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authorAl Viro <viro@zeniv.linux.org.uk>2017-04-08 00:20:01 +0300
committerAl Viro <viro@zeniv.linux.org.uk>2017-05-16 06:40:22 +0300
commit82985258390e85289940d3663344197344e071f2 (patch)
tree9209037b20e4c5117b87a03e0add1c305c4eb25f
parent2ea659a9ef488125eb46da6eb571de5eae5c43f6 (diff)
downloadlinux-82985258390e85289940d3663344197344e071f2.tar.xz
kill strlen_user()
no callers, no consistent semantics, no sane way to use it... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
-rw-r--r--arch/alpha/include/asm/uaccess.h1
-rw-r--r--arch/arm/include/asm/uaccess.h1
-rw-r--r--arch/arm64/include/asm/uaccess.h1
-rw-r--r--arch/blackfin/include/asm/uaccess.h7
-rw-r--r--arch/cris/include/asm/uaccess.h2
-rw-r--r--arch/frv/include/asm/uaccess.h2
-rw-r--r--arch/ia64/include/asm/uaccess.h12
-rw-r--r--arch/ia64/lib/Makefile2
-rw-r--r--arch/ia64/lib/strlen_user.S200
-rw-r--r--arch/m32r/include/asm/uaccess.h16
-rw-r--r--arch/m68k/include/asm/uaccess_mm.h1
-rw-r--r--arch/m68k/include/asm/uaccess_no.h2
-rw-r--r--arch/metag/include/asm/uaccess.h2
-rw-r--r--arch/mips/include/asm/uaccess.h44
-rw-r--r--arch/mips/lib/Makefile2
-rw-r--r--arch/mips/lib/strlen_user.S65
-rw-r--r--arch/mn10300/include/asm/uaccess.h1
-rw-r--r--arch/openrisc/include/asm/uaccess.h1
-rw-r--r--arch/parisc/include/asm/uaccess.h1
-rw-r--r--arch/powerpc/include/asm/uaccess.h1
-rw-r--r--arch/s390/include/asm/uaccess.h17
-rw-r--r--arch/score/include/asm/uaccess.h6
-rw-r--r--arch/score/lib/string.S28
-rw-r--r--arch/sh/include/asm/uaccess.h1
-rw-r--r--arch/sparc/include/asm/uaccess_32.h1
-rw-r--r--arch/sparc/include/asm/uaccess_64.h1
-rw-r--r--arch/tile/include/asm/uaccess.h1
-rw-r--r--arch/um/kernel/process.c5
-rw-r--r--arch/x86/include/asm/uaccess.h1
-rw-r--r--arch/xtensa/include/asm/uaccess.h3
-rw-r--r--include/asm-generic/uaccess.h5
-rw-r--r--lib/strnlen_user.c34
32 files changed, 2 insertions, 465 deletions
diff --git a/arch/alpha/include/asm/uaccess.h b/arch/alpha/include/asm/uaccess.h
index 7b82dc9a8556..133a4884ed44 100644
--- a/arch/alpha/include/asm/uaccess.h
+++ b/arch/alpha/include/asm/uaccess.h
@@ -326,7 +326,6 @@ clear_user(void __user *to, long len)
(uaccess_kernel() ? ~0UL : TASK_SIZE)
extern long strncpy_from_user(char *dest, const char __user *src, long count);
-extern __must_check long strlen_user(const char __user *str);
extern __must_check long strnlen_user(const char __user *str, long n);
#include <asm/extable.h>
diff --git a/arch/arm/include/asm/uaccess.h b/arch/arm/include/asm/uaccess.h
index 2577405d082d..6838abc04279 100644
--- a/arch/arm/include/asm/uaccess.h
+++ b/arch/arm/include/asm/uaccess.h
@@ -526,7 +526,6 @@ static inline unsigned long __must_check clear_user(void __user *to, unsigned lo
/* These are from lib/ code, and use __get_user() and friends */
extern long strncpy_from_user(char *dest, const char __user *src, long count);
-extern __must_check long strlen_user(const char __user *str);
extern __must_check long strnlen_user(const char __user *str, long n);
#endif /* _ASMARM_UACCESS_H */
diff --git a/arch/arm64/include/asm/uaccess.h b/arch/arm64/include/asm/uaccess.h
index 7b8a04789cef..59f09e6a6cb8 100644
--- a/arch/arm64/include/asm/uaccess.h
+++ b/arch/arm64/include/asm/uaccess.h
@@ -349,7 +349,6 @@ static inline unsigned long __must_check clear_user(void __user *to, unsigned lo
extern long strncpy_from_user(char *dest, const char __user *src, long count);
-extern __must_check long strlen_user(const char __user *str);
extern __must_check long strnlen_user(const char __user *str, long n);
#endif /* __ASM_UACCESS_H */
diff --git a/arch/blackfin/include/asm/uaccess.h b/arch/blackfin/include/asm/uaccess.h
