[PATCH] xtensa: remove verify_area macros

verify_area() is still alive on xtensa in 2.6.17-rc3-git13 It would be nice
to finally be rid of that function across the board.

Signed-off-by: Chris Zankel <chris@zankel.net>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

6 files changed, 13 insertions, 47 deletions

diff --git a/arch/xtensa/Kconfig b/arch/xtensa/Kconfig
index dbeb3504c3..848f173db2 100644
--- a/arch/xtensa/Kconfig
+++ b/arch/xtensa/Kconfig
@@ -34,10 +34,6 @@ config GENERIC_HARDIRQS
         bool
         default y
 
-config RWSEM_GENERIC_SPINLOCK
-       bool
-       default y
-
 source "init/Kconfig"
 
 menu "Processor type and features"
diff --git a/arch/xtensa/kernel/entry.S b/arch/xtensa/kernel/entry.S
index 5c018c503d..89e409e9e0 100644
--- a/arch/xtensa/kernel/entry.S
+++ b/arch/xtensa/kernel/entry.S
@@ -1102,7 +1102,7 @@ ENTRY(fast_syscall_sysxtensa)
         s32i    a7, a2, PT_AREG7
 
         movi    a7, 4                   # sizeof(unsigned int)
-        verify_area a3, a7, a0, a2, .Leac
+        access_ok a0, a3, a7, a2, .Leac
 
         _beqi   a6, SYSXTENSA_ATOMIC_SET, .Lset
         _beqi   a6, SYSXTENSA_ATOMIC_EXG_ADD, .Lexg
diff --git a/arch/xtensa/kernel/signal.c b/arch/xtensa/kernel/signal.c
index e252b61e45..beba497e78 100644
--- a/arch/xtensa/kernel/signal.c
+++ b/arch/xtensa/kernel/signal.c
@@ -104,7 +104,7 @@ sys_sigaction(int sig, const struct old_sigaction *act,
 
         if (act) {
                 old_sigset_t mask;
-                if (verify_area(VERIFY_READ, act, sizeof(*act)) ||
+                if (!access_ok(VERIFY_READ, act, sizeof(*act)) ||
                     __get_user(new_ka.sa.sa_handler, &act->sa_handler) ||
                     __get_user(new_ka.sa.sa_restorer, &act->sa_restorer))
                         return -EFAULT;
@@ -116,7 +116,7 @@ sys_sigaction(int sig, const struct old_sigaction *act,
         ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL);
 
         if (!ret && oact) {
-                if (verify_area(VERIFY_WRITE, oact, sizeof(*oact)) ||
+                if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) ||
                     __put_user(old_ka.sa.sa_handler, &oact->sa_handler) ||
                     __put_user(old_ka.sa.sa_restorer, &oact->sa_restorer))
                         return -EFAULT;
@@ -236,7 +236,7 @@ restore_sigcontext(struct pt_regs *regs, struct sigcontext *sc)
         err |= __copy_from_user (regs->areg, sc->sc_areg, XCHAL_NUM_AREGS*4);
         err |= __get_user(buf, &sc->sc_cpstate);
         if (buf) {
-                if (verify_area(VERIFY_READ, buf, sizeof(*buf)))
+                if (!access_ok(VERIFY_READ, buf, sizeof(*buf)))
                         goto badframe;
                 err |= restore_cpextra(buf);
         }
@@ -357,7 +357,7 @@ asmlinkage int sys_sigreturn(struct pt_regs *regs)
         if (regs->depc > 64)
                 panic ("Double exception sys_sigreturn\n");
 
-        if (verify_area(VERIFY_READ, frame, sizeof(*frame)))
+        if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
                 goto badframe;
 
         if (__get_user(set.sig[0], &frame->sc.oldmask)
@@ -394,7 +394,7 @@ asmlinkage int sys_rt_sigreturn(struct pt_regs *regs)
                 return 0;
         }
 
-        if (verify_area(VERIFY_READ, frame, sizeof(*frame)))
+        if (!access_ok(VERIFY_READ, frame, sizeof(*frame)))
                 goto badframe;
 
         if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set)))
diff --git a/include/asm-xtensa/checksum.h b/include/asm-xtensa/checksum.h
index bdc00ae9be..03114f8d1e 100644
--- a/include/asm-xtensa/checksum.h
+++ b/include/asm-xtensa/checksum.h
@@ -43,8 +43,7 @@ asmlinkage unsigned int csum_partial_copy_generic( const char *src, char *dst, i
  *      Note: when you get a NULL pointer exception here this means someone
  *      passed in an incorrect kernel address to one of these functions.
  *
- *      If you use these functions directly please don't forget the
- *      verify_area().
+ *      If you use these functions directly please don't forget the access_ok().
  */
 static inline
 unsigned int csum_partial_copy_nocheck ( const char *src, char *dst,
diff --git a/include/asm-xtensa/rwsem.h b/include/asm-xtensa/rwsem.h
index 3c02b0e033..abcd86dc5a 100644
--- a/include/asm-xtensa/rwsem.h
+++ b/include/asm-xtensa/rwsem.h
@@ -172,4 +172,9 @@ static inline int rwsem_atomic_update(int delta, struct rw_semaphore *sem)
         return atomic_add_return(delta, (atomic_t *)(&sem->count));
 }
 
-#endif  /* _XTENSA_RWSEM_XADD_H */
+static inline int rwsem_is_locked(struct rw_semaphore *sem)
+{
+        return (sem->count != 0);
+}
+
+#endif  /* _XTENSA_RWSEM_H */
diff --git a/include/asm-xtensa/uaccess.h b/include/asm-xtensa/uaccess.h
index 06a22b83ba..88a64e1144 100644
--- a/include/asm-xtensa/uaccess.h
+++ b/include/asm-xtensa/uaccess.h
@@ -154,35 +154,6 @@
 .Laccess_ok_\@:
         .endm
 
-/*
- * verify_area determines whether a memory access is allowed.  It's
- * mostly an unnecessary wrapper for access_ok, but we provide it as a
- * duplicate of the verify_area() C inline function below.  See the
- * equivalent C version below for clarity.
- *
- * On error, verify_area branches to a label indicated by parameter
- * <error>.  This implies that the macro falls through to the next
- * instruction on success.
- *
- * Note that we assume success is the common case, and we optimize the
- * branch fall-through case on success.
- *
- * On Entry:
- *      <aa>    register containing memory address
- *      <as>    register containing memory size
- *      <at>    temp register
- *      <error> label to branch to on error; implies fall-through
- *              macro on success
- * On Exit:
- *      <aa>    preserved
- *      <as>    preserved
- *      <at>    destroyed
- */
-        .macro  verify_area     aa, as, at, sp, error
-        access_ok  \at, \aa, \as, \sp, \error
-        .endm
-
-
 #else /* __ASSEMBLY__ not defined */
 
 #include <linux/sched.h>
@@ -211,11 +182,6 @@
 #define __access_ok(addr,size) (__kernel_ok || __user_ok((addr),(size)))
 #define access_ok(type,addr,size) __access_ok((unsigned long)(addr),(size))
 
-static inline int verify_area(int type, const void * addr, unsigned long size)
-{
-        return access_ok(type,addr,size) ? 0 : -EFAULT;
-}
-
 /*
  * These are the main single-value transfer routines.  They
  * automatically use the right size if we just have the right pointer