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| author | Paul Burton <paul.burton@mips.com> | 2018-12-17 22:05:40 -0800 |
|---|---|---|
| committer | Paul Burton <paul.burton@mips.com> | 2018-12-17 22:05:40 -0800 |
| commit | 41e486f4f66d3e646fedd60469bc60e73662de50 (patch) | |
| tree | 9bc08f9a8d3fecc0ad3832577ef9e1fa18ce0259 /arch/mips/kernel | |
| parent | 99bf73ebf9c4193dbcc5331b29d316a89ada43d1 (diff) | |
| download | linux-41e486f4f66d3e646fedd60469bc60e73662de50.tar.gz linux-41e486f4f66d3e646fedd60469bc60e73662de50.tar.bz2 linux-41e486f4f66d3e646fedd60469bc60e73662de50.zip | |
MIPS: Remove struct mm_context_t fp_mode_switching field
The fp_mode_switching field in struct mm_context_t was left unused by
commit 8c8d953c2800 ("MIPS: Schedule on CPUs we need to lose FPU for a
mode switch") in v4.19, with nothing modifying its value & nothing
waiting on it having any particular value after that commit. Remove the
unused field & the one remaining reference to it.
Signed-off-by: Paul Burton <paul.burton@mips.com>
Diffstat (limited to 'arch/mips/kernel')
| -rw-r--r-- | arch/mips/kernel/process.c | 9 |
1 files changed, 3 insertions, 6 deletions
diff --git a/arch/mips/kernel/process.c b/arch/mips/kernel/process.c index d4f7fd4550e1..6829a064aac8 100644 --- a/arch/mips/kernel/process.c +++ b/arch/mips/kernel/process.c @@ -737,10 +737,9 @@ static long prepare_for_fp_mode_switch(void *unused) /* * This is icky, but we use this to simply ensure that all CPUs have * context switched, regardless of whether they were previously running - * kernel or user code. This ensures that no CPU currently has its FPU - * enabled, or is about to attempt to enable it through any path other - * than enable_restore_fp_context() which will wait appropriately for - * fp_mode_switching to be zero. + * kernel or user code. This ensures that no CPU that a mode-switching + * program may execute on keeps its FPU enabled (& in the old mode) + * throughout the mode switch. */ return 0; } @@ -829,8 +828,6 @@ int mips_set_process_fp_mode(struct task_struct *task, unsigned int value) work_on_cpu(cpu, prepare_for_fp_mode_switch, NULL); put_online_cpus(); - wake_up_var(&task->mm->context.fp_mode_switching); - return 0; } |