* coccinelle & linux-kernel: unindent blocks by reversing tests?
@ 2018-03-18 16:51 Joe Perches
[not found] ` <alpine.DEB.2.20.1803181848370.2420@hadrien>
0 siblings, 1 reply; 2+ messages in thread
From: Joe Perches @ 2018-03-18 16:51 UTC (permalink / raw)
To: cocci; +Cc: LKML, kernel-janitors
There are many blocks of code that could be
unindented and so neatened by reversing tests.
For instance, here are linux-kernel void functions
with deep indentation at the end of the function
definition.
These functions are all similar to:
void foo(...)
{
[code...]
if (foo) {
[...]
if (bar) {
[...]
if (baz) }
[...]
if (quz) {
[...]
}
}
}
}
}
These blocks could be written
void foo(...)
{
[code...]
if (!foo)
return;
[
...]
if (!bar)
return;
[...]
if (!baz)
return;
[...]
if (!quz)
return;
[...]
}
Which often saves many vertical lines by reducing
now unnecessary line-wrapping done at 80-columns.
The actual grep below looks only for the closing
brace uses and many if the ifs in the sample above
could be do/for/while/switch uses instead of if.
Many of these could be line-count reduced by
avoiding many 80 column line wrapping uses if the
tests that precede these closing braces were
reversed followed by return or a test in a loop
were modified by a reversed test with continue use.
Any coccinelle possibilities here?
$ grep-2.5.4 -n -rP --include=*.[ch] '\t\t\t\t}\n\t\t\t}\n\t\t}\n\t}\n}\n' * | grep /
arch/x86/pci/early.c:108: }
arch/um/kernel/irq.c:99: }
drivers/net/wireless/realtek/rtlwifi/rtl8821ae/phy.c:1190: }
drivers/net/wireless/realtek/rtlwifi/rc.c:267: }
drivers/net/wireless/broadcom/b43/phy_n.c:1833: }
drivers/net/wireless/broadcom/brcm80211/brcmsmac/phy/phy_n.c:15085: }
drivers/net/wireless/broadcom/brcm80211/brcmsmac/phy/phy_n.c:18273: }
drivers/net/ethernet/marvell/mvneta.c:2644: }
drivers/net/ethernet/qlogic/qlcnic/qlcnic_83xx_init.c:1866: }
drivers/net/ethernet/freescale/fman/fman_sp.c:78: }
drivers/net/ethernet/broadcom/bnx2x/bnx2x_ethtool.c:878: }
drivers/net/ethernet/broadcom/bnx2x/bnx2x_init.h:457: }
drivers/net/ethernet/intel/ixgbe/ixgbe_main.c:878: }
drivers/mmc/host/sdhci.c:698: }
drivers/vme/bridges/vme_fake.c:415: }
drivers/staging/rtl8723bs/hal/HalHWImg8723B_MAC.c:298: }
drivers/staging/rtl8723bs/hal/hal_com_phycfg.c:1870: }
drivers/staging/rtl8723bs/hal/HalHWImg8723B_RF.c:332: }
drivers/staging/rtl8723bs/hal/HalHWImg8723B_BB.c:330: }
drivers/staging/rtl8723bs/hal/HalHWImg8723B_BB.c:593: }
drivers/staging/rtlwifi/rc.c:246: }
drivers/staging/rtl8188eu/core/rtw_mlme_ext.c:4800: }
drivers/staging/rtl8188eu/core/rtw_mlme.c:2110: }
drivers/staging/rtl8192u/r8192U_core.c:4143: }
drivers/staging/rtl8192u/r8192U_dm.c:2691: }
drivers/staging/vc04_services/interface/vchiq_arm/vchiq_core.c:2813: }
drivers/staging/rtl8192e/rtl8192e/rtl_dm.c:2100: }
drivers/staging/rtl8192e/rtl8192e/r8192E_dev.c:1854: }
