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MIPS: Make declarations and definitions of tlbmiss_handler_setup_pgd match.

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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: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Ralf Baechle 2013-03-21 11:28:10 +01:00
parent 86a1708a9d
commit 0bfbf6a256
2 changed files with 20 additions and 15 deletions
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13
arch/mips/include/asm/mmu_context.h
View File

@ -26,10 +26,15 @@
#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);
#define TLBMISS_HANDLER_SETUP_PGD(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 { \

22
arch/mips/mm/tlbex.c
View File

@ -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
}