[ARM] 3118/1: fix and reenable nwfpe extended precision emulation for big-endian

Patch from Lennert Buytenhek

nwfpe extended precision emulation used to be broken on big-endian
and was therefore disabled.  This patch fixes nwfpe so that it copies
extended precision floats to/from userspace in the proper word order
(similar to patch #2046, see the description of that patch for an
explanation) and reenables the Kconfig option.

Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

1 files changed, 10 insertions, 0 deletions

diff --git a/arch/arm/nwfpe/fpa11_cpdt.c b/arch/arm/nwfpe/fpa11_cpdt.c
index b0db5cbcc3b1..32859fa8dcfc 100644
--- a/arch/arm/nwfpe/fpa11_cpdt.c
+++ b/arch/arm/nwfpe/fpa11_cpdt.c
@@ -59,8 +59,13 @@ static inline void loadExtended(const unsigned int Fn, const unsigned int __user
         p = (unsigned int *) &fpa11->fpreg[Fn].fExtended;
         fpa11->fType[Fn] = typeExtended;
         get_user(p[0], &pMem[0]);       /* sign & exponent */
+#ifdef __ARMEB__
+        get_user(p[1], &pMem[1]);       /* ms bits */
+        get_user(p[2], &pMem[2]);       /* ls bits */
+#else
         get_user(p[1], &pMem[2]);       /* ls bits */
         get_user(p[2], &pMem[1]);       /* ms bits */
+#endif
 }
 #endif
 
@@ -177,8 +182,13 @@ static inline void storeExtended(const unsigned int Fn, unsigned int __user *pMe
         }
 
         put_user(val.i[0], &pMem[0]);   /* sign & exp */
+#ifdef __ARMEB__
+        put_user(val.i[1], &pMem[1]);   /* msw */
+        put_user(val.i[2], &pMem[2]);
+#else
         put_user(val.i[1], &pMem[2]);
         put_user(val.i[2], &pMem[1]);   /* msw */
+#endif
 }
 #endif