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Merge pull request #806 from lemon1989/master

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fix: irq_backing_store to irq_stack_backing_store.
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0xAX 2022-07-31 14:51:05 +06:00 committed by GitHub
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4 changed files with 7 additions and 7 deletions
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2
Interrupts/linux-interrupts-1.md
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@ -372,7 +372,7 @@ int irq_init_percpu_irqstack(unsigned int cpu)
Here we go over all the CPUs one-by-one and setup the `hardirq_stack_ptr`.
Where `map_irq_stack` is called to initialize the `hardirq_stack_ptr`,
to point onto the `irq_backing_store` of the current CPU with an offset of IRQ\_STACK\_SIZE,
to point onto the `irq_stack_backing_store` of the current CPU with an offset of IRQ\_STACK\_SIZE,
either with guard pages or without when KASan is enabled.

2
Interrupts/linux-interrupts-2.md
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@ -357,7 +357,7 @@ $ sudo cat /proc/lockdep
redundant softirq offs: 0
```
Ok, now we know a little about tracing, but more info will be in the separate part about `lockdep` and `tracing`. You can see that the both `local_disable_irq` macros have the same part - `raw_local_irq_disable`. This macro defined in the [arch/x86/include/asm/irqflags.h](https://github.com/torvalds/linux/blob/16f73eb02d7e1765ccab3d2018e0bd98eb93d973/arch/x86/include/asm/irqflags.h) and expands to the call of the:
Ok, now we know a little about tracing, but more info will be in the separate part about `lockdep` and `tracing`. You can see that the both `local_irq_disable` macros have the same part - `raw_local_irq_disable`. This macro defined in the [arch/x86/include/asm/irqflags.h](https://github.com/torvalds/linux/blob/16f73eb02d7e1765ccab3d2018e0bd98eb93d973/arch/x86/include/asm/irqflags.h) and expands to the call of the:
```C
static inline void native_irq_disable(void)

2
Interrupts/linux-interrupts-5.md
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@ -150,7 +150,7 @@ enum ctx_state {
} state;
```
The second function is `exception_exit` defined in the same [include/linux/context_tracking.h](https://github.com/torvalds/linux/tree/master/include/linux/context_tracking.h) file and checks that context tracking is enabled and call the `contert_tracking_enter` function if the previous context was `user`:
The second function is `exception_exit` defined in the same [include/linux/context_tracking.h](https://github.com/torvalds/linux/tree/master/include/linux/context_tracking.h) file and checks that context tracking is enabled and call the `context_tracking_enter` function if the previous context was `user`:
```C
static inline void exception_exit(enum ctx_state prev_ctx)

2
Interrupts/linux-interrupts-6.md
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@ -169,7 +169,7 @@ pushq $-1
ALLOC_PT_GPREGS_ON_STACK
```
We already saw implementation of the `ALLOC_PT_GREGS_ON_STACK` macro in the third part of the interrupts [chapter](https://0xax.gitbook.io/linux-insides/summary/interrupts/linux-interrupts-3). This macro defined in the [arch/x86/entry/calling.h](https://github.com/torvalds/linux/blob/16f73eb02d7e1765ccab3d2018e0bd98eb93d973/arch/x86/entry/calling.h) and yet another allocates `120` bytes on stack for the general purpose registers, from the `rdi` to the `r15`:
We already saw implementation of the `ALLOC_PT_GPREGS_ON_STACK` macro in the third part of the interrupts [chapter](https://0xax.gitbook.io/linux-insides/summary/interrupts/linux-interrupts-3). This macro defined in the [arch/x86/entry/calling.h](https://github.com/torvalds/linux/blob/16f73eb02d7e1765ccab3d2018e0bd98eb93d973/arch/x86/entry/calling.h) and yet another allocates `120` bytes on stack for the general purpose registers, from the `rdi` to the `r15`:
```assembly
.macro ALLOC_PT_GPREGS_ON_STACK addskip=0