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366dd4ea9d
Fix the FTRACE function tracer for 32- and 64-bit kernel. The former code was horribly broken. Reimplement most coding in assembly and utilize optimizations, e.g. put mcount() and ftrace_stub() into one L1 cacheline. Signed-off-by: Helge Deller <deller@gmx.de>
20 lines
573 B
Plaintext
20 lines
573 B
Plaintext
menu "Kernel hacking"
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source "lib/Kconfig.debug"
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config TRACE_IRQFLAGS_SUPPORT
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def_bool y
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config DEBUG_RODATA
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bool "Write protect kernel read-only data structures"
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depends on DEBUG_KERNEL
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default y
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help
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Mark the kernel read-only data as write-protected in the pagetables,
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in order to catch accidental (and incorrect) writes to such const
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data. This option may have a slight performance impact because a
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portion of the kernel code won't be covered by a TLB anymore.
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If in doubt, say "N".
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endmenu
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