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

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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: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20240306125853.3714578-2-mpe@ellerman.id.au
This commit is contained in:
Michael Ellerman 2024-03-06 23:58:52 +11:00
parent 329105ce53
commit c2e5d70cf0
2 changed files with 6 additions and 1 deletions
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4
arch/powerpc/include/asm/switch_to.h
View File

@ -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

3
arch/powerpc/platforms/83xx/suspend.c
View File

@ -206,7 +206,8 @@ static int mpc83xx_suspend_enter(suspend_state_t state)
out_be32(&pmc_regs->config1,
in_be32(&pmc_regs->config1) | PMCCR1_POWER_OFF);
enable_kernel_fp();
if (IS_ENABLED(CONFIG_PPC_FPU))
enable_kernel_fp();
mpc83xx_enter_deep_sleep(immrbase);