[PATCH] arm64/gcs: Don't call gcs_free() during flush_gcs()

[Mark Brown]

Currently we call gcs_free() during flush_gcs() to reset the thread state
for GCS. This includes unmapping any kernel allocated GCS, but this is
redundant when doing a flush_thread() since we are reinitialisng the thread
memory too. Inline the reinitialisaton of the thread struct.

Signed-off-by: Mark Brown <broonie at kernel.org>
---
 arch/arm64/kernel/process.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/arch/arm64/kernel/process.c b/arch/arm64/kernel/process.c
index a5ca15daeb8a..5954cec19660 100644
--- a/arch/arm64/kernel/process.c
+++ b/arch/arm64/kernel/process.c
@@ -288,7 +288,9 @@ static void flush_gcs(void)
 	if (!system_supports_gcs())
 		return;
 
-	gcs_free(current);
+	current->thread.gcspr_el0 = 0;
+	current->thread.gcs_base = 0;
+	current->thread.gcs_size = 0;
 	current->thread.gcs_el0_mode = 0;
 	write_sysreg_s(GCSCRE0_EL1_nTR, SYS_GCSCRE0_EL1);
 	write_sysreg_s(0, SYS_GCSPR_EL0);

---
base-commit: 19272b37aa4f83ca52bdf9c16d5d81bdd1354494
change-id: 20250609-arm64-gcs-flush-thread-8aeff2a71d5d

Best regards,
-- 
Mark Brown <broonie at kernel.org>