Changeset ba9a150 in mainline for kernel/generic/src/proc/scheduler.c

Timestamp:

2018-11-09T22:03:24Z (7 years ago)

Author:

Jiří Zárevúcky <zarevucky.jiri@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

abf6c01

Parents:

4f3aa76

git-author:

Jiří Zárevúcky <zarevucky.jiri@…> (2018-11-08 17:08:07)

git-committer:

Jiří Zárevúcky <zarevucky.jiri@…> (2018-11-09 22:03:24)

Message:

Always allocate FPU context ahead of time, even when switching is lazy

File:

• kernel/generic/src/proc/scheduler.c (modified) (2 diffs)

kernel/generic/src/proc/scheduler.c

@@ -134 +134 @@
 void scheduler_fpu_lazy_request(void)
 {
-restart:
         fpu_enable();
         irq_spinlock_lock(&CPU->lock, false);
@@ -153 +152 @@
                 fpu_context_restore(THREAD->saved_fpu_context);
         } else {
-                /* Allocate FPU context */
-                if (!THREAD->saved_fpu_context) {
-                        /* Might sleep */
-                        irq_spinlock_unlock(&THREAD->lock, false);
-                        irq_spinlock_unlock(&CPU->lock, false);
-                        THREAD->saved_fpu_context =
-                            (fpu_context_t *) slab_alloc(fpu_context_cache, 0);
-
-                        /* We may have switched CPUs during slab_alloc */
-                        goto restart;
-                }
                 fpu_init();
                 THREAD->fpu_context_exists = true;