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| author | Heiko Carstens <hca@linux.ibm.com> | 2024-02-03 13:45:09 +0300 |
|---|---|---|
| committer | Heiko Carstens <hca@linux.ibm.com> | 2024-02-16 16:30:15 +0300 |
| commit | 419abc4d3828813b58d047da146f519eedaa395b (patch) | |
| tree | b358423efb377ffd2c050aab1ab2e41740ba44ab /arch/s390/include/asm/fpu.h | |
| parent | 918c7cad66509c2170e38a088550fb4a525e0878 (diff) | |
| download | linux-419abc4d3828813b58d047da146f519eedaa395b.tar.xz | |
s390/fpu: convert FPU CIF flag to regular TIF flag
The FPU state, as represented by the CIF_FPU flag reflects the FPU state of
a task, not the CPU it is running on. Therefore convert the flag to a
regular TIF flag.
This removes the magic in switch_to() where a save_fpu_regs() call for the
currently (previous) running task sets the per-cpu CIF_FPU flag, which is
required to restore FPU register contents of the next task, when it returns
to user space.
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Diffstat (limited to 'arch/s390/include/asm/fpu.h')
| -rw-r--r-- | arch/s390/include/asm/fpu.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/s390/include/asm/fpu.h b/arch/s390/include/asm/fpu.h index be85c28cdcde..3f076172a283 100644 --- a/arch/s390/include/asm/fpu.h +++ b/arch/s390/include/asm/fpu.h @@ -148,7 +148,7 @@ static inline void kernel_fpu_begin(struct kernel_fpu *state, u32 flags) { preempt_disable(); state->mask = S390_lowcore.fpu_flags; - if (!test_cpu_flag(CIF_FPU)) { + if (!test_thread_flag(TIF_FPU)) { /* Save user space FPU state and register contents */ save_fpu_regs(); } else if (state->mask & flags) { |