drivers/scsi/qla2xxx/qla_nx2.c:753: }
drivers/usb/gadget/udc/r8a66597-udc.c:1153: }
drivers/usb/gadget/udc/m66592-udc.c:956: }
drivers/usb/gadget/udc/fsl_qe_udc.c:2205: }
drivers/infiniband/hw/usnic/usnic_ib_main.c:141: }
drivers/gpu/drm/radeon/ci_dpm.c:1372: }
drivers/gpu/drm/radeon/ci_dpm.c:3736: }
drivers/gpu/drm/amd/amdgpu/amdgpu_encoders.c:53: }
drivers/gpu/drm/amd/amdgpu/ci_dpm.c:1524: }
drivers/gpu/drm/amd/amdgpu/ci_dpm.c:3881: }
drivers/gpu/drm/amd/display/dc/dcn10/dcn10_mpc.c:406: }
drivers/tty/mxser.c:853: }
drivers/video/fbdev/cg3.c:276: }
drivers/video/fbdev/pm3fb.c:167: }
drivers/video/fbdev/nvidia/nv_hw.c:805: }
drivers/video/fbdev/nvidia/nv_hw.c:841: }
drivers/video/fbdev/amifb.c:2727: }
drivers/video/fbdev/amifb.c:2873: }
drivers/video/fbdev/amifb.c:3009: }
drivers/video/fbdev/smscufx.c:609: }
drivers/video/fbdev/pm2fb.c:271: }
drivers/video/fbdev/pm2fb.c:291: }
drivers/isdn/hardware/eicon/message.c:895: }
drivers/isdn/hardware/eicon/message.c:11246: }
drivers/isdn/hardware/eicon/debug.c:1900: }
drivers/power/supply/ab8500_charger.c:2265: }
fs/reiserfs/stree.c:808: }
lib/bch.c:1104: }
net/sched/sch_cbq.c:946: }
net/sched/cls_rsvp.h:694: }
net/sched/cls_route.c:598: }
sound/soc/rockchip/rockchip_i2s.c:133: }
sound/soc/rockchip/rockchip_i2s.c:175: }
sound/isa/sb/sb16_main.c:95: }
sound/isa/sb/sb16_main.c:128: }
A trivial hand-produced example selected randomly:
---
.../broadcom/brcm80211/brcmsmac/phy/phy_n.c | 455 +++++++++------------
1 file changed, 201 insertions(+), 254 deletions(-)
diff --git a/drivers/net/wireless/broadcom/brcm80211/brcmsmac/phy/phy_n.c b/drivers/net/wireless/broadcom/brcm80211/brcmsmac/phy/phy_n.c
index 7e01981bc5c8..656c7e961314 100644
--- a/drivers/net/wireless/broadcom/brcm80211/brcmsmac/phy/phy_n.c
+++ b/drivers/net/wireless/broadcom/brcm80211/brcmsmac/phy/phy_n.c
@@ -14825,264 +14825,211 @@ wlc_phy_rfctrl_override_nphy_rev7(struct brcms_phy *pi, u16 field, u16 value,
u16 addr = 0, en_addr = 0, val_addr = 0, en_mask = 0, val_mask = 0;
u8 val_shift = 0;
- if (NREV_GE(pi->pubpi.phy_rev, 7)) {
- en_mask = field;
- for (core_num = 0; core_num < 2; core_num++) {
- if (override_id == NPHY_REV7_RFCTRLOVERRIDE_ID0) {
-
- switch (field) {
- case (0x1 << 2):
- en_addr = (core_num == 0) ? 0xe7 : 0xec;
- val_addr = (core_num == 0) ? 0x7a :
- 0x7d;
- val_mask = (0x1 << 1);
- val_shift = 1;
- break;
- case (0x1 << 3):
- en_addr = (core_num == 0) ? 0xe7 : 0xec;
- val_addr = (core_num == 0) ? 0x7a :
- 0x7d;
- val_mask = (0x1 << 2);
- val_shift = 2;
- break;
- case (0x1 << 4):
- en_addr = (core_num == 0) ? 0xe7 : 0xec;
- val_addr = (core_num == 0) ? 0x7a :
- 0x7d;
- val_mask = (0x1 << 4);
- val_shift = 4;
- break;
- case (0x1 << 5):
- en_addr = (core_num == 0) ? 0xe7 : 0xec;
- val_addr = (core_num == 0) ? 0x7a :
- 0x7d;
- val_mask = (0x1 << 5);
- val_shift = 5;
- break;
- case (0x1 << 6):
