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Commit 0bfbf6a2 authored by Ralf Baechle's avatar Ralf Baechle
Browse files

MIPS: Make declarations and definitions of tlbmiss_handler_setup_pgd match. 



tlbmiss_handler_setup_pgd is run-time generated code and it was convenient
to pretend the symbol was an array in the generator but a function for
the users.  LTO gcc won't tolerate this kind of lie anymore so solve the
problem through a cast and function pointer instead.

Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
parent 86a1708a

arch/mips/include/asm/mmu_context.h

+9 −4
Original line number Diff line number Diff line
@@ -27,9 +27,14 @@ 
#ifdef CONFIG_MIPS_PGD_C0_CONTEXT



#define TLBMISS_HANDLER_SETUP_PGD(pgd)					\

	tlbmiss_handler_setup_pgd((unsigned long)(pgd))



extern void tlbmiss_handler_setup_pgd(unsigned long pgd);

do {									\

	void (*tlbmiss_handler_setup_pgd)(unsigned long);		\

	extern u32 tlbmiss_handler_setup_pgd_array[16];			\

									\

	tlbmiss_handler_setup_pgd =					\

		(__typeof__(tlbmiss_handler_setup_pgd)) tlbmiss_handler_setup_pgd_array; \

	tlbmiss_handler_setup_pgd((unsigned long)(pgd));		\

} while (0)



#define TLBMISS_HANDLER_SETUP()						\

	do {								\

arch/mips/mm/tlbex.c

+11 −11
Original line number Diff line number Diff line
@@ -1458,17 +1458,17 @@ u32 handle_tlbl[FASTPATH_SIZE] __cacheline_aligned; 
u32 handle_tlbs[FASTPATH_SIZE] __cacheline_aligned;

u32 handle_tlbm[FASTPATH_SIZE] __cacheline_aligned;

#ifdef CONFIG_MIPS_PGD_C0_CONTEXT

u32 tlbmiss_handler_setup_pgd[16] __cacheline_aligned;

u32 tlbmiss_handler_setup_pgd_array[16] __cacheline_aligned;



static void __cpuinit build_r4000_setup_pgd(void)

{

	const int a0 = 4;

	const int a1 = 5;

	u32 *p = tlbmiss_handler_setup_pgd;

	u32 *p = tlbmiss_handler_setup_pgd_array;

	struct uasm_label *l = labels;

	struct uasm_reloc *r = relocs;



	memset(tlbmiss_handler_setup_pgd, 0, sizeof(tlbmiss_handler_setup_pgd));

	memset(tlbmiss_handler_setup_pgd_array, 0, sizeof(tlbmiss_handler_setup_pgd_array));

	memset(labels, 0, sizeof(labels));

	memset(relocs, 0, sizeof(relocs));
@@ -1496,15 +1496,15 @@ static void __cpuinit build_r4000_setup_pgd(void) 
		uasm_i_jr(&p, 31);

		UASM_i_MTC0(&p, a0, 31, pgd_reg);

	}

	if (p - tlbmiss_handler_setup_pgd > ARRAY_SIZE(tlbmiss_handler_setup_pgd))

		panic("tlbmiss_handler_setup_pgd space exceeded");

	if (p - tlbmiss_handler_setup_pgd_array > ARRAY_SIZE(tlbmiss_handler_setup_pgd_array))

		panic("tlbmiss_handler_setup_pgd_array space exceeded");

	uasm_resolve_relocs(relocs, labels);

	pr_debug("Wrote tlbmiss_handler_setup_pgd (%u instructions).\n",

		 (unsigned int)(p - tlbmiss_handler_setup_pgd));

	pr_debug("Wrote tlbmiss_handler_setup_pgd_array (%u instructions).\n",

		 (unsigned int)(p - tlbmiss_handler_setup_pgd_array));



	dump_handler("tlbmiss_handler",

		     tlbmiss_handler_setup_pgd,

		     ARRAY_SIZE(tlbmiss_handler_setup_pgd));

		     tlbmiss_handler_setup_pgd_array,

		     ARRAY_SIZE(tlbmiss_handler_setup_pgd_array));

}

#endif
@@ -2207,7 +2207,7 @@ void __cpuinit flush_tlb_handlers(void) 
	local_flush_icache_range((unsigned long)handle_tlbm,

			   (unsigned long)handle_tlbm + sizeof(handle_tlbm));

#ifdef CONFIG_MIPS_PGD_C0_CONTEXT

	local_flush_icache_range((unsigned long)tlbmiss_handler_setup_pgd,

			   (unsigned long)tlbmiss_handler_setup_pgd + sizeof(handle_tlbm));

	local_flush_icache_range((unsigned long)tlbmiss_handler_setup_pgd_array,

			   (unsigned long)tlbmiss_handler_setup_pgd_array + sizeof(handle_tlbm));

#endif

}