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pinkbyte-overlay/sys-kernel/spl/files/spl-0.6.0-kernel-3.2-compat.patch

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diff --git a/config/spl-build.m4 b/config/spl-build.m4
index 90ff680..27b2c42 100644
--- a/config/spl-build.m4
+++ b/config/spl-build.m4
@@ -85,6 +85,7 @@ AC_DEFUN([SPL_AC_CONFIG_KERNEL], [
SPL_AC_KERN_PATH_PARENT_SYMBOL
SPL_AC_2ARGS_ZLIB_DEFLATE_WORKSPACESIZE
SPL_AC_SHRINK_CONTROL_STRUCT
+ SPL_AC_RWSEM_SPINLOCK_IS_RAW
])
AC_DEFUN([SPL_AC_MODULE_SYMVERS], [
@@ -1973,3 +1974,29 @@ AC_DEFUN([SPL_AC_SHRINK_CONTROL_STRUCT], [
AC_MSG_RESULT(no)
])
])
+
+dnl #
+dnl # 3.1 API Change
+dnl #
+dnl # The rw_semaphore.wait_lock member was changed from spinlock_t to
+dnl # raw_spinlock_t at commit ddb6c9b58a19edcfac93ac670b066c836ff729f1.
+dnl #
+AC_DEFUN([SPL_AC_RWSEM_SPINLOCK_IS_RAW], [
+ AC_MSG_CHECKING([whether struct rw_semaphore member wait_lock is raw])
+ tmp_flags="$EXTRA_KCFLAGS"
+ EXTRA_KCFLAGS="-Werror"
+ SPL_LINUX_TRY_COMPILE([
+ #include <linux/rwsem.h>
+ ],[
+ struct rw_semaphore dummy_semaphore __attribute__ ((unused));
+ raw_spinlock_t dummy_lock __attribute__ ((unused));
+ dummy_semaphore.wait_lock = dummy_lock;
+ ],[
+ AC_MSG_RESULT(yes)
+ AC_DEFINE(RWSEM_SPINLOCK_IS_RAW, 1,
+ [struct rw_semaphore member wait_lock is raw_spinlock_t])
+ ],[
+ AC_MSG_RESULT(no)
+ ])
+ EXTRA_KCFLAGS="$tmp_flags"
+])
diff --git a/configure b/configure
index 9d95d76..621773d 100755
--- a/configure
+++ b/configure
@@ -16025,6 +16025,76 @@ fi
+
+ { $as_echo "$as_me:$LINENO: checking whether struct rw_semaphore member wait_lock is raw" >&5
+$as_echo_n "checking whether struct rw_semaphore member wait_lock is raw... " >&6; }
+ tmp_flags="$EXTRA_KCFLAGS"
+ EXTRA_KCFLAGS="-Werror"
+
+
+cat confdefs.h - <<_ACEOF >conftest.c
+/* confdefs.h. */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h. */
+
+
+ #include <linux/rwsem.h>
+
+int
+main (void)
+{
+
+ struct rw_semaphore dummy_semaphore __attribute__ ((unused));
+ raw_spinlock_t dummy_lock __attribute__ ((unused));
+ dummy_semaphore.wait_lock = dummy_lock;
+
+ ;
+ return 0;
+}
+
+_ACEOF
+
+
+ rm -Rf build && mkdir -p build
+ echo "obj-m := conftest.o" >build/Makefile
+ if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+ { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+ (eval $ac_try) 2>&5
+ ac_status=$?
+ $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+ (exit $ac_status); }; } >/dev/null && { ac_try='test -s build/conftest.o'
+ { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+ (eval $ac_try) 2>&5
+ ac_status=$?
