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x86: separate extable.h, switch sections.h to it
drivers/platform/x86/dell-smo8800.c is touched due to the following obscenity: drivers/platform/x86/dell-smo8800.c -> linux/interrupt.h -> linux/hardirq.h -> asm/hardirq.h -> linux/irq.h -> asm/hw_irq.h -> asm/sections.h -> asm/uaccess.h is the only chain of includes pulling asm/uaccess.h there. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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Al Viro
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Sep 28, 2016
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Original file line number | Diff line number | Diff line change |
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@@ -0,0 +1,35 @@ | ||
#ifndef _ASM_X86_EXTABLE_H | ||
#define _ASM_X86_EXTABLE_H | ||
/* | ||
* The exception table consists of triples of addresses relative to the | ||
* exception table entry itself. The first address is of an instruction | ||
* that is allowed to fault, the second is the target at which the program | ||
* should continue. The third is a handler function to deal with the fault | ||
* caused by the instruction in the first field. | ||
* | ||
* All the routines below use bits of fixup code that are out of line | ||
* with the main instruction path. This means when everything is well, | ||
* we don't even have to jump over them. Further, they do not intrude | ||
* on our cache or tlb entries. | ||
*/ | ||
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struct exception_table_entry { | ||
int insn, fixup, handler; | ||
}; | ||
struct pt_regs; | ||
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#define ARCH_HAS_RELATIVE_EXTABLE | ||
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#define swap_ex_entry_fixup(a, b, tmp, delta) \ | ||
do { \ | ||
(a)->fixup = (b)->fixup + (delta); \ | ||
(b)->fixup = (tmp).fixup - (delta); \ | ||
(a)->handler = (b)->handler + (delta); \ | ||
(b)->handler = (tmp).handler - (delta); \ | ||
} while (0) | ||
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extern int fixup_exception(struct pt_regs *regs, int trapnr); | ||
extern bool ex_has_fault_handler(unsigned long ip); | ||
extern void early_fixup_exception(struct pt_regs *regs, int trapnr); | ||
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#endif |
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