From f2d6d2d8bb4e9bb4aef225c149e42cac3ac3d4d0 Mon Sep 17 00:00:00 2001 From: Nathan Lynch Date: Wed, 6 Dec 2006 18:50:45 -0600 Subject: [PATCH] [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: Nathan Lynch Signed-off-by: Paul Mackerras --- arch/powerpc/kernel/rtas.c | 6 ++++++ include/asm-powerpc/rtas.h | 1 + 2 files changed, 7 insertions(+) diff --git a/arch/powerpc/kernel/rtas.c b/arch/powerpc/kernel/rtas.c index 952f4c2fc1eb..76b5d7ebdcc6 100644 --- a/arch/powerpc/kernel/rtas.c +++ b/arch/powerpc/kernel/rtas.c @@ -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 diff --git a/include/asm-powerpc/rtas.h b/include/asm-powerpc/rtas.h index 031ef57fb195..8eaa7b28d9d0 100644 --- a/include/asm-powerpc/rtas.h +++ b/include/asm-powerpc/rtas.h @@ -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);