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powerpc64/ftrace: Add helpers to hard disable ftrace

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Add some helpers to enable/disable ftrace through paca->ftrace_enabled.

Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Naveen N. Rao 2018-04-19 12:34:02 +05:30 committed by Michael Ellerman
parent c3e59d7784
commit acd55b1005
1 changed files with 17 additions and 0 deletions
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17
arch/powerpc/include/asm/ftrace.h
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@ -82,6 +82,23 @@ static inline bool arch_syscall_match_sym_name(const char *sym, const char *name
return !strcmp(sym + 4, name + 3);
}
#endif /* CONFIG_FTRACE_SYSCALLS && PPC64_ELF_ABI_v1 */
#ifdef CONFIG_PPC64
#include <asm/paca.h>
static inline void this_cpu_disable_ftrace(void)
{
get_paca()->ftrace_enabled = 0;
}
static inline void this_cpu_enable_ftrace(void)
{
get_paca()->ftrace_enabled = 1;
}
#else /* CONFIG_PPC64 */
static inline void this_cpu_disable_ftrace(void) { }
static inline void this_cpu_enable_ftrace(void) { }
#endif /* CONFIG_PPC64 */
#endif /* !__ASSEMBLY__ */
#endif /* _ASM_POWERPC_FTRACE */