2016-05-10 15:58 GMT+02:00 Richard Genoud <richard.gen...@gmail.com>: > Hi, > > Starting with 4.6-rc1, a sleep 1 doesn't return : > > execve("/bin/sleep", ["sleep", "1"], ["USER=root", "SHLVL=1", > "OLDPWD=/var", "HOME=/", "TERM=vt102", > "PATH=/sbin:/usr/sbin:/bin:/usr/bin", "SHELL=/bin/sh", "PWD=/"]) = 0 > uname({sysname="Linux", nodename="LNS", > release="4.5.0-09406-g46e595a17dcf", version="#72 Tue May 10 15:41:34 > CEST 2016", machine="armv5tejl", domainname="(none)"}) = 0 > brk(0) = 0x153000 > brk(0x153d20) = 0x153d20 > set_tls(0x1534c0, 0x14d1e4, 0, 0x153d20, 0x14e368) = 0 > readlink("/proc/self/exe", "/bin/busybox", 4096) = 12 > brk(0x174d20) = 0x174d20 > brk(0x175000) = 0x175000 > getuid32() = 0 > rt_sigprocmask(SIG_BLOCK, [CHLD], [], 8) = 0 > rt_sigaction(SIGCHLD, NULL, {SIG_DFL, [], 0}, 8) = 0 > rt_sigprocmask(SIG_SETMASK, [], NULL, 8) = 0 > nanosleep({1, 0}, > > And the heartbeat led doesn't blink anymore (full on), as if the > timers never fire. > > The platform is an AT91SAM9G35-CM. > > git bisect gives a merge as the 1st bad commit :( > first bad commit: [46e595a17dcf11404f713845ecb5b06b92a94e43] Merge tag > 'armsoc-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
I went a little further in tracking that down, starting from the merge (1st bad commit) and reverting some commits. It seems that the culprit is : commit 863a81c3be1d931bdae6426e231add9334311f13 Author: Boris Brezillon <boris.brezil...@free-electrons.com> Date: Fri Sep 5 09:54:13 2014 +0200 clk: at91: make use of syscon to share PMC registers in several drivers Here are the commits I've reverted : git log --oneline --decorate -20 849cdaa0cf04 (HEAD, tag: good) Revert "clk: at91: make use of syscon to share PMC registers in several drivers" 4bd6dde95321 (tag: last_bad) Revert "clk: at91: make use of syscon/regmap internally" a56dacaa24c4 (tag: always_bad) Revert "clk: at91: remove IRQ handling and use polling" 33edfe7a2de6 Revert "clk: at91: pmc: merge at91_pmc_init in atmel_pmc_probe" 0b22bb649eae Revert "clk: at91: pmc: move pmc structures to C file" 14994fdff366 Revert "ARM: at91: pm: simply call at91_pm_init" 6f0821175327 (tag: still_bad) Revert "ARM: at91: pm: find and remap the pmc" b52bbf7fad1b Revert "ARM: at91: pm: move idle functions to pm.c" dffb1a5f68b9 Revert "ARM: at91: remove useless includes and function prototypes" db352691dcc1 Revert "usb: gadget: atmel: access the PMC using regmap" f7b5433dbbc8 Revert "clk: at91: pmc: drop at91_pmc_base" 6e6dfc0d91c0 Revert "clk: at91: pmc: remove useless capacities handling" ceddd3f88ada Revert "clk: at91: remove useless includes" 46e595a17dcf (tag: bad) Merge tag 'armsoc-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc e3b1f64e04f5 Merge tag 'armsoc-defconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc 915c56bc01d6 Merge tag 'armsoc-dt64' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc 5a6b7e53d035 Merge tag 'armsoc-dt' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc 8c6d4082fc6a Merge tag 'armsoc-arm64' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc 33b3d2e88c9e Merge tag 'armsoc-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc e88fa1b8b00a Merge tag 'armsoc-cleanup' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc