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MIPS: Remove get_fs/set_fs

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All get_fs/set_fs calls in MIPS code are gone, so remove implementation
of it.  With the clear separation of user/kernel space access we no
longer need the EVA special handling, so get rid of that, too.

Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Thomas Bogendoerfer
2021-04-01 14:56:37 +02:00
parent 45deb5faeb
commit 04324f44cb
11 changed files with 193 additions and 403 deletions
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48
arch/mips/lib/strncpy_user.S
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@@ -29,19 +29,17 @@
* it happens at most some bytes of the exceptions handlers will be copied.
*/
.macro __BUILD_STRNCPY_ASM func
LEAF(__strncpy_from_\func\()_asm)
LONG_L v0, TI_ADDR_LIMIT($28) # pointer ok?
and v0, a1
bnez v0, .Lfault\@
LEAF(__strncpy_from_user_asm)
move t0, zero
move v1, a1
.ifeqs "\func","kernel"
1: EX(lbu, v0, (v1), .Lfault\@)
.else
1: EX(lbue, v0, (v1), .Lfault\@)
.endif
#ifdef CONFIG_EVA
.set push
.set eva
1: EX(lbue, v0, (v1), .Lfault)
.set pop
#else
1: EX(lbu, v0, (v1), .Lfault)
#endif
PTR_ADDIU v1, 1
R10KCBARRIER(0(ra))
sb v0, (a0)
@@ -51,35 +49,17 @@ LEAF(__strncpy_from_\func\()_asm)
bne t0, a2, 1b
2: PTR_ADDU v0, a1, t0
xor v0, a1
bltz v0, .Lfault\@
bltz v0, .Lfault
move v0, t0
jr ra # return n
END(__strncpy_from_\func\()_asm)
END(__strncpy_from_user_asm)
.Lfault\@:
.Lfault:
li v0, -EFAULT
jr ra
.section __ex_table,"a"
PTR 1b, .Lfault\@
PTR 1b, .Lfault
.previous
.endm
#ifndef CONFIG_EVA
/* Set aliases */
.global __strncpy_from_user_asm
.set __strncpy_from_user_asm, __strncpy_from_kernel_asm
EXPORT_SYMBOL(__strncpy_from_user_asm)
#endif
__BUILD_STRNCPY_ASM kernel
EXPORT_SYMBOL(__strncpy_from_kernel_asm)
#ifdef CONFIG_EVA
.set push
.set eva
__BUILD_STRNCPY_ASM user
.set pop
EXPORT_SYMBOL(__strncpy_from_user_asm)
#endif
EXPORT_SYMBOL(__strncpy_from_user_asm)