- en_addr = (core_num == 0) ? 0xe7 : 0xec;
- val_addr = (core_num == 0) ? 0x7a :
- 0x7d;
- val_mask = (0x1 << 6);
- val_shift = 6;
- break;
- case (0x1 << 7):
- en_addr = (core_num == 0) ? 0xe7 : 0xec;
- val_addr = (core_num == 0) ? 0x7a :
- 0x7d;
- val_mask = (0x1 << 7);
- val_shift = 7;
- break;
- case (0x1 << 10):
- en_addr = (core_num == 0) ? 0xe7 : 0xec;
- val_addr = (core_num == 0) ? 0xf8 :
- 0xfa;
- val_mask = (0x7 << 4);
- val_shift = 4;
- break;
- case (0x1 << 11):
- en_addr = (core_num == 0) ? 0xe7 : 0xec;
- val_addr = (core_num == 0) ? 0x7b :
- 0x7e;
- val_mask = (0xffff << 0);
- val_shift = 0;
- break;
- case (0x1 << 12):
- en_addr = (core_num == 0) ? 0xe7 : 0xec;
- val_addr = (core_num == 0) ? 0x7c :
- 0x7f;
- val_mask = (0xffff << 0);
- val_shift = 0;
- break;
- case (0x3 << 13):
- en_addr = (core_num == 0) ? 0xe7 : 0xec;
- val_addr = (core_num == 0) ? 0x348 :
- 0x349;
- val_mask = (0xff << 0);
- val_shift = 0;
- break;
- case (0x1 << 13):
- en_addr = (core_num == 0) ? 0xe7 : 0xec;
- val_addr = (core_num == 0) ? 0x348 :
- 0x349;
- val_mask = (0xf << 0);
- val_shift = 0;
- break;
- default:
- addr = 0xffff;
- break;
- }
- } else if (override_id ==
- NPHY_REV7_RFCTRLOVERRIDE_ID1) {
-
- switch (field) {
- case (0x1 << 1):
- en_addr = (core_num == 0) ? 0x342 :
- 0x343;
- val_addr = (core_num == 0) ? 0x340 :
- 0x341;
- val_mask = (0x1 << 1);
- val_shift = 1;
- break;
- case (0x1 << 3):
- en_addr = (core_num == 0) ? 0x342 :
- 0x343;
- val_addr = (core_num == 0) ? 0x340 :
- 0x341;
- val_mask = (0x1 << 3);
- val_shift = 3;
- break;
- case (0x1 << 5):
- en_addr = (core_num == 0) ? 0x342 :
- 0x343;
- val_addr = (core_num == 0) ? 0x340 :
- 0x341;
- val_mask = (0x1 << 5);
- val_shift = 5;
- break;
- case (0x1 << 4):
- en_addr = (core_num == 0) ? 0x342 :
- 0x343;
- val_addr = (core_num == 0) ? 0x340 :
- 0x341;
- val_mask = (0x1 << 4);
- val_shift = 4;
- break;
- case (0x1 << 2):
-
- en_addr = (core_num == 0) ? 0x342 :
- 0x343;
- val_addr = (core_num == 0) ? 0x340 :
- 0x341;
- val_mask = (0x1 << 2);
- val_shift = 2;
- break;
- case (0x1 << 7):
-
- en_addr = (core_num == 0) ? 0x342 :
- 0x343;
- val_addr = (core_num == 0) ? 0x340 :
- 0x341;
- val_mask = (0x7 << 8);
- val_shift = 8;
- break;
- case (0x1 << 11):
- en_addr = (core_num == 0) ? 0x342 :
- 0x343;
- val_addr = (core_num == 0) ? 0x340 :
- 0x341;
- val_mask = (0x1 << 14);
- val_shift = 14;
- break;
- case (0x1 << 10):
- en_addr = (core_num == 0) ? 0x342 :
- 0x343;
- val_addr = (core_num == 0) ? 0x340 :
- 0x341;
- val_mask = (0x1 << 13);
- val_shift = 13;
- break;
- case (0x1 << 9):
- en_addr = (core_num == 0) ? 0x342 :
- 0x343;
- val_addr = (core_num == 0) ? 0x340 :
- 0x341;
- val_mask = (0x1 << 12);
- val_shift = 12;
- break;
- case (0x1 << 8):
- en_addr = (core_num == 0) ? 0x342 :
- 0x343;
- val_addr = (core_num == 0) ? 0x340 :
- 0x341;
- val_mask = (0x1 << 11);