index f54a34f31cea..45da4bcb050e 100644
--- a/arch/blackfin/include/asm/uaccess.h
+++ b/arch/blackfin/include/asm/uaccess.h
@@ -194,13 +194,6 @@ static inline long __must_check strnlen_user(const char __user *src, long n)
return strnlen((const char __force *)src, n) + 1;
}
-static inline long __must_check strlen_user(const char __user *src)
-{
- if (!access_ok(VERIFY_READ, src, 1))
- return 0;
- return strlen((const char __force *)src) + 1;
-}
-
/*
* Zero Userspace
*/
diff --git a/arch/cris/include/asm/uaccess.h b/arch/cris/include/asm/uaccess.h
index 0d473aec3066..98bfa4e060da 100644
--- a/arch/cris/include/asm/uaccess.h
+++ b/arch/cris/include/asm/uaccess.h
@@ -363,6 +363,4 @@ __clear_user(void __user *to, unsigned long n)
return __do_clear_user(to, n);
}
-#define strlen_user(str) strnlen_user((str), 0x7ffffffe)
-
#endif /* _CRIS_UACCESS_H */
diff --git a/arch/frv/include/asm/uaccess.h b/arch/frv/include/asm/uaccess.h
index e4e33b4cd3ae..ff9562dc6825 100644
--- a/arch/frv/include/asm/uaccess.h
+++ b/arch/frv/include/asm/uaccess.h
@@ -282,6 +282,4 @@ clear_user(void __user *to, unsigned long n)
extern long strncpy_from_user(char *dst, const char __user *src, long count);
extern long strnlen_user(const char __user *src, long count);
-#define strlen_user(str) strnlen_user(str, 32767)
-
#endif /* _ASM_UACCESS_H */
diff --git a/arch/ia64/include/asm/uaccess.h b/arch/ia64/include/asm/uaccess.h
index 82a7646c4416..b2106b01e84f 100644
--- a/arch/ia64/include/asm/uaccess.h
+++ b/arch/ia64/include/asm/uaccess.h
@@ -277,18 +277,6 @@ extern long __must_check __strncpy_from_user (char *to, const char __user *from,
__sfu_ret; \
})
-/* Returns: 0 if bad, string length+1 (memory size) of string if ok */
-extern unsigned long __strlen_user (const char __user *);
-
-#define strlen_user(str) \
-({ \
- const char __user *__su_str = (str); \
- unsigned long __su_ret = 0; \
- if (__access_ok(__su_str, 0)) \
- __su_ret = __strlen_user(__su_str); \
- __su_ret; \
-})
-
/*
* Returns: 0 if exception before NUL or reaching the supplied limit
* (N), a value greater than N if the limit would be exceeded, else
diff --git a/arch/ia64/lib/Makefile b/arch/ia64/lib/Makefile
index 0a40b14407b1..1a36a3a39624 100644
--- a/arch/ia64/lib/Makefile
+++ b/arch/ia64/lib/Makefile
@@ -5,7 +5,7 @@
lib-y := io.o __divsi3.o __udivsi3.o __modsi3.o __umodsi3.o \
__divdi3.o __udivdi3.o __moddi3.o __umoddi3.o \
checksum.o clear_page.o csum_partial_copy.o \
- clear_user.o strncpy_from_user.o strlen_user.o strnlen_user.o \
+ clear_user.o strncpy_from_user.o strnlen_user.o \
flush.o ip_fast_csum.o do_csum.o \
memset.o strlen.o xor.o
diff --git a/arch/ia64/lib/strlen_user.S b/arch/ia64/lib/strlen_user.S
deleted file mode 100644
index 9d257684e733..000000000000
--- a/arch/ia64/lib/strlen_user.S
+++ /dev/null
@@ -1,200 +0,0 @@
-/*
- * Optimized version of the strlen_user() function
- *
- * Inputs:
- * in0 address of buffer
- *
- * Outputs:
- * ret0 0 in case of fault, strlen(buffer)+1 otherwise
- *
- * Copyright (C) 1998, 1999, 2001 Hewlett-Packard Co
- * David Mosberger-Tang <davidm@hpl.hp.com>
- * Stephane Eranian <eranian@hpl.hp.com>
- *
- * 01/19/99 S.Eranian heavily enhanced version (see details below)
- * 09/24/99 S.Eranian added speculation recovery code
- */
-
-#include <asm/asmmacro.h>
-#include <asm/export.h>
-
-//
-// int strlen_user(char *)
-// ------------------------
-// Returns:
-// - length of string + 1
-// - 0 in case an exception is raised
-//
-// This is an enhanced version of the basic strlen_user. it includes a
-// combination of compute zero index (czx), parallel comparisons, speculative
-// loads and loop unroll using rotating registers.
