parisc: Drop strnlen_user() in favour of generic version

As suggested by Arnd Bergmann, drop the parisc version of
strnlen_user() and switch to the generic version.

Suggested-by: Arnd Bergmann <arnd@kernel.org>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Helge Deller <deller@gmx.de>

diff --git a/arch/parisc/Kconfig b/arch/parisc/Kconfig
index 3001a7d..86e8796 100644 (file)
--- a/arch/parisc/Kconfig
+++ b/arch/parisc/Kconfig
@@ -10,7 +10,6 @@ config PARISC
        select ARCH_HAS_ELF_RANDOMIZE
        select ARCH_HAS_STRICT_KERNEL_RWX
        select ARCH_HAS_UBSAN_SANITIZE_ALL
-       select ARCH_HAS_STRNLEN_USER
        select ARCH_NO_SG_CHAIN
        select ARCH_SUPPORTS_HUGETLBFS if PA20
        select ARCH_SUPPORTS_MEMORY_FAILURE

diff --git a/arch/parisc/include/asm/uaccess.h b/arch/parisc/include/asm/uaccess.h
index 7c13314..cfb4ca7 100644 (file)
--- a/arch/parisc/include/asm/uaccess.h
+++ b/arch/parisc/include/asm/uaccess.h
@@ -201,13 +201,12 @@ struct exception_table_entry {
 
 extern long strncpy_from_user(char *, const char __user *, long);
 extern unsigned lclear_user(void __user *, unsigned long);
-extern long lstrnlen_user(const char __user *, long);
+extern __must_check long strnlen_user(const char __user *src, long n);
 /*
  * Complex access routines -- macros
  */
 #define user_addr_max() (~0UL)
 
-#define strnlen_user lstrnlen_user
 #define clear_user lclear_user
 #define __clear_user lclear_user
 

diff --git a/arch/parisc/kernel/parisc_ksyms.c b/arch/parisc/kernel/parisc_ksyms.c
index e8a6a75..00297e8 100644 (file)
--- a/arch/parisc/kernel/parisc_ksyms.c
+++ b/arch/parisc/kernel/parisc_ksyms.c
@@ -32,7 +32,6 @@ EXPORT_SYMBOL(__xchg64);
 
 #include <linux/uaccess.h>
 EXPORT_SYMBOL(lclear_user);
-EXPORT_SYMBOL(lstrnlen_user);
 
 #ifndef CONFIG_64BIT
 /* Needed so insmod can set dp value */

diff --git a/arch/parisc/lib/lusercopy.S b/arch/parisc/lib/lusercopy.S
index 36d6a86..0aad5ce 100644 (file)
--- a/arch/parisc/lib/lusercopy.S
+++ b/arch/parisc/lib/lusercopy.S
@@ -67,40 +67,6 @@ $lclu_done:
 ENDPROC_CFI(lclear_user)
 
 
-       /*
-        * long lstrnlen_user(char *s, long n)
-        *
-        * Returns 0 if exception before zero byte or reaching N,
-        *         N+1 if N would be exceeded,
-        *         else strlen + 1 (i.e. includes zero byte).
-        */
-
-ENTRY_CFI(lstrnlen_user)
-       comib,=     0,%r25,$lslen_nzero
-       copy        %r26,%r24
-       get_sr
-1:      ldbs,ma     1(%sr1,%r26),%r1
-$lslen_loop:
-       comib,=,n   0,%r1,$lslen_done
-       addib,<>    -1,%r25,$lslen_loop
-2:      ldbs,ma     1(%sr1,%r26),%r1
-$lslen_done:
-       bv          %r0(%r2)
-       sub         %r26,%r24,%r28
-
-$lslen_nzero:
-       b           $lslen_done
-       ldo         1(%r26),%r26 /* special case for N == 0 */
-
-3:      b          $lslen_done
-       copy        %r24,%r26    /* reset r26 so 0 is returned on fault */
-
-       ASM_EXCEPTIONTABLE_ENTRY(1b,3b)
-       ASM_EXCEPTIONTABLE_ENTRY(2b,3b)
-
-ENDPROC_CFI(lstrnlen_user)
-
-
 /*
  * unsigned long pa_memcpy(void *dstp, const void *srcp, unsigned long len)
  *