- val_shift = 11;
- break;
- case (0x1 << 6):
- en_addr = (core_num == 0) ? 0x342 :
- 0x343;
- val_addr = (core_num == 0) ? 0x340 :
- 0x341;
- val_mask = (0x1 << 6);
- val_shift = 6;
- break;
- case (0x1 << 0):
- en_addr = (core_num == 0) ? 0x342 :
- 0x343;
- val_addr = (core_num == 0) ? 0x340 :
- 0x341;
- val_mask = (0x1 << 0);
- val_shift = 0;
- break;
- default:
- addr = 0xffff;
- break;
- }
- } else if (override_id ==
- NPHY_REV7_RFCTRLOVERRIDE_ID2) {
-
- switch (field) {
- case (0x1 << 3):
- en_addr = (core_num == 0) ? 0x346 :
- 0x347;
- val_addr = (core_num == 0) ? 0x344 :
- 0x345;
- val_mask = (0x1 << 3);
- val_shift = 3;
- break;
- case (0x1 << 1):
- en_addr = (core_num == 0) ? 0x346 :
- 0x347;
- val_addr = (core_num == 0) ? 0x344 :
- 0x345;
- val_mask = (0x1 << 1);
- val_shift = 1;
- break;
- case (0x1 << 0):
- en_addr = (core_num == 0) ? 0x346 :
- 0x347;
- val_addr = (core_num == 0) ? 0x344 :
- 0x345;
- val_mask = (0x1 << 0);
- val_shift = 0;
- break;
- case (0x1 << 2):
- en_addr = (core_num == 0) ? 0x346 :
- 0x347;
- val_addr = (core_num == 0) ? 0x344 :
- 0x345;
- val_mask = (0x1 << 2);
- val_shift = 2;
- break;
- case (0x1 << 4):
- en_addr = (core_num == 0) ? 0x346 :
- 0x347;
- val_addr = (core_num == 0) ? 0x344 :
- 0x345;
- val_mask = (0x1 << 4);
- val_shift = 4;
- break;
- default:
- addr = 0xffff;
- break;
- }
+ if (!NREV_GE(pi->pubpi.phy_rev, 7))
+ return;
+
+ en_mask = field;
+ for (core_num = 0; core_num < 2; core_num++) {
+ if (override_id == NPHY_REV7_RFCTRLOVERRIDE_ID0) {
+ switch (field) {
+ case (0x1 << 2):
+ en_addr = (core_num == 0) ? 0xe7 : 0xec;
+ val_addr = (core_num == 0) ? 0x7a : 0x7d;
+ val_mask = (0x1 << 1);
+ val_shift = 1;
+ break;
+ case (0x1 << 3):
+ en_addr = (core_num == 0) ? 0xe7 : 0xec;
+ val_addr = (core_num == 0) ? 0x7a : 0x7d;
+ val_mask = (0x1 << 2);
+ val_shift = 2;
+ break;
+ case (0x1 << 4):
+ en_addr = (core_num == 0) ? 0xe7 : 0xec;
+ val_addr = (core_num == 0) ? 0x7a : 0x7d;
+ val_mask = (0x1 << 4);
+ val_shift = 4;
+ break;
+ case (0x1 << 5):
+ en_addr = (core_num == 0) ? 0xe7 : 0xec;
+ val_addr = (core_num == 0) ? 0x7a : 0x7d;
+ val_mask = (0x1 << 5);
+ val_shift = 5;
+ break;
+ case (0x1 << 6):
+ en_addr = (core_num == 0) ? 0xe7 : 0xec;
+ val_addr = (core_num == 0) ? 0x7a : 0x7d;
+ val_mask = (0x1 << 6);
+ val_shift = 6;
+ break;
+ case (0x1 << 7):
+ en_addr = (core_num == 0) ? 0xe7 : 0xec;
+ val_addr = (core_num == 0) ? 0x7a : 0x7d;
+ val_mask = (0x1 << 7);
+ val_shift = 7;
+ break;
+ case (0x1 << 10):
+ en_addr = (core_num == 0) ? 0xe7 : 0xec;
+ val_addr = (core_num == 0) ? 0xf8 : 0xfa;
+ val_mask = (0x7 << 4);
+ val_shift = 4;
+ break;
+ case (0x1 << 11):
+ en_addr = (core_num == 0) ? 0xe7 : 0xec;
+ val_addr = (core_num == 0) ? 0x7b : 0x7e;
+ val_mask = (0xffff << 0);
+ val_shift = 0;
+ break;
+ case (0x1 << 12):
+ en_addr = (core_num == 0) ? 0xe7 : 0xec;