-//
-// General Ideas about the algorithm:
-// The goal is to look at the string in chunks of 8 bytes.
-// so we need to do a few extra checks at the beginning because the
-// string may not be 8-byte aligned. In this case we load the 8byte
-// quantity which includes the start of the string and mask the unused
-// bytes with 0xff to avoid confusing czx.
-// We use speculative loads and software pipelining to hide memory
-// latency and do read ahead safely. This way we defer any exception.
-//
-// Because we don't want the kernel to be relying on particular
-// settings of the DCR register, we provide recovery code in case
-// speculation fails. The recovery code is going to "redo" the work using
-// only normal loads. If we still get a fault then we return an
-// error (ret0=0). Otherwise we return the strlen+1 as usual.
-// The fact that speculation may fail can be caused, for instance, by
-// the DCR.dm bit being set. In this case TLB misses are deferred, i.e.,
-// a NaT bit will be set if the translation is not present. The normal
-// load, on the other hand, will cause the translation to be inserted
-// if the mapping exists.
-//
-// It should be noted that we execute recovery code only when we need
-// to use the data that has been speculatively loaded: we don't execute
-// recovery code on pure read ahead data.
-//
-// Remarks:
-// - the cmp r0,r0 is used as a fast way to initialize a predicate
-// register to 1. This is required to make sure that we get the parallel
-// compare correct.
-//
-// - we don't use the epilogue counter to exit the loop but we need to set
-// it to zero beforehand.
-//
-// - after the loop we must test for Nat values because neither the
-// czx nor cmp instruction raise a NaT consumption fault. We must be
-// careful not to look too far for a Nat for which we don't care.
-// For instance we don't need to look at a NaT in val2 if the zero byte
-// was in val1.
-//
-// - Clearly performance tuning is required.
-//
-
-#define saved_pfs r11
-#define tmp r10
-#define base r16
-#define orig r17
-#define saved_pr r18
-#define src r19
-#define mask r20
-#define val r21
-#define val1 r22
-#define val2 r23
-
-GLOBAL_ENTRY(__strlen_user)
- .prologue
- .save ar.pfs, saved_pfs
- alloc saved_pfs=ar.pfs,11,0,0,8
-
- .rotr v[2], w[2] // declares our 4 aliases
-
- extr.u tmp=in0,0,3 // tmp=least significant 3 bits
- mov orig=in0 // keep trackof initial byte address
- dep src=0,in0,0,3 // src=8byte-aligned in0 address
- .save pr, saved_pr
- mov saved_pr=pr // preserve predicates (rotation)
- ;;
-
- .body
-
- ld8.s v[1]=[src],8 // load the initial 8bytes (must speculate)
- shl tmp=tmp,3 // multiply by 8bits/byte
- mov mask=-1 // our mask
- ;;
- ld8.s w[1]=[src],8 // load next 8 bytes in 2nd pipeline
- cmp.eq p6,p0=r0,r0 // sets p6 (required because of // cmp.and)
- sub tmp=64,tmp // how many bits to shift our mask on the right
- ;;
- shr.u mask=mask,tmp // zero enough bits to hold v[1] valuable part
- mov ar.ec=r0 // clear epilogue counter (saved in ar.pfs)
- ;;
- add base=-16,src // keep track of aligned base
- chk.s v[1], .recover // if already NaT, then directly skip to recover
- or v[1]=v[1],mask // now we have a safe initial byte pattern
- ;;
-1:
- ld8.s v[0]=[src],8 // speculatively load next
- czx1.r val1=v[1] // search 0 byte from right
- czx1.r val2=w[1] // search 0 byte from right following 8bytes
- ;;
- ld8.s w[0]=[src],8 // speculatively load next to next
- cmp.eq.and p6,p0=8,val1 // p6 = p6 and val1==8
- cmp.eq.and p6,p0=8,val2 // p6 = p6 and mask==8
-(p6) br.wtop.dptk.few 1b // loop until p6 == 0
- ;;
- //
- // We must return try the recovery code iff
- // val1_is_nat || (val1==8 && val2_is_nat)
- //
- // XXX Fixme
- // - there must be a better way of doing the test
- //
- cmp.eq p8,p9=8,val1 // p6 = val1 had zero (disambiguate)
- tnat.nz p6,p7=val1 // test NaT on val1
-(p6) br.cond.spnt .recover // jump to recovery if val1 is NaT
- ;;
- //
- // if we come here p7 is true, i.e., initialized for // cmp
- //
- cmp.eq.and p7,p0=8,val1// val1==8?
