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WSL2-Linux-Kernel
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powerpc: Replace open coded instruction patching with patch_instruction/patch_branch 

There are a few places we patch instructions without using
patch_instruction and patch_branch, probably because they
predated it. Fix it.

Signed-off-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Anton Blanchard 2011-04-04 23:56:18 +00:00 коммит произвёл Benjamin Herrenschmidt
Родитель f5be2dc0bd
Коммит b68a70c496
2 изменённых файлов: 30 добавлений и 20 удалений
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44
arch/powerpc/mm/hash_utils_64.c
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@ -53,6 +53,7 @@
#include <asm/sections.h>
#include <asm/spu.h>
#include <asm/udbg.h>
#include <asm/code-patching.h>
#ifdef DEBUG
#define DBG(fmt...) udbg_printf(fmt)
@ -547,15 +548,7 @@ int remove_section_mapping(unsigned long start, unsigned long end)
}
#endif /* CONFIG_MEMORY_HOTPLUG */
static inline void make_bl(unsigned int *insn_addr, void *func)
{
unsigned long funcp = *((unsigned long *)func);
int offset = funcp - (unsigned long)insn_addr;
*insn_addr = (unsigned int)(0x48000001 | (offset & 0x03fffffc));
flush_icache_range((unsigned long)insn_addr, 4+
(unsigned long)insn_addr);
}
#define FUNCTION_TEXT(A) ((*(unsigned long *)(A)))
static void __init htab_finish_init(void)
{
@ -570,16 +563,33 @@ static void __init htab_finish_init(void)
extern unsigned int *ht64_call_hpte_remove;
extern unsigned int *ht64_call_hpte_updatepp;
make_bl(ht64_call_hpte_insert1, ppc_md.hpte_insert);
make_bl(ht64_call_hpte_insert2, ppc_md.hpte_insert);
make_bl(ht64_call_hpte_remove, ppc_md.hpte_remove);
make_bl(ht64_call_hpte_updatepp, ppc_md.hpte_updatepp);
patch_branch(ht64_call_hpte_insert1,
FUNCTION_TEXT(ppc_md.hpte_insert),
BRANCH_SET_LINK);
patch_branch(ht64_call_hpte_insert2,
FUNCTION_TEXT(ppc_md.hpte_insert),
BRANCH_SET_LINK);
patch_branch(ht64_call_hpte_remove,
FUNCTION_TEXT(ppc_md.hpte_remove),
BRANCH_SET_LINK);
patch_branch(ht64_call_hpte_updatepp,
FUNCTION_TEXT(ppc_md.hpte_updatepp),
BRANCH_SET_LINK);
#endif /* CONFIG_PPC_HAS_HASH_64K */
make_bl(htab_call_hpte_insert1, ppc_md.hpte_insert);
make_bl(htab_call_hpte_insert2, ppc_md.hpte_insert);
make_bl(htab_call_hpte_remove, ppc_md.hpte_remove);
make_bl(htab_call_hpte_updatepp, ppc_md.hpte_updatepp);
patch_branch(htab_call_hpte_insert1,
FUNCTION_TEXT(ppc_md.hpte_insert),
BRANCH_SET_LINK);
patch_branch(htab_call_hpte_insert2,
FUNCTION_TEXT(ppc_md.hpte_insert),
BRANCH_SET_LINK);
patch_branch(htab_call_hpte_remove,
FUNCTION_TEXT(ppc_md.hpte_remove),
BRANCH_SET_LINK);
patch_branch(htab_call_hpte_updatepp,
FUNCTION_TEXT(ppc_md.hpte_updatepp),
BRANCH_SET_LINK);
}
static void __init htab_initialize(void)

6
arch/powerpc/mm/slb.c
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@ -24,6 +24,7 @@
#include <asm/firmware.h>
#include <linux/compiler.h>
#include <asm/udbg.h>
#include <asm/code-patching.h>
extern void slb_allocate_realmode(unsigned long ea);
@ -249,9 +250,8 @@ void switch_slb(struct task_struct *tsk, struct mm_struct *mm)
static inline void patch_slb_encoding(unsigned int *insn_addr,
unsigned int immed)
{
*insn_addr = (*insn_addr & 0xffff0000) | immed;
flush_icache_range((unsigned long)insn_addr, 4+
(unsigned long)insn_addr);
int insn = (*insn_addr & 0xffff0000) | immed;
patch_instruction(insn_addr, insn);
}
void slb_set_size(u16 size)