Commit 41b464e5 authored by Benjamin Herrenschmidt's avatar Benjamin Herrenschmidt Committed by Michael Ellerman

powerpc/mm: Move out definition of CPU specific is_write bits

Define a common page_fault_is_write() helper and use it
Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
parent b4c001dc
...@@ -182,6 +182,16 @@ static int mm_fault_error(struct pt_regs *regs, unsigned long addr, int fault) ...@@ -182,6 +182,16 @@ static int mm_fault_error(struct pt_regs *regs, unsigned long addr, int fault)
return MM_FAULT_CONTINUE; return MM_FAULT_CONTINUE;
} }
/*
* Define the correct "is_write" bit in error_code based
* on the processor family
*/
#if (defined(CONFIG_4xx) || defined(CONFIG_BOOKE))
#define page_fault_is_write(__err) ((__err) & ESR_DST)
#else
#define page_fault_is_write(__err) ((__err) & DSISR_ISSTORE)
#endif
/* /*
* For 600- and 800-family processors, the error_code parameter is DSISR * For 600- and 800-family processors, the error_code parameter is DSISR
* for a data fault, SRR1 for an instruction fault. For 400-family processors * for a data fault, SRR1 for an instruction fault. For 400-family processors
...@@ -202,18 +212,12 @@ static int __do_page_fault(struct pt_regs *regs, unsigned long address, ...@@ -202,18 +212,12 @@ static int __do_page_fault(struct pt_regs *regs, unsigned long address,
struct mm_struct *mm = current->mm; struct mm_struct *mm = current->mm;
unsigned int flags = FAULT_FLAG_ALLOW_RETRY | FAULT_FLAG_KILLABLE; unsigned int flags = FAULT_FLAG_ALLOW_RETRY | FAULT_FLAG_KILLABLE;
int code = SEGV_MAPERR; int code = SEGV_MAPERR;
int is_write = 0;
int is_exec = TRAP(regs) == 0x400; int is_exec = TRAP(regs) == 0x400;
int is_user = user_mode(regs); int is_user = user_mode(regs);
int is_write = page_fault_is_write(error_code);
int fault; int fault;
int rc = 0, store_update_sp = 0; int rc = 0, store_update_sp = 0;
#if !(defined(CONFIG_4xx) || defined(CONFIG_BOOKE))
is_write = error_code & DSISR_ISSTORE;
#else
is_write = error_code & ESR_DST;
#endif /* CONFIG_4xx || CONFIG_BOOKE */
#ifdef CONFIG_PPC_ICSWX #ifdef CONFIG_PPC_ICSWX
/* /*
* we need to do this early because this "data storage * we need to do this early because this "data storage
......
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