- tnat.nz.and p7,p0=val2 // test NaT if val2
-(p7) br.cond.spnt .recover // jump to recovery if val2 is NaT
- ;;
-(p8) mov val1=val2 // val2 contains the value
-(p8) adds src=-16,src // correct position when 3 ahead
-(p9) adds src=-24,src // correct position when 4 ahead
- ;;
- sub ret0=src,orig // distance from origin
- sub tmp=7,val1 // 7=8-1 because this strlen returns strlen+1
- mov pr=saved_pr,0xffffffffffff0000
- ;;
- sub ret0=ret0,tmp // length=now - back -1
- mov ar.pfs=saved_pfs // because of ar.ec, restore no matter what
- br.ret.sptk.many rp // end of normal execution
-
- //
- // Outlined recovery code when speculation failed
- //
- // This time we don't use speculation and rely on the normal exception
- // mechanism. that's why the loop is not as good as the previous one
- // because read ahead is not possible
- //
- // XXX Fixme
- // - today we restart from the beginning of the string instead
- // of trying to continue where we left off.
- //
-.recover:
- EX(.Lexit1, ld8 val=[base],8) // load the initial bytes
- ;;
- or val=val,mask // remask first bytes
- cmp.eq p0,p6=r0,r0 // nullify first ld8 in loop
- ;;
- //
- // ar.ec is still zero here
- //
-2:
- EX(.Lexit1, (p6) ld8 val=[base],8)
- ;;
- czx1.r val1=val // search 0 byte from right
- ;;
- cmp.eq p6,p0=8,val1 // val1==8 ?
-(p6) br.wtop.dptk.few 2b // loop until p6 == 0
- ;;
- sub ret0=base,orig // distance from base
- sub tmp=7,val1 // 7=8-1 because this strlen returns strlen+1
- mov pr=saved_pr,0xffffffffffff0000
- ;;
- sub ret0=ret0,tmp // length=now - back -1
- mov ar.pfs=saved_pfs // because of ar.ec, restore no matter what
- br.ret.sptk.many rp // end of successful recovery code
-
- //
- // We failed even on the normal load (called from exception handler)
- //
-.Lexit1:
- mov ret0=0
- mov pr=saved_pr,0xffffffffffff0000
- mov ar.pfs=saved_pfs // because of ar.ec, restore no matter what
- br.ret.sptk.many rp
-END(__strlen_user)
-EXPORT_SYMBOL(__strlen_user)
diff --git a/arch/m32r/include/asm/uaccess.h b/arch/m32r/include/asm/uaccess.h
index 07be349c00ad..0273d0481edc 100644
--- a/arch/m32r/include/asm/uaccess.h
+++ b/arch/m32r/include/asm/uaccess.h
@@ -511,22 +511,6 @@ unsigned long __clear_user(void __user *mem, unsigned long len);
*/
unsigned long clear_user(void __user *mem, unsigned long len);
-/**
- * strlen_user: - Get the size of a string in user space.
- * @str: The string to measure.
- *
- * Context: User context only. This function may sleep if pagefaults are
- * enabled.
- *
- * Get the size of a NUL-terminated string in user space.
- *
- * Returns the size of the string INCLUDING the terminating NUL.
- * On exception, returns 0.
- *
- * If there is a limit on the length of a valid string, you may wish to
- * consider using strnlen_user() instead.
