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Commit f2d6d2d8 authored by Nathan Lynch's avatar Nathan Lynch Committed by Paul Mackerras
Browse files

[POWERPC] Add rtas_service_present() helper 



To test for the existence of an RTAS function, we typically do:

   foo_token = rtas_token("foo");
   if (foo_token == RTAS_UNKNOWN_SERVICE)
      return;

Add a rtas_service_present method, which provides a more conventional
boolean interface for testing the existence of an RTAS method.

Signed-off-by: default avatarNathan Lynch <ntl@pobox.com>
Signed-off-by: default avatarPaul Mackerras <paulus@samba.org>
parent 9d9d868e

arch/powerpc/kernel/rtas.c

+6 −0
Original line number Diff line number Diff line
@@ -303,6 +303,12 @@ int rtas_token(const char *service) 
}

EXPORT_SYMBOL(rtas_token);



int rtas_service_present(const char *service)

{

	return rtas_token(service) != RTAS_UNKNOWN_SERVICE;

}

EXPORT_SYMBOL(rtas_service_present);



#ifdef CONFIG_RTAS_ERROR_LOGGING

/*

 * Return the firmware-specified size of the error log buffer

include/asm-powerpc/rtas.h

+1 −0
Original line number Diff line number Diff line
@@ -159,6 +159,7 @@ extern struct rtas_t rtas; 


extern void enter_rtas(unsigned long);

extern int rtas_token(const char *service);

extern int rtas_service_present(const char *service);

extern int rtas_call(int token, int, int, int *, ...);

extern void rtas_restart(char *cmd);

extern void rtas_power_off(void);