7 to 3.7.10
...
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 35860
2013-03-03 13:57:40 +00:00
4491da2bd4
ar71xx: update MAC address assignment for dir-825-c1
...
Signed-off-by: Alexander Stadler <sa.maillists@univie.ac.at>
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 35855
2013-03-03 12:47:37 +00:00
200aa6db83
ar71xx: fixes leds for dir-825-c1
...
Signed-off-by: Alexander Stadler <sa.maillists@univie.ac.at>
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 35854
2013-03-03 12:47:33 +00:00
8798c73860
ramips: set -march=24kec for rt305x and rt3883 to enable use of DSP extension
...
All known rt305x and rt3883 implementations support at
least the 24kec instruction set which includes the DSP
extension. For rt288x, the previous value mips32r2 is
kept.
The cpu target is now set per sub-archtecture, according
to cpu-feature-overrides.h of each SoC family.
[juhosg: define ARCH_PACKAGES variable for rt305x/rt3883
in order to differentiate the packages compiled with
the 24Kec option.]
Signed-off-by: Daniel Golle <dgolle@allnet.de>
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 35853
2013-03-03 12:47:31 +00:00
59ad675ef1
ramips: add user-space detection for ALL5002/ALL5003
...
Signed-off-by: Daniel Golle <dgolle@allnet.de>
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 35852
2013-03-03 12:47:28 +00:00
50e51e5ecc
ramips: indicate support for ALL5003
...
add ALL5003 to board description in mach-all5002.c
adapt detection in user-space accordingly
(no functional changes)
Signed-off-by: Daniel Golle <dgolle@allnet.de>
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 35851
2013-03-03 12:47:25 +00:00
367ab0a40f
ramips: enhance user-space board detection
...
Similar to ar71xx, detect only once and cache the strings in
/tmp/sysinfo/model and /tmp/sysinfo/boardname.
Signed-off-by: Daniel Golle <dgolle@allnet.de>
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 35850
2013-03-03 12:47:02 +00:00
1ba2272ca5
ramips: fix whitespace in /lib/ramips.sh
...
Signed-off-by: Daniel Golle <dgolle@allnet.de>
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 35849
2013-03-03 12:46:08 +00:00
a9c584c277
Revert "[cns3xxx]: clean up PCI bus topology" (r35079)
...
It breaks PCIe IRQ mapping and possibly other things
SVN-Revision: 35842
2013-03-02 00:32:54 +00:00
107e0c6d1f
ar71xx: add support for Buffalo WZR 600DHP
...
Signed-off-by: Luka Perkov <luka@openwrt.org>
SVN-Revision: 35840
2013-03-01 13:46:01 +00:00
04af8bd108
brcm47xx: bgmac: omit the fcs
...
This fixes #13058 and hopefully #12927
SVN-Revision: 35834
2013-02-28 13:27:21 +00:00
9805096f48
brcm47xx: bgmac: update to version form netdev git repository
...
SVN-Revision: 35833
2013-02-28 13:24:39 +00:00
5412b6f32e
ramips: add support for 3.8
...
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 35801
2013-02-25 21:28:42 +00:00
a08646642e
ramips: image: don't break make process if mkimage command fails
...
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 35800
2013-02-25 21:28:40 +00:00
275db5b4c4
ramips: remove port_power_off field from ehci_platform_data
...
It is removed in 3.8. Also add a revert patch for 3.7.
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 35799
2013-02-25 21:28:38 +00:00
5e1d6ce077
ramips: remove __dev_{init,exit} annotations
...
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 35798
2013-02-25 21:28:34 +00:00
2c34e1aba5
brcm47xx: use bcm47xx_board_get() and detect some more boards in flash partition driver
...
SVN-Revision: 35791
2013-02-25 20:56:37 +00:00
5d3b728372
brcm47xx: board detection WNDR3400v2
...
WNDR3400v2 is based on BCM53xx . Image that is created breaks the router somehow therefore "#".
CFE and NVRAM contain different vars - example:
CFE line original: Device eth0: hwaddr 74-44-01-37-C6-69, ipaddr 192.168.1.1, mask 255.255.255.0
CFE after openwrt: Device eth0: hwaddr 00-FF-FF-FF-FF-FF, ipaddr 192.168.1.1, mask 255.255.255.0
Logs were posted earlier on this mailing list: https://lists.openwrt.org/pipermail/openwrt-devel/2012-July/016174.html
Different logs with factory firmware are in the wiki: http://wiki.openwrt.org/toh/netgear/wndr3400#wndr3400v2
(and on wikidevi for example)
Signed off by: Dirk Neukirchen <dirkneukirchen@web.de>
SVN-Revision: 35790
2013-02-25 20:55:46 +00:00
f7879cd8d8
ar71xx: add profile and build image fot the TL-WA830RE v1 board
...
Added support for the TP-LINK TL-WA830RE v1 Range Extender.
Based on the WA901ND v1 support. Hardware IDs checked against
original firmware. Patch was successfully tested on hardware.