- */
-#define strlen_user(str) strnlen_user(str, ~0UL >> 1)
long strnlen_user(const char __user *str, long n);
#endif /* _ASM_M32R_UACCESS_H */
diff --git a/arch/m68k/include/asm/uaccess_mm.h b/arch/m68k/include/asm/uaccess_mm.h
index ef856ffeffdf..1da1e23de74c 100644
--- a/arch/m68k/include/asm/uaccess_mm.h
+++ b/arch/m68k/include/asm/uaccess_mm.h
@@ -378,7 +378,6 @@ raw_copy_to_user(void __user *to, const void *from, unsigned long n)
(uaccess_kernel() ? ~0UL : TASK_SIZE)
extern long strncpy_from_user(char *dst, const char __user *src, long count);
-extern __must_check long strlen_user(const char __user *str);
extern __must_check long strnlen_user(const char __user *str, long n);
unsigned long __clear_user(void __user *to, unsigned long n);
diff --git a/arch/m68k/include/asm/uaccess_no.h b/arch/m68k/include/asm/uaccess_no.h
index e482c3899ff1..53d7b792a43d 100644
--- a/arch/m68k/include/asm/uaccess_no.h
+++ b/arch/m68k/include/asm/uaccess_no.h
@@ -141,8 +141,6 @@ static inline long strnlen_user(const char *src, long n)
return(strlen(src) + 1); /* DAVIDM make safer */
}
-#define strlen_user(str) strnlen_user(str, 32767)
-
/*
* Zero Userspace
*/
diff --git a/arch/metag/include/asm/uaccess.h b/arch/metag/include/asm/uaccess.h
index 9c8fbf8fb5aa..47469e26641a 100644
--- a/arch/metag/include/asm/uaccess.h
+++ b/arch/metag/include/asm/uaccess.h
@@ -188,8 +188,6 @@ strncpy_from_user(char *dst, const char __user *src, long count)
*/
extern long __must_check strnlen_user(const char __user *src, long count);
-#define strlen_user(str) strnlen_user(str, 32767)
-
extern unsigned long raw_copy_from_user(void *to, const void __user *from,
unsigned long n);
extern unsigned long raw_copy_to_user(void __user *to, const void *from,
diff --git a/arch/mips/include/asm/uaccess.h b/arch/mips/include/asm/uaccess.h
index 99e629a590a5..846628eee108 100644
--- a/arch/mips/include/asm/uaccess.h
+++ b/arch/mips/include/asm/uaccess.h
@@ -1073,50 +1073,6 @@ strncpy_from_user(char *__to, const char __user *__from, long __len)
return res;
}
-extern long __strlen_kernel_asm(const char __user *s);
-extern long __strlen_user_asm(const char __user *s);
-
-/*
- * strlen_user: - Get the size of a string in user space.
- * @str: The string to measure.
- *
- * Context: User context only. This function may sleep if pagefaults are
- * enabled.
- *
- * Get the size of a NUL-terminated string in user space.
- *
- * Returns the size of the string INCLUDING the terminating NUL.
- * On exception, returns 0.
- *
- * If there is a limit on the length of a valid string, you may wish to
- * consider using strnlen_user() instead.
- */
-static inline long strlen_user(const char __user *s)
-{
- long res;
-
- if (eva_kernel_access()) {
- __asm__ __volatile__(
- "move\t$4, %1\n\t"
- __MODULE_JAL(__strlen_kernel_asm)
- "move\t%0, $2"
- : "=r" (res)
- : "r" (s)
- : "$2", "$4", __UA_t0, "$31");
- } else {
- might_fault();
- __asm__ __volatile__(
- "move\t$4, %1\n\t"
- __MODULE_JAL(__strlen_user_asm)
- "move\t%0, $2"
- : "=r" (res)
- : "r" (s)
- : "$2", "$4", __UA_t0, "$31");
- }
-
- return res;
-}
-
extern long __strnlen_kernel_nocheck_asm(const char __user *s, long n);
extern long __strnlen_user_nocheck_asm(const char __user *s, long n);
diff --git a/arch/mips/lib/Makefile b/arch/mips/lib/Makefile
index 0344e575f522..a37fe3d1ee2f 100644
--- a/arch/mips/lib/Makefile
+++ b/arch/mips/lib/Makefile
@@ -3,7 +3,7 @@
#
lib-y += bitops.o csum_partial.o delay.o memcpy.o memset.o \
- mips-atomic.o strlen_user.o strncpy_user.o \
+ mips-atomic.o strncpy_user.o \
strnlen_user.o uncached.o
obj-y += iomap.o
diff --git a/arch/mips/lib/strlen_user.S b/arch/mips/lib/strlen_user.S
deleted file mode 100644
index 40be22625bc5..000000000000
--- a/arch/mips/lib/strlen_user.S
+++ /dev/null
@@ -1,65 +0,0 @@
-/*
- * This file is subject to the terms and conditions of the GNU General Public
- * License. See the file "COPYING" in the main directory of this archive
- * for more details.
