author: Sebastian Andrzej Siewior <bigeasy@linutronix.de> 2021-07-29 12:52:14 +0200
committer: Minda Chen <minda.chen@starfivetech.com> 2023-11-06 19:24:52 +0800
commit: dcc75fc8b5cf7334fc212c72538827796803c35a
parent: b77bc48a663da7cb5501e60c33914e2bacd939f3
Commit Summary:
Diffstat:
1 file changed, 5 insertions, 1 deletion
diff --git a/arch/arm64/kernel/fpsimd.c b/arch/arm64/kernel/fpsimd.c
index ff4962750b3d..5e5a869b1f3a 100644
--- a/arch/arm64/kernel/fpsimd.c
+++ b/arch/arm64/kernel/fpsimd.c
@@ -1033,6 +1033,7 @@ void fpsimd_thread_switch(struct task_struct *next)
void fpsimd_flush_thread(void)
{
int vl, supported_vl;
+ void *sve_state = NULL;
if (!system_supports_fpsimd())
return;
@@ -1045,7 +1046,10 @@ void fpsimd_flush_thread(void)
if (system_supports_sve()) {
clear_thread_flag(TIF_SVE);
- sve_free(current);
+
+ /* Defer kfree() while in atomic context */
+ sve_state = current->thread.sve_state;
+ current->thread.sve_state = NULL;
/*
* Reset the task vector length as required.
@@ -1079,6 +1083,7 @@ void fpsimd_flush_thread(void)
}
put_cpu_fpsimd_context();
+ kfree(sve_state);
}
/*