+ $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+ (exit $ac_status); }; }; then
+
+ { $as_echo "$as_me:$LINENO: result: yes" >&5
+$as_echo "yes" >&6; }
+
+cat >>confdefs.h <<\_ACEOF
+#define RWSEM_SPINLOCK_IS_RAW 1
+_ACEOF
+
+
+else
+ $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+ { $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
+
+
+
+fi
+
+ rm -Rf build
+
+
+ EXTRA_KCFLAGS="$tmp_flags"
+
;;
user) ;;
all)
@@ -20335,6 +20405,76 @@ fi
+ { $as_echo "$as_me:$LINENO: checking whether struct rw_semaphore member wait_lock is raw" >&5
+$as_echo_n "checking whether struct rw_semaphore member wait_lock is raw... " >&6; }
+ tmp_flags="$EXTRA_KCFLAGS"
+ EXTRA_KCFLAGS="-Werror"
+
+
+cat confdefs.h - <<_ACEOF >conftest.c
+/* confdefs.h. */
+_ACEOF
+cat confdefs.h >>conftest.$ac_ext
+cat >>conftest.$ac_ext <<_ACEOF
+/* end confdefs.h. */
+
+
+ #include <linux/rwsem.h>
+
+int
+main (void)
+{
+
+ struct rw_semaphore dummy_semaphore __attribute__ ((unused));
+ raw_spinlock_t dummy_lock __attribute__ ((unused));
+ dummy_semaphore.wait_lock = dummy_lock;
+
+ ;
+ return 0;
+}
+
+_ACEOF
+
+
+ rm -Rf build && mkdir -p build
+ echo "obj-m := conftest.o" >build/Makefile
+ if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
+ { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+ (eval $ac_try) 2>&5
+ ac_status=$?
+ $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+ (exit $ac_status); }; } >/dev/null && { ac_try='test -s build/conftest.o'
+ { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
+ (eval $ac_try) 2>&5
+ ac_status=$?
+ $as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
+ (exit $ac_status); }; }; then
+
+ { $as_echo "$as_me:$LINENO: result: yes" >&5
+$as_echo "yes" >&6; }
+
+cat >>confdefs.h <<\_ACEOF
+#define RWSEM_SPINLOCK_IS_RAW 1
+_ACEOF
+
+
+else
+ $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+ { $as_echo "$as_me:$LINENO: result: no" >&5
+$as_echo "no" >&6; }
+
+
+
+fi
+
+ rm -Rf build
+
+
+ EXTRA_KCFLAGS="$tmp_flags"
+
+
;;
srpm) ;;
*)
diff --git a/include/linux/rwsem_compat.h b/include/linux/rwsem_compat.h
index 67a82bb..fe69f01 100644
--- a/include/linux/rwsem_compat.h
+++ b/include/linux/rwsem_compat.h
@@ -27,6 +27,26 @@
#include <linux/rwsem.h>
+#ifdef RWSEM_SPINLOCK_IS_RAW
+#define spl_rwsem_lock_irqsave(lock, flags) \
+({ \
+ raw_spin_lock_irqsave(lock, flags); \
+})
+#define spl_rwsem_unlock_irqrestore(lock, flags) \
+({ \
+ raw_spin_unlock_irqrestore(lock, flags); \
+})
+#else
+#define spl_rwsem_lock_irqsave(lock, flags) \
+({ \
+ spin_lock_irqsave(lock, flags); \
+})
+#define spl_rwsem_unlock_irqrestore(lock, flags) \
+({ \
+ spin_unlock_irqrestore(lock, flags); \
+})
+#endif /* RWSEM_SPINLOCK_IS_RAW */
+
#ifdef RWSEM_IS_LOCKED_TAKES_WAIT_LOCK
/*
* A race condition in rwsem_is_locked() was fixed in Linux 2.6.33 and the fix
@@ -48,14 +68,14 @@
#else
-#define spl_rwsem_is_locked(rwsem) \
-({ \
- unsigned long _flags_; \
- int _rc_; \
- spin_lock_irqsave(&rwsem->wait_lock, _flags_); \
- _rc_ = rwsem_is_locked(rwsem); \
- spin_unlock_irqrestore(&rwsem->wait_lock, _flags_); \
- _rc_; \
+#define spl_rwsem_is_locked(rwsem) \
+({ \
+ unsigned long _flags_; \
+ int _rc_; \
+ spl_rwsem_lock_irqsave(&rwsem->wait_lock, _flags_); \
+ _rc_ = rwsem_is_locked(rwsem); \
+ spl_rwsem_unlock_irqrestore(&rwsem->wait_lock, _flags_); \
+ _rc_; \
})
#endif /* RWSEM_IS_LOCKED_TAKES_WAIT_LOCK */
diff --git a/include/sys/rwlock.h b/include/sys/rwlock.h
index 3d98085..9d29ad6 100644
--- a/include/sys/rwlock.h
+++ b/include/sys/rwlock.h
@@ -52,9 +52,9 @@ spl_rw_set_owