Hi, Just letting you know, the following warning from __clk_get is now printed, and not printed after revert (git revert 0b35b92fb3600a2f9ca114a6142db95f760d55f5). Is the driver doing something it shouldn't be doing? moxart_of_pll_clk_init() source can be found here: http://www.spinics.net/lists/arm-kernel/msg278572.html boot log: Uncompressing Linux... done, booting the kernel. [ 0.000000] Booting Linux on physical CPU 0x0 [ 0.000000] Linux version 3.12.0-rc7-next-20131031+ (i@Ildjarn) (gcc version 4.6.3 (crosstool-NG 1.16.0) ) #1043 PREEMPT Fri Nov 1 09:34:07 CET 2013 [ 0.000000] CPU: FA526 [66015261] revision 1 (ARMv4), cr=0000397f [ 0.000000] CPU: VIVT data cache, VIVT instruction cache [ 0.000000] Machine model: MOXA UC-7112-LX [ 0.000000] Memory policy: ECC disabled, Data cache writeback [ 0.000000] On node 0 totalpages: 8192 [ 0.000000] free_area_init_node: node 0, pgdat c03802ac, node_mem_map c0941000 [ 0.000000] Normal zone: 72 pages used for memmap [ 0.000000] Normal zone: 0 pages reserved [ 0.000000] Normal zone: 8192 pages, LIFO batch:0 [ 0.000000] pcpu-alloc: s0 r0 d32768 u32768 alloc=1*32768 [ 0.000000] pcpu-alloc: [0] 0 [ 0.000000] Built 1 zonelists in Zone order, mobility grouping on. Total pages: 8120 [ 0.000000] Kernel command line: debug loglevel=9 console=ttyS0,115200n8 root=/dev/mmcblk0p1 rw rootwait [ 0.000000] PID hash table entries: 128 (order: -3, 512 bytes) [ 0.000000] Dentry cache hash table entries: 4096 (order: 2, 16384 bytes) [ 0.000000] Inode-cache hash table entries: 2048 (order: 1, 8192 bytes) [ 0.000000] Memory: 22920K/32768K available (2725K kernel code, 106K rwdata, 560K rodata, 156K init, 5880K bss, 9848K reserved) [ 0.000000] Virtual kernel memory layout: [ 0.000000] vector : 0xffff0000 - 0xffff1000 ( 4 kB) [ 0.000000] fixmap : 0xfff00000 - 0xfffe0000 ( 896 kB) [ 0.000000] vmalloc : 0xc2800000 - 0xff000000 ( 968 MB) [ 0.000000] lowmem : 0xc0000000 - 0xc2000000 ( 32 MB) [ 0.000000] .text : 0xc0008000 - 0xc033d84c (3287 kB) [ 0.000000] .init : 0xc033e000 - 0xc0365394 ( 157 kB) [ 0.000000] .data : 0xc0366000 - 0xc0380ae0 ( 107 kB) [ 0.000000] .bss : 0xc0380aec - 0xc093ebbc (5881 kB) [ 0.000000] SLUB: HWalign=32, Order=0-3, MinObjects=0, CPUs=1, Nodes=1 [ 0.000000] Preemptible hierarchical RCU implementation. [ 0.000000] NR_IRQS:16 nr_irqs:16 16 [ 0.000000] ------------[ cut here ]------------ [ 0.000000] WARNING: CPU: 0 PID: 0 at include/linux/kref.h:47 __clk_get+0x54/0x68() [ 0.000000] CPU: 0 PID: 0 Comm: swapper Not tainted 3.12.0-rc7-next-20131031+ #1043 [ 0.000000] [<c000d214>] (unwind_backtrace+0x0/0xf4) from [<c000b964>] (show_stack+0x18/0x1c) [ 0.000000] [<c000b964>] (show_stack+0x18/0x1c) from [<c02715e0>] (dump_stack+0x20/0x28) [ 0.000000] [<c02715e0>] (dump_stack+0x20/0x28) from [<c0013ab0>] (warn_slowpath_common+0x64/0x84) [ 0.000000] [<c0013ab0>] (warn_slowpath_common+0x64/0x84) from [<c0013ba4>] (warn_slowpath_null+0x24/0x2c) [ 0.000000] [<c0013ba4>] (warn_slowpath_null+0x24/0x2c) from [<c01e5c00>] (__clk_get+0x54/0x68) [ 0.000000] [<c01e5c00>] (__clk_get+0x54/0x68) from [<c01e334c>] (of_clk_get+0x64/0x7c) [ 0.000000] [<c01e334c>] (of_clk_get+0x64/0x7c) from [<c03508f0>] (moxart_of_pll_clk_init+0xd8/0x15c) [ 0.000000] [<c03508f0>] (moxart_of_pll_clk_init+0xd8/0x15c) from [<c0350588>] (of_clk_init+0x48/0x70) [ 0.000000] [<c0350588>] (of_clk_init+0x48/0x70) from [<c03425f0>] (moxart_init_time+0x14/0x1c) [ 0.000000] [<c03425f0>] (moxart_init_time+0x14/0x1c) from [<c034005c>] (time_init+0x28/0x3c) [ 0.000000] [<c034005c>] (time_init+0x28/0x3c) from [<c033e954>] (start_kernel+0x1d0/0x2dc) [ 0.000000] [<c033e954>] (start_kernel+0x1d0/0x2dc) from [<00008040>] (0x8040) [ 0.000000] ---[ end trace 3406ff24bd97382e ]--- [ 0.000000] sched_clock: 32 bits at 100 Hz, resolution 10000000ns, wraps every 21474836480000000ns [ 0.000000] Lock dependency validator: Copyright (c) 2006 Red Hat, Inc., Ingo Molnar [ 0.000000] ... MAX_LOCKDEP_SUBCLASSES: 8 [ 0.000000] ... MAX_LOCK_DEPTH: 48 [ 0.000000] ... MAX_LOCKDEP_KEYS: 8191 [ 0.000000] ... CLASSHASH_SIZE: 4096 [ 0.000000] ... MAX_LOCKDEP_ENTRIES: 16384 [ 0.000000] ... MAX_LOCKDEP_CHAINS: 32768 [ 0.000000] ... CHAINHASH_SIZE: 16384 [ 0.000000] memory used by lock dependency info: 3695 kB [ 0.000000] per task-struct memory footprint: 1152 bytes [ 0.000000] kmemleak: Kernel memory leak detector disabled [ 0.000000] ODEBUG: 0 of 0 active objects replaced [ 0.000000] kmemleak: Early log buffer exceeded (672), please increase DEBUG_KMEMLEAK_EARLY_LOG_SIZE Regards, Jonas
