Commit 1894a403 authored by Peter Zijlstra's avatar Peter Zijlstra
Browse files

x86: Always inline on_thread_stack() and current_top_of_stack() 



Becaues GCC clearly lost it's marbles again...

vmlinux.o: warning: objtool: enter_from_user_mode+0x4e: call to on_thread_stack() leaves .noinstr.text section
vmlinux.o: warning: objtool: syscall_enter_from_user_mode+0x53: call to on_thread_stack() leaves .noinstr.text section
vmlinux.o: warning: objtool: syscall_enter_from_user_mode_prepare+0x4e: call to on_thread_stack() leaves .noinstr.text section
vmlinux.o: warning: objtool: irqentry_enter_from_user_mode+0x4e: call to on_thread_stack() leaves .noinstr.text section

vmlinux.o: warning: objtool: enter_from_user_mode+0x4e: call to current_top_of_stack() leaves .noinstr.text section
vmlinux.o: warning: objtool: syscall_enter_from_user_mode+0x53: call to current_top_of_stack() leaves .noinstr.text section
vmlinux.o: warning: objtool: syscall_enter_from_user_mode_prepare+0x4e: call to current_top_of_stack() leaves .noinstr.text section
vmlinux.o: warning: objtool: irqentry_enter_from_user_mode+0x4e: call to current_top_of_stack() leaves .noinstr.text section

Signed-off-by: default avatarPeter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20220526105958.071435483@infradead.org
parent 656d054e

arch/x86/include/asm/processor.h

+2 −2
Original line number Diff line number Diff line
@@ -559,7 +559,7 @@ static __always_inline void native_swapgs(void) 
#endif

}



static inline unsigned long current_top_of_stack(void)

static __always_inline unsigned long current_top_of_stack(void)

{

	/*

	 *  We can't read directly from tss.sp0: sp0 on x86_32 is special in
@@ -569,7 +569,7 @@ static inline unsigned long current_top_of_stack(void) 
	return this_cpu_read_stable(cpu_current_top_of_stack);

}



static inline bool on_thread_stack(void)

static __always_inline bool on_thread_stack(void)

{

	return (unsigned long)(current_top_of_stack() -

			       current_stack_pointer) < THREAD_SIZE;