- *
- * Copyright (C) 1996, 1998, 1999, 2004 by Ralf Baechle
- * Copyright (C) 1999 Silicon Graphics, Inc.
- * Copyright (C) 2011 MIPS Technologies, Inc.
- */
-#include <asm/asm.h>
-#include <asm/asm-offsets.h>
-#include <asm/export.h>
-#include <asm/regdef.h>
-
-#define EX(insn,reg,addr,handler) \
-9: insn reg, addr; \
- .section __ex_table,"a"; \
- PTR 9b, handler; \
- .previous
-
-/*
- * Return the size of a string (including the ending 0)
- *
- * Return 0 for error
- */
- .macro __BUILD_STRLEN_ASM func
-LEAF(__strlen_\func\()_asm)
- LONG_L v0, TI_ADDR_LIMIT($28) # pointer ok?
- and v0, a0
- bnez v0, .Lfault\@
-
- move v0, a0
-.ifeqs "\func", "kernel"
-1: EX(lbu, v1, (v0), .Lfault\@)
-.else
-1: EX(lbue, v1, (v0), .Lfault\@)
-.endif
- PTR_ADDIU v0, 1
- bnez v1, 1b
- PTR_SUBU v0, a0
- jr ra
- END(__strlen_\func\()_asm)
-
-.Lfault\@: move v0, zero
- jr ra
- .endm
-
-#ifndef CONFIG_EVA
- /* Set aliases */
- .global __strlen_user_asm
- .set __strlen_user_asm, __strlen_kernel_asm
-EXPORT_SYMBOL(__strlen_user_asm)
-#endif
-
-__BUILD_STRLEN_ASM kernel
-EXPORT_SYMBOL(__strlen_kernel_asm)
-
-#ifdef CONFIG_EVA
-
- .set push
- .set eva
-__BUILD_STRLEN_ASM user
- .set pop
-EXPORT_SYMBOL(__strlen_user_asm)
-#endif
diff --git a/arch/mn10300/include/asm/uaccess.h b/arch/mn10300/include/asm/uaccess.h
index c6966474827f..2e04ebb711c4 100644
--- a/arch/mn10300/include/asm/uaccess.h
+++ b/arch/mn10300/include/asm/uaccess.h
@@ -292,7 +292,6 @@ raw_copy_to_user(void __user *to, const void *from, unsigned long n)
extern long strncpy_from_user(char *dst, const char __user *src, long count);
extern long __strncpy_from_user(char *dst, const char __user *src, long count);
extern long strnlen_user(const char __user *str, long n);
-#define strlen_user(str) strnlen_user(str, ~0UL >> 1)
extern unsigned long clear_user(void __user *mem, unsigned long len);
extern unsigned long __clear_user(void __user *mem, unsigned long len);
diff --git a/arch/openrisc/include/asm/uaccess.h b/arch/openrisc/include/asm/uaccess.h
index a557a7cd0232..bbf5c79cce7a 100644
--- a/arch/openrisc/include/asm/uaccess.h
+++ b/arch/openrisc/include/asm/uaccess.h
@@ -264,7 +264,6 @@ clear_user(void *addr, unsigned long size)
extern long strncpy_from_user(char *dest, const char __user *src, long count);
-extern __must_check long strlen_user(const char __user *str);
extern __must_check long strnlen_user(const char __user *str, long n);
#endif /* __ASM_OPENRISC_UACCESS_H */
diff --git a/arch/parisc/include/asm/uaccess.h b/arch/parisc/include/asm/uaccess.h
index 6b113f39f30c..44299a21d687 100644
--- a/arch/parisc/include/asm/uaccess.h
+++ b/arch/parisc/include/asm/uaccess.h
@@ -220,7 +220,6 @@ extern long lstrnlen_user(const char __user *, long);
#define user_addr_max() (~0UL)
#define strnlen_user lstrnlen_user
-#define strlen_user(str) lstrnlen_user(str, 0x7fffffffL)
#define clear_user lclear_user
#define __clear_user lclear_user
diff --git a/arch/powerpc/include/asm/uaccess.h b/arch/powerpc/include/asm/uaccess.h
index 5c0d8a8cdae5..c67e0af8d12e 100644
--- a/arch/powerpc/include/asm/uaccess.h
+++ b/arch/powerpc/include/asm/uaccess.h
@@ -346,7 +346,6 @@ static inline unsigned long clear_user(void __user *addr, unsigned long size)
}
extern long strncpy_from_user(char *dst, const char __user *src, long count);
-extern __must_check long strlen_user(const char __user *str);
extern __must_check long strnlen_user(const char __user *str, long n);
#endif /* _ARCH_POWERPC_UACCESS_H */
diff --git a/arch/s390/include/asm/uaccess.h b/arch/s390/include/asm/uaccess.h
index 78f3f093d143..28b528197cf5 100644
--- a/arch/s390/include/asm/uaccess.h
+++ b/arch/s390/include/asm/uaccess.h
@@ -276,23 +276,6 @@ static inline unsigned long strnlen_user(const char __user *src, unsigned long n
return __strnlen_user(src, n);
}
-/**
- * strlen_user: - Get the size of a string in user space.