+ val_addr = (core_num == 0) ? 0x7c : 0x7f;
+ val_mask = (0xffff << 0);
+ val_shift = 0;
+ break;
+ case (0x3 << 13):
+ en_addr = (core_num == 0) ? 0xe7 : 0xec;
+ val_addr = (core_num == 0) ? 0x348 : 0x349;
+ val_mask = (0xff << 0);
+ val_shift = 0;
+ break;
+ case (0x1 << 13):
+ en_addr = (core_num == 0) ? 0xe7 : 0xec;
+ val_addr = (core_num == 0) ? 0x348 : 0x349;
+ val_mask = (0xf << 0);
+ val_shift = 0;
+ break;
+ default:
+ addr = 0xffff;
+ break;
}
+ } else if (override_id == NPHY_REV7_RFCTRLOVERRIDE_ID1) {
- if (off) {
- and_phy_reg(pi, en_addr, ~en_mask);
- and_phy_reg(pi, val_addr, ~val_mask);
- } else {
+ switch (field) {
+ case (0x1 << 1):
+ en_addr = (core_num == 0) ? 0x342 : 0x343;
+ val_addr = (core_num == 0) ? 0x340 : 0x341;
+ val_mask = (0x1 << 1);
+ val_shift = 1;
+ break;
+ case (0x1 << 3):
+ en_addr = (core_num == 0) ? 0x342 : 0x343;
+ val_addr = (core_num == 0) ? 0x340 : 0x341;
+ val_mask = (0x1 << 3);
+ val_shift = 3;
+ break;
+ case (0x1 << 5):
+ en_addr = (core_num == 0) ? 0x342 : 0x343;
+ val_addr = (core_num == 0) ? 0x340 : 0x341;
+ val_mask = (0x1 << 5);
+ val_shift = 5;
+ break;
+ case (0x1 << 4):
+ en_addr = (core_num == 0) ? 0x342 : 0x343;
+ val_addr = (core_num == 0) ? 0x340 : 0x341;
+ val_mask = (0x1 << 4);
+ val_shift = 4;
+ break;
+ case (0x1 << 2):
+ en_addr = (core_num == 0) ? 0x342 : 0x343;
+ val_addr = (core_num == 0) ? 0x340 : 0x341;
+ val_mask = (0x1 << 2);
+ val_shift = 2;
+ break;
+ case (0x1 << 7):
+ en_addr = (core_num == 0) ? 0x342 : 0x343;
+ val_addr = (core_num == 0) ? 0x340 : 0x341;
+ val_mask = (0x7 << 8);
+ val_shift = 8;
+ break;
+ case (0x1 << 11):
+ en_addr = (core_num == 0) ? 0x342 : 0x343;
+ val_addr = (core_num == 0) ? 0x340 : 0x341;
+ val_mask = (0x1 << 14);
+ val_shift = 14;
+ break;
+ case (0x1 << 10):
+ en_addr = (core_num == 0) ? 0x342 : 0x343;
+ val_addr = (core_num == 0) ? 0x340 : 0x341;
+ val_mask = (0x1 << 13);
+ val_shift = 13;
+ break;
+ case (0x1 << 9):
+ en_addr = (core_num == 0) ? 0x342 : 0x343;
+ val_addr = (core_num == 0) ? 0x340 : 0x341;
+ val_mask = (0x1 << 12);
+ val_shift = 12;
+ break;
+ case (0x1 << 8):
+ en_addr = (core_num == 0) ? 0x342 : 0x343;
+ val_addr = (core_num == 0) ? 0x340 : 0x341;
+ val_mask = (0x1 << 11);
+ val_shift = 11;
+ break;
+ case (0x1 << 6):
+ en_addr = (core_num == 0) ? 0x342 : 0x343;
+ val_addr = (core_num == 0) ? 0x340 : 0x341;
+ val_mask = (0x1 << 6);
+ val_shift = 6;
+ break;
+ case (0x1 << 0):
+ en_addr = (core_num == 0) ? 0x342 : 0x343;
+ val_addr = (core_num == 0) ? 0x340 : 0x341;
+ val_mask = (0x1 << 0);
+ val_shift = 0;
+ break;
+ default:
+ addr = 0xffff;
+ break;
+ }
+ } else if (override_id == NPHY_REV7_RFCTRLOVERRIDE_ID2) {
+ switch (field) {
+ case (0x1 << 3):
+ en_addr = (core_num == 0) ? 0x346 : 0x347;
+ val_addr = (core_num == 0) ? 0x344 : 0x345;
+ val_mask = (0x1 << 3);
+ val_shift = 3;
+ break;
