diff options
Diffstat (limited to 'debian/patches-rt/arch-Disable-softirq-stacks-on-PREEMPT_RT.patch')
| -rw-r--r-- | debian/patches-rt/arch-Disable-softirq-stacks-on-PREEMPT_RT.patch | 151 |
1 files changed, 0 insertions, 151 deletions
diff --git a/debian/patches-rt/arch-Disable-softirq-stacks-on-PREEMPT_RT.patch b/debian/patches-rt/arch-Disable-softirq-stacks-on-PREEMPT_RT.patch deleted file mode 100644 index 7a19662c0..000000000 --- a/debian/patches-rt/arch-Disable-softirq-stacks-on-PREEMPT_RT.patch +++ /dev/null @@ -1,151 +0,0 @@ -From: Sebastian Andrzej Siewior <bigeasy@linutronix.de> -Date: Tue, 14 Jun 2022 20:18:14 +0200 -Subject: [PATCH] arch/*: Disable softirq stacks on PREEMPT_RT. -Origin: https://www.kernel.org/pub/linux/kernel/projects/rt/5.19/older/patches-5.19-rc8-rt9.tar.xz - -PREEMPT_RT preempts softirqs and the current implementation avoids -do_softirq_own_stack() and only uses __do_softirq(). - -Disable the unused softirqs stacks on PREEMPT_RT to save some memory and -ensure that do_softirq_own_stack() is not used bwcause it is not expected. - -Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> -Signed-off-by: Arnd Bergmann <arnd@arndb.de> -Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> -Link: https://lkml.kernel.org/r/CAK8P3a1QmeAscV-Ory-Dae4RoLvDSPEjEgFGQHR9U8jUervGuA@mail.gmail.com ---- - arch/arm/kernel/irq.c | 3 ++- - arch/parisc/kernel/irq.c | 2 ++ - arch/powerpc/kernel/irq.c | 4 ++++ - arch/s390/include/asm/softirq_stack.h | 3 ++- - arch/sh/kernel/irq.c | 2 ++ - arch/sparc/kernel/irq_64.c | 2 ++ - include/asm-generic/softirq_stack.h | 2 +- - 7 files changed, 15 insertions(+), 3 deletions(-) - ---- a/arch/arm/kernel/irq.c -+++ b/arch/arm/kernel/irq.c -@@ -70,6 +70,7 @@ static void __init init_irq_stacks(void) - } - } - -+#ifndef CONFIG_PREEMPT_RT - static void ____do_softirq(void *arg) - { - __do_softirq(); -@@ -80,7 +81,7 @@ void do_softirq_own_stack(void) - call_with_stack(____do_softirq, NULL, - __this_cpu_read(irq_stack_ptr)); - } -- -+#endif - #endif - - int arch_show_interrupts(struct seq_file *p, int prec) ---- a/arch/parisc/kernel/irq.c -+++ b/arch/parisc/kernel/irq.c -@@ -480,10 +480,12 @@ static void execute_on_irq_stack(void *f - *irq_stack_in_use = 1; - } - -+#ifndef CONFIG_PREEMPT_RT - void do_softirq_own_stack(void) - { - execute_on_irq_stack(__do_softirq, 0); - } -+#endif - #endif /* CONFIG_IRQSTACKS */ - - /* ONLY called from entry.S:intr_extint() */ ---- a/arch/powerpc/kernel/irq.c -+++ b/arch/powerpc/kernel/irq.c -@@ -611,6 +611,7 @@ static inline void check_stack_overflow( - } - } - -+#ifndef CONFIG_PREEMPT_RT - static __always_inline void call_do_softirq(const void *sp) - { - /* Temporarily switch r1 to sp, call __do_softirq() then restore r1. */ -@@ -629,6 +630,7 @@ static __always_inline void call_do_soft - "r11", "r12" - ); - } -+#endif - - static __always_inline void call_do_irq(struct pt_regs *regs, void *sp) - { -@@ -747,10 +749,12 @@ void *mcheckirq_ctx[NR_CPUS] __read_most - void *softirq_ctx[NR_CPUS] __read_mostly; - void *hardirq_ctx[NR_CPUS] __read_mostly; - -+#ifndef CONFIG_PREEMPT_RT - void do_softirq_own_stack(void) - { - call_do_softirq(softirq_ctx[smp_processor_id()]); - } -+#endif - - irq_hw_number_t virq_to_hw(unsigned int virq) - { ---- a/arch/s390/include/asm/softirq_stack.h -+++ b/arch/s390/include/asm/softirq_stack.h -@@ -5,9 +5,10 @@ - #include <asm/lowcore.h> - #include <asm/stacktrace.h> - -+#ifndef CONFIG_PREEMPT_RT - static inline void do_softirq_own_stack(void) - { - call_on_stack(0, S390_lowcore.async_stack, void, __do_softirq); - } -- -+#endif - #endif /* __ASM_S390_SOFTIRQ_STACK_H */ ---- a/arch/sh/kernel/irq.c -+++ b/arch/sh/kernel/irq.c -@@ -149,6 +149,7 @@ void irq_ctx_exit(int cpu) - hardirq_ctx[cpu] = NULL; - } - -+#ifndef CONFIG_PREEMPT_RT - void do_softirq_own_stack(void) - { - struct thread_info *curctx; -@@ -176,6 +177,7 @@ void do_softirq_own_stack(void) - "r5", "r6", "r7", "r8", "r9", "r15", "t", "pr" - ); - } -+#endif - #else - static inline void handle_one_irq(unsigned int irq) - { ---- a/arch/sparc/kernel/irq_64.c -+++ b/arch/sparc/kernel/irq_64.c -@@ -855,6 +855,7 @@ void __irq_entry handler_irq(int pil, st - set_irq_regs(old_regs); - } - -+#ifndef CONFIG_PREEMPT_RT - void do_softirq_own_stack(void) - { - void *orig_sp, *sp = softirq_stack[smp_processor_id()]; -@@ -869,6 +870,7 @@ void do_softirq_own_stack(void) - __asm__ __volatile__("mov %0, %%sp" - : : "r" (orig_sp)); - } -+#endif - - #ifdef CONFIG_HOTPLUG_CPU - void fixup_irqs(void) ---- a/include/asm-generic/softirq_stack.h -+++ b/include/asm-generic/softirq_stack.h -@@ -2,7 +2,7 @@ - #ifndef __ASM_GENERIC_SOFTIRQ_STACK_H - #define __ASM_GENERIC_SOFTIRQ_STACK_H - --#ifdef CONFIG_HAVE_SOFTIRQ_ON_OWN_STACK -+#if defined(CONFIG_HAVE_SOFTIRQ_ON_OWN_STACK) && !defined(CONFIG_PREEMPT_RT) - void do_softirq_own_stack(void); - #else - static inline void do_softirq_own_stack(void) |