Commit b60bbfca authored Jun 25, 2023 by Zheng Zengkai

x86/fpu: KABI_BROKEN_REMOVE "union fpregs_state state" from struct fpu

hulk inclusion
category: bugfix
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I5RQLJ



--------------------------------

5a2451f1 ("x86/fpu: Avoid kabi change caused by struct fpu") will
lead to performance degradation of libmicro pthread_create testcase.
Assuming that no 3rd party driver will reach into struct fpu,
replace kabi fix macro from KABI_DEPRECATE to KABI_BROKEN_REMOVE
for element "union fpregs_state state" of struct fpu.

Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>

parent aacf4228

arch/x86/include/asm/fpu/types.h

+4 −1

Original line number	Diff line number	Diff line
		@@ -494,8 +494,11 @@ struct fpu {
		* context switch and when the kernel uses the FPU. The registers
		* are restored from this storage on return to user space if they
		* are not longer containing the tasks FPU register state.
		*
		* For kabi fix:
		* Assuming that no 3rd party driver will reach into struct fpu
		*/
		KABI_DEPRECATE(union fpregs_state, state)
		KABI_BROKEN_REMOVE(union fpregs_state state)
		KABI_EXTEND(struct fpstate __fpstate)
		/*
		* WARNING: '__fpstate' is dynamically-sized. Do not put