- * @str: The string to measure.
- *
- * Context: User context only. This function may sleep if pagefaults are
- * enabled.
- *
- * Get the size of a NUL-terminated string in user space.
- *
- * Returns the size of the string INCLUDING the terminating NUL.
- * On exception, returns 0.
- *
- * If there is a limit on the length of a valid string, you may wish to
- * consider using strnlen_user() instead.
- */
-#define strlen_user(str) strnlen_user(str, ~0UL)
-
/*
* Zero Userspace
*/
diff --git a/arch/score/include/asm/uaccess.h b/arch/score/include/asm/uaccess.h
index 916e5dbf0bfd..0ef220474d9b 100644
--- a/arch/score/include/asm/uaccess.h
+++ b/arch/score/include/asm/uaccess.h
@@ -359,12 +359,6 @@ static inline int strncpy_from_user(char *dst, const char *src, long len)
return -EFAULT;
}
-extern int __strlen_user(const char *src);
-static inline long strlen_user(const char __user *src)
-{
- return __strlen_user(src);
-}
-
extern int __strnlen_user(const char *str, long len);
static inline long strnlen_user(const char __user *str, long len)
{
diff --git a/arch/score/lib/string.S b/arch/score/lib/string.S
index 16efa3ad037f..e0c0318c9010 100644
--- a/arch/score/lib/string.S
+++ b/arch/score/lib/string.S
@@ -104,34 +104,6 @@ ENTRY(__strnlen_user)
.previous
.align 2
-ENTRY(__strlen_user)
-0: lb r6, [r4]
- mv r7, r4
- extsb r6, r6
- cmpi.c r6, 0
- mv r4, r6
- beq .L27
-.L28:
-1: lb r6, [r7, 1]+
- addi r6, 1
- cmpi.c r6, 0
- bne .L28
-.L27:
- br r3
- .section .fixup, "ax"
- ldi r4, 0x0
- br r3
-99:
- ldi r4, 0
- br r3
- .previous
- .section __ex_table, "a"
- .align 2
- .word 0b ,99b
- .word 1b ,99b
- .previous
-
- .align 2
ENTRY(__copy_tofrom_user)
cmpi.c r6, 0
mv r10,r6
diff --git a/arch/sh/include/asm/uaccess.h b/arch/sh/include/asm/uaccess.h
index 2722b61b2283..211b44920dbe 100644
--- a/arch/sh/include/asm/uaccess.h
+++ b/arch/sh/include/asm/uaccess.h
@@ -100,7 +100,6 @@ struct __large_struct { unsigned long buf[100]; };
extern long strncpy_from_user(char *dest, const char __user *src, long count);
-extern __must_check long strlen_user(const char __user *str);
extern __must_check long strnlen_user(const char __user *str, long n);
/* Generic arbitrary sized copy. */
diff --git a/arch/sparc/include/asm/uaccess_32.h b/arch/sparc/include/asm/uaccess_32.h
index 12ebee2d97c7..bdb1447aa1bb 100644
--- a/arch/sparc/include/asm/uaccess_32.h
+++ b/arch/sparc/include/asm/uaccess_32.h
@@ -277,7 +277,6 @@ static inline unsigned long clear_user(void __user *addr, unsigned long n)
return n;
}
-__must_check long strlen_user(const char __user *str);
__must_check long strnlen_user(const char __user *str, long n);
#endif /* _ASM_UACCESS_H */
diff --git a/arch/sparc/include/asm/uaccess_64.h b/arch/sparc/include/asm/uaccess_64.h
index 6096d671aa63..113d84eaa15e 100644
--- a/arch/sparc/include/asm/uaccess_64.h
+++ b/arch/sparc/include/asm/uaccess_64.h
@@ -194,7 +194,6 @@ unsigned long __must_check __clear_user(void __user *, unsigned long);
#define clear_user __clear_user
-__must_check long strlen_user(const char __user *str);
__must_check long strnlen_user(const char __user *str, long n);
struct pt_regs;
diff --git a/arch/tile/include/asm/uaccess.h b/arch/tile/include/asm/uaccess.h
index a803f6bb4d92..d0c79c1c54b4 100644
