Real-time linux kernel

[Artyom]

@umiddelb
Can you tell me, What is the difference between BSP kernel and mainline kernel? What i must do with mainline kernel to get BSP kernel?

The BSP (= Board Support Package) kernel contains patches provided by Allwinner to make the stock Linux kernel run on their SoC. Some of theses patches may interfere with the RT patches.

You can download the mainline 3.10.65 kernel here and run diffs against the BSP kernel for the files indicated above.
Then you need to identify the sections affected by the RT patch in the BSP kernel or run the patch against the mainline sources and compare the files mentioned above before and after applying the RT patch with their BSP kernel counterpart.

Part in BSP kernel which swears RT patch:

patching file arch/arm/mm/fault.c
Hunk #1 FAILED at 277.
1 out of 1 hunk FAILED -- saving rejects to file arch/arm/mm/fault.c.rej

patching file drivers/misc/Makefile
Hunk #1 FAILED at 53.
1 out of 1 hunk FAILED -- saving rejects to file drivers/misc/Makefile.rej

patching file kernel/fork.c
Hunk #2 FAILED at 230.
1 out of 9 hunks FAILED -- saving rejects to file kernel/fork.c.rej

patching file kernel/hrtimer.c
Hunk #1 FAILED at 47.
1 out of 31 hunks FAILED -- saving rejects to file kernel/hrtimer.c.rej

patching file kernel/sched/core.c
Hunk #29 FAILED at 4038.
Hunk #45 FAILED at 7450.
2 out of 46 hunks FAILED -- saving rejects to file kernel/sched/core.c.rej

patching file kernel/watchdog.c
Hunk #2 FAILED at 241.
1 out of 3 hunks FAILED -- saving rejects to file kernel/watchdog.c.rej

patching file mm/page_alloc.c
Hunk #18 FAILED at 5540.
1 out of 21 hunks FAILED -- saving rejects to file mm/page_alloc.c.rej