Signed-off-by: Ronald Hecht <ronald.hecht@gmx.de>
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 35789
2013-02-25 20:37:35 +00:00
ea71239d8a
ar71xx: add model detection for the TL-WA830RE board
...
Signed-off-by: Ronald Hecht <ronald.hecht@gmx.de>
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 35788
2013-02-25 20:37:33 +00:00
0f2fc0adfd
brcm47xx: use same board detection code as kernel 3.8
...
SVN-Revision: 35770
2013-02-24 18:10:42 +00:00
05de472518
adm5120: add support for 3.8
...
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 35769
2013-02-24 18:08:14 +00:00
3d65d0291c
adm5120: remove __dev{init,exit} annotations
...
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 35768
2013-02-24 18:08:03 +00:00
0ab5ab2c08
adm5120: remove a superfluous patch
...
The NO_IRQ symbol is not used by the amba core since
upstream commit:
dfb85185bda373a70409c70c2632b02fb0f8f449
AMBA: get rid of last two uses of NO_IRQ
This gets rid of the last two users of NO_IRQ in AMBA primecell
drivers.
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 35748
2013-02-22 16:01:19 +00:00
6419ffd20d
adm5120: avoid warning caused by wrong AMBA irq values
...
The amba core throws a warning if -1 is used as an
irq value since upstream commit:
2eac58d5026e4ec8b17ff8b62877fea9e1d2f1b3
ARM: amba: make use of -1 IRQs warn
Make the core warn about the use of -1 (NO_IRQ)
Cange the value of the unused IRQs to zero for the
UART devices to get rid of the warning.
Based on #12729 .
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 35747
2013-02-22 16:01:17 +00:00
42cdd3bef4
cns21xx: add support for 3.8
...
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 35737
2013-02-21 20:45:24 +00:00
9ec9adf3ea
mpc83xx: add support for 3.8
...
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 35736
2013-02-21 20:39:22 +00:00
c50881d7ba
ppc44x: add support for 3.8
...
Compile tested only.
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 35735
2013-02-21 19:23:31 +00:00
fd645abca4
ppc40x: add support for 3.8
...
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 35734
2013-02-21 19:23:29 +00:00
4da13625d5
mpc85xx: add user-space support for the TL-WDR4900 v1
...
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 35733
2013-02-21 19:20:34 +00:00
bd2c77b264
mpc85xx: update 3.8 config
...
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 35732
2013-02-21 18:44:40 +00:00
bcac3c5569
ar71xx: fix MAC address assignment on the DIR-825-Bx boards
...
Use the same MAC addresses as the original firmware.
Based on a patch from #10421 .
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
Tested-by: Gabor Varga <vargagab@gmail.com>
SVN-Revision: 35730
2013-02-21 17:58:21 +00:00
d785803bfa
mpc85xx: add support for 3.8
...
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 35729
2013-02-21 17:48:31 +00:00
cf2324fd6b
ar71xx: add support for 3.8
...
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 35728
2013-02-21 17:47:15 +00:00
9cc3a60b5a
atheros: add support for linux kernel v3.8
...
This builds and boots.
Because of the function pointer indirection (e.g. mtd_info's read
function pointer is assigned to spiflash_read), it is difficult for me
to understand where the calls are coming from (could be anywhere,
conditionally pointing at spiflash versions), so I punted and used the
renamed function pointers (_erase, _read, _write). If someone knows
better what to do, please fix.
Cleaned up other sundry kernel tracking issues like get_phy_id and
__devinit,etc.
[juhosg: don't switch to that yet]
Signed-off-by: Russell Senior <russell@personaltelco.net>
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 35727
2013-02-21 17:45:54 +00:00
babd5aa2fc
linux/3.8: add missing config symbols
...
Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
SVN-Revision: 35726
2013-02-21 16:52:34 +00:00
ff20c0e1fc
bcm63xx: Fix sysupgrade for tag-version 7 and 8
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Fix sysupgrade for tag-version 7 and 8.
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
SVN-Revision: 35724
2013-02-21 11:45:41 +00:00
3010a0b616
generic: b53: clear SM_SW_FWD_MODE unconditionally when enabling VLAN
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Setting this bit stops BCM53125 (bgmac actually) from receiving any
packets. This bit is cleared conditionally in b53_switch_reset and it
seems the same is done in bcmrobo.c which never sets that bit again.
Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
SVN-Revision: 35723
2013-02-21 11:45:38 +00:00
23e71c56ba
generic: b53: remove empty spaces
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Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
SVN-Revision: 35722
2013-02-21 11:45:36 +00:00
1cd62d06ca
ramips: print image build warnings/errors to stderr
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Makes warnings/errors visible when building with V=w/V=1.
Signed-off-by: Jonas Gorski <jogo@openwrt.org>
SVN-Revision: 35721
2013-02-21 11:45:33 +00:00
Felix Fietkau
Hauke Mehrtens
Gabor Juhos
Florian Fainelli
Luka Perkov
Jonas Gorski