+ case (0x1 << 1):
+ en_addr = (core_num == 0) ? 0x346 : 0x347;
+ val_addr = (core_num == 0) ? 0x344 : 0x345;
+ val_mask = (0x1 << 1);
+ val_shift = 1;
+ break;
+ case (0x1 << 0):
+ en_addr = (core_num == 0) ? 0x346 : 0x347;
+ val_addr = (core_num == 0) ? 0x344 : 0x345;
+ val_mask = (0x1 << 0);
+ val_shift = 0;
+ break;
+ case (0x1 << 2):
+ en_addr = (core_num == 0) ? 0x346 : 0x347;
+ val_addr = (core_num == 0) ? 0x344 : 0x345;
+ val_mask = (0x1 << 2);
+ val_shift = 2;
+ break;
+ case (0x1 << 4):
+ en_addr = (core_num == 0) ? 0x346 : 0x347;
+ val_addr = (core_num == 0) ? 0x344 : 0x345;
+ val_mask = (0x1 << 4);
+ val_shift = 4;
+ break;
+ default:
+ addr = 0xffff;
+ break;
+ }
+ }
- if ((core_mask == 0)
- || (core_mask & (1 << core_num))) {
- or_phy_reg(pi, en_addr, en_mask);
+ if (off) {
+ and_phy_reg(pi, en_addr, ~en_mask);
+ and_phy_reg(pi, val_addr, ~val_mask);
+ } else {
+ if ((core_mask == 0) ||
+ (core_mask & (1 << core_num))) {
+ or_phy_reg(pi, en_addr, en_mask);
- if (addr != 0xffff)
- mod_phy_reg(pi, val_addr,
- val_mask,
- (value <<
- val_shift));
- }
+ if (addr != 0xffff)
+ mod_phy_reg(pi, val_addr, val_mask,
+ (value << val_shift));
}
}
}
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: coccinelle & linux-kernel: unindent blocks by reversing tests?
[not found] ` <alpine.DEB.2.20.1803181848370.2420@hadrien>
@ 2018-03-18 18:25 ` Joe Perches
0 siblings, 0 replies; 2+ messages in thread
From: Joe Perches @ 2018-03-18 18:25 UTC (permalink / raw)
To: Julia Lawall; +Cc: LKML, kernel-janitors, cocci
On Sun, 2018-03-18 at 18:50 +0100, Julia Lawall wrote:
>
> On Sun, 18 Mar 2018, Joe Perches wrote:
>
> > There are many blocks of code that could be
> > unindented and so neatened by reversing tests.
[]
> > Which often saves many vertical lines by reducing
> > now unnecessary line-wrapping done at 80-columns.
>
> I tried it. One can't easily make the transformation when there is a
> variable declaration in the block. And Coccinelle doesn't move leading
> comments over to the left. Most of the examples I found seemed to have
> only one level of opportunity. I don't know if the churn is worth it in
> that case. On a more complex example, the pretty printer crashes, so I'll
> have to look into that.
[]
> > A trivial hand-produced example selected randomly:
[]
> > ---
> > .../broadcom/brcm80211/brcmsmac/phy/phy_n.c | 455 +++++++++------------
> > 1 file changed, 201 insertions(+), 254 deletions(-)
Dunno about the churn, but converting many lines of badly
wrapped simple statements and reducing line count seems
somewhat worthwhile.
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2018-03-18 16:51 coccinelle & linux-kernel: unindent blocks by reversing tests? Joe Perches
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2018-03-18 18:25 ` Joe Perches
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