diff options
Diffstat (limited to 'debian/patches-rt/0018-x86-fpu-Prepare-copy_fpstate_to_sigframe-for-TIF_NEE.patch')
| -rw-r--r-- | debian/patches-rt/0018-x86-fpu-Prepare-copy_fpstate_to_sigframe-for-TIF_NEE.patch | 36 |
1 files changed, 0 insertions, 36 deletions
diff --git a/debian/patches-rt/0018-x86-fpu-Prepare-copy_fpstate_to_sigframe-for-TIF_NEE.patch b/debian/patches-rt/0018-x86-fpu-Prepare-copy_fpstate_to_sigframe-for-TIF_NEE.patch deleted file mode 100644 index 775aed89a..000000000 --- a/debian/patches-rt/0018-x86-fpu-Prepare-copy_fpstate_to_sigframe-for-TIF_NEE.patch +++ /dev/null @@ -1,36 +0,0 @@ -From: Rik van Riel <riel@surriel.com> -Date: Sun, 9 Sep 2018 18:30:51 +0200 -Subject: [PATCH 18/27] x86/fpu: Prepare copy_fpstate_to_sigframe() for - TIF_NEED_FPU_LOAD -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/5.0/older/patches-5.0.10-rt7.tar.xz - -The FPU registers need only to be saved if TIF_NEED_FPU_LOAD is not set. -Otherwise this has been already done and can be skipped. - -Signed-off-by: Rik van Riel <riel@surriel.com> -Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> ---- - arch/x86/kernel/fpu/signal.c | 12 +++++++++++- - 1 file changed, 11 insertions(+), 1 deletion(-) - ---- a/arch/x86/kernel/fpu/signal.c -+++ b/arch/x86/kernel/fpu/signal.c -@@ -171,7 +171,17 @@ int copy_fpstate_to_sigframe(void __user - sizeof(struct user_i387_ia32_struct), NULL, - (struct _fpstate_32 __user *) buf) ? -1 : 1; - -- copy_fpregs_to_fpstate(fpu); -+ fpregs_lock(); -+ /* -+ * If we do not need to load the FPU registers at return to userspace -+ * then the CPU has the current state and we need to save it. Otherwise -+ * it is already done and we can skip it. -+ */ -+ if (!test_thread_flag(TIF_NEED_FPU_LOAD)) { -+ copy_fpregs_to_fpstate(fpu); -+ set_thread_flag(TIF_NEED_FPU_LOAD); -+ } -+ fpregs_unlock(); - - if (using_compacted_format()) { - if (copy_xstate_to_user(buf_fx, xsave, 0, size)) |