Commit c2e5d70c authored by Michael Ellerman's avatar Michael Ellerman
Browse files

powerpc/83xx: Fix build failure with FPU=n 



Building eg. 83xx/mpc832x_rdb_defconfig with FPU=n, fails with:

  arch/powerpc/platforms/83xx/suspend.c: In function 'mpc83xx_suspend_enter':
  arch/powerpc/platforms/83xx/suspend.c:209:17: error: implicit declaration of function 'enable_kernel_fp'
    209 |                 enable_kernel_fp();

Fix it by providing an enable_kernel_fp() stub for FPU=n builds,
which allows using IS_ENABLED(CONFIG_PPC_FPU) around the call to
enable_kernel_fp().

Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20240306125853.3714578-2-mpe@ellerman.id.au
parent 329105ce

arch/powerpc/include/asm/switch_to.h

+4 −0
Original line number Diff line number Diff line
@@ -48,6 +48,10 @@ static inline void disable_kernel_fp(void) 
#else

static inline void save_fpu(struct task_struct *t) { }

static inline void flush_fp_to_thread(struct task_struct *t) { }

static inline void enable_kernel_fp(void)

{

	BUILD_BUG();

}

#endif



#ifdef CONFIG_ALTIVEC

arch/powerpc/platforms/83xx/suspend.c

+2 −1
Original line number Diff line number Diff line
@@ -206,6 +206,7 @@ static int mpc83xx_suspend_enter(suspend_state_t state) 
		out_be32(&pmc_regs->config1,

		         in_be32(&pmc_regs->config1) | PMCCR1_POWER_OFF);



		if (IS_ENABLED(CONFIG_PPC_FPU))

			enable_kernel_fp();



		mpc83xx_enter_deep_sleep(immrbase);