Don't be afraid to include me on Cc's. You'll get a quicker answer. On Mon, 06 Jan 2014 08:03:02 +0000 "Matthias Klein" <matthias.klein@xxxxxxxxxxx> wrote: > Hello, > > I updated from 3.4.69-rt86 to 3.4.75-rt93 on an iMX.537 ARM platform. > > Basically the kernel works but I get the following error messages during > boot: > > > Mount-cache hash table entries: 512 > CPU: Testing write buffer coherency: ok > ftrace: allocating 13405 entries in 40 pages > ------------[ cut here ]------------ > WARNING: at kernel/trace/ftrace.c:1589 ftrace_bug+0x74/0x174() > Modules linked in: > Backtrace: > [<c0011bfc>] (dump_backtrace+0x0/0x10c) from [<c030dde4>] > (dump_stack+0x20/0x24) > r6:c0073060 r5:00000009 r4:00000000 r3:271ae957 > [<c030ddc4>] (dump_stack+0x0/0x24) from [<c001f268>] > (warn_slowpath_common+0x5c/0x74) > [<c001f20c>] (warn_slowpath_common+0x0/0x74) from [<c001f33c>] > (warn_slowpath_null+0x2c/0x34) > r8:000008c9 r7:60000153 r6:df807bc0 r5:c0071268 r4:c048a3a0 > r3:00000009 > [<c001f310>] (warn_slowpath_null+0x0/0x34) from [<c0073060>] > (ftrace_bug+0x74/0x174) > [<c0072fec>] (ftrace_bug+0x0/0x174) from [<c0073600>] > (ftrace_process_locs+0x39c/0x474) > r5:c04d0f40 r4:00000000 > [<c0073264>] (ftrace_process_locs+0x0/0x474) from [<c0426880>] > (ftrace_init+0x98/0x1a4) > [<c04267e8>] (ftrace_init+0x0/0x1a4) from [<c041b7d0>] > (start_kernel+0x294/0x2dc) > r8:70004059 r7:c0911e80 r6:c043aeac r5:ffffffff r4:c0456860 > [<c041b53c>] (start_kernel+0x0/0x2dc) from [<70008040>] (0x70008040) > r7:c0459764 r6:c043aea8 r5:c0456050 r4:10c53c7d > ---[ end trace 0000000000000001 ]--- > ftrace failed to modify [<c0071268>] ftrace_swap_recs+0x2c/0x3c > actual: 07:00:8e:e8 > Setting up static identity map for 0x703136b8 - 0x70313710 > devtmpfs: initialized > > Has someone a tip whats the problem ? Strange, it tried to convert ftrace_swap_recs, but that should not have been even in the table to modify, as ftrace_swap_recs is in ftrace.c, which disables all -pg added in the compile. Try a make clean and build again. Something may have been screwed up in the compile. -- Steve -- To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