--- a/arch/tile/include/asm/uaccess.h
+++ b/arch/tile/include/asm/uaccess.h
@@ -327,7 +327,6 @@ extern unsigned long raw_copy_in_user(
extern long strnlen_user(const char __user *str, long n);
-extern long strlen_user(const char __user *str);
extern long strncpy_from_user(char *dst, const char __user *src, long);
/**
diff --git a/arch/um/kernel/process.c b/arch/um/kernel/process.c
index a9bd61820042..2c7f721eccbc 100644
--- a/arch/um/kernel/process.c
+++ b/arch/um/kernel/process.c
@@ -255,11 +255,6 @@ int clear_user_proc(void __user *buf, int size)
return clear_user(buf, size);
}
-int strlen_user_proc(char __user *str)
-{
- return strlen_user(str);
-}
-
int cpu(void)
{
return current_thread_info()->cpu;
diff --git a/arch/x86/include/asm/uaccess.h b/arch/x86/include/asm/uaccess.h
index 68766b276d9e..ff5d391ba902 100644
--- a/arch/x86/include/asm/uaccess.h
+++ b/arch/x86/include/asm/uaccess.h
@@ -565,7 +565,6 @@ copy_from_user_nmi(void *to, const void __user *from, unsigned long n);
extern __must_check long
strncpy_from_user(char *dst, const char __user *src, long count);
-extern __must_check long strlen_user(const char __user *str);
extern __must_check long strnlen_user(const char __user *str, long n);
unsigned long __must_check clear_user(void __user *mem, unsigned long len);
diff --git a/arch/xtensa/include/asm/uaccess.h b/arch/xtensa/include/asm/uaccess.h
index 2e7bac0d4b2c..c0714b471ef4 100644
--- a/arch/xtensa/include/asm/uaccess.h
+++ b/arch/xtensa/include/asm/uaccess.h
@@ -288,9 +288,6 @@ strncpy_from_user(char *dst, const char *src, long count)
return -EFAULT;
}
-
-#define strlen_user(str) strnlen_user((str), TASK_SIZE - 1)
-
/*
* Return the size of a string (including the ending 0!)
*/
diff --git a/include/asm-generic/uaccess.h b/include/asm-generic/uaccess.h
index bbe4bb438e39..723e81a6c162 100644
--- a/include/asm-generic/uaccess.h
+++ b/include/asm-generic/uaccess.h
@@ -200,11 +200,6 @@ static inline long strnlen_user(const char __user *src, long n)
return __strnlen_user(src, n);
}
-static inline long strlen_user(const char __user *src)
-{
- return strnlen_user(src, 32767);
-}
-
/*
* Zero Userspace
*/
diff --git a/lib/strnlen_user.c b/lib/strnlen_user.c
index 8e105ed4df12..a5f567747ced 100644
--- a/lib/strnlen_user.c
+++ b/lib/strnlen_user.c
@@ -121,37 +121,3 @@ long strnlen_user(const char __user *str, long count)
return 0;
}
EXPORT_SYMBOL(strnlen_user);
-
-/**
- * strlen_user: - Get the size of a user string INCLUDING final NUL.
- * @str: The string to measure.
- *
- * Context: User context only. This function may sleep if pagefaults are
- * enabled.
- *
- * Get the size of a NUL-terminated string in user space.
- *
- * Returns the size of the string INCLUDING the terminating NUL.
- * On exception, returns 0.
- *
- * If there is a limit on the length of a valid string, you may wish to
- * consider using strnlen_user() instead.
- */
-long strlen_user(const char __user *str)
-{
- unsigned long max_addr, src_addr;
-
- max_addr = user_addr_max();
- src_addr = (unsigned long)str;
- if (likely(src_addr < max_addr)) {
- unsigned long max = max_addr - src_addr;
- long retval;
-
- user_access_begin();
- retval = do_strnlen_user(str, ~0ul, max);
- user_access_end();
- return retval;
- }
- return 0;
-}
-EXPORT_SYMBOL(strlen_user);