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s390: enable CPU alternatives unconditionally

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Remove the CPU_ALTERNATIVES config option and enable the code
unconditionally. The config option was only added to avoid a conflict
with the named saved segment support. Since that code is gone there is
no reason to keep the CPU_ALTERNATIVES config option.

Just enable it unconditionally to also reduce the number of config
options and make it less likely that something breaks.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
This commit is contained in:
Heiko Carstens
2017-11-14 15:20:24 +01:00
parent a6de0a91d9
commit 049a2c2d48
4 changed files with 10 additions and 44 deletions
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20
arch/s390/include/asm/alternative.h
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@@ -15,14 +15,9 @@ struct alt_instr {
u8 replacementlen; /* length of new instruction */
} __packed;
#ifdef CONFIG_ALTERNATIVES
extern void apply_alternative_instructions(void);
extern void apply_alternatives(struct alt_instr *start, struct alt_instr *end);
#else
static inline void apply_alternative_instructions(void) {};
static inline void apply_alternatives(struct alt_instr *start,
struct alt_instr *end) {};
#endif
void apply_alternative_instructions(void);
void apply_alternatives(struct alt_instr *start, struct alt_instr *end);
/*
* |661: |662: |6620 |663:
* +-----------+---------------------+
@@ -109,7 +104,6 @@ static inline void apply_alternatives(struct alt_instr *start,
b_altinstr(num)":\n\t" altinstr "\n" e_altinstr(num) ":\n" \
INSTR_LEN_SANITY_CHECK(altinstr_len(num))
#ifdef CONFIG_ALTERNATIVES
/* alternative assembly primitive: */
#define ALTERNATIVE(oldinstr, altinstr, facility) \
".pushsection .altinstr_replacement, \"ax\"\n" \
@@ -130,14 +124,6 @@ static inline void apply_alternatives(struct alt_instr *start,
ALTINSTR_ENTRY(facility1, 1) \
ALTINSTR_ENTRY(facility2, 2) \
".popsection\n"
#else
/* Alternative instructions are disabled, let's put just oldinstr in */
#define ALTERNATIVE(oldinstr, altinstr, facility) \
oldinstr "\n"
#define ALTERNATIVE_2(oldinstr, altinstr1, facility1, altinstr2, facility2) \
oldinstr "\n"
#endif
/*
* Alternative instructions for different CPU types or capabilities.