diff options
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); |
