Commit cd1a41ce authored by Thomas Gleixner's avatar Thomas Gleixner
Browse files

softirq: Move __ARCH_HAS_DO_SOFTIRQ to Kconfig 



To prepare for inlining do_softirq_own_stack() replace
__ARCH_HAS_DO_SOFTIRQ with a Kconfig switch and select it in the affected
architectures.

This allows in the next step to move the function prototype and the inline
stub into a seperate asm-generic header file which is required to avoid
include recursion.

Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
Reviewed-by: default avatarKees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20210210002513.181713427@linutronix.de
parent 624db9ea

arch/Kconfig

+6 −0
Original line number Diff line number Diff line
@@ -759,6 +759,12 @@ config HAVE_IRQ_EXIT_ON_IRQ_STACK 
	  This spares a stack switch and improves cache usage on softirq

	  processing.



config HAVE_SOFTIRQ_ON_OWN_STACK

	bool

	help

	  Architecture provides a function to run __do_softirq() on a

	  seperate stack.



config PGTABLE_LEVELS

	int

	default 2

arch/parisc/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -63,6 +63,7 @@ config PARISC 
	select HAVE_FTRACE_MCOUNT_RECORD if HAVE_DYNAMIC_FTRACE

	select HAVE_KPROBES_ON_FTRACE

	select HAVE_DYNAMIC_FTRACE_WITH_REGS

	select HAVE_SOFTIRQ_ON_OWN_STACK if IRQSTACKS

	select SET_FS



	help

arch/parisc/include/asm/hardirq.h

+0 −4
Original line number Diff line number Diff line
@@ -12,10 +12,6 @@ 
#include <linux/threads.h>

#include <linux/irq.h>



#ifdef CONFIG_IRQSTACKS

#define __ARCH_HAS_DO_SOFTIRQ

#endif



typedef struct {

	unsigned int __softirq_pending;

	unsigned int kernel_stack_usage;

arch/powerpc/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -237,6 +237,7 @@ config PPC 
	select MMU_GATHER_PAGE_SIZE

	select HAVE_REGS_AND_STACK_ACCESS_API

	select HAVE_RELIABLE_STACKTRACE		if PPC_BOOK3S_64 && CPU_LITTLE_ENDIAN

	select HAVE_SOFTIRQ_ON_OWN_STACK

	select HAVE_SYSCALL_TRACEPOINTS

	select HAVE_VIRT_CPU_ACCOUNTING

	select HAVE_IRQ_TIME_ACCOUNTING

arch/powerpc/include/asm/irq.h

+0 −2
Original line number Diff line number Diff line
@@ -37,8 +37,6 @@ extern int distribute_irqs; 


struct pt_regs;



#define __ARCH_HAS_DO_SOFTIRQ



#if defined(CONFIG_BOOKE) || defined(CONFIG_40x)

/*

 * Per-cpu stacks for handling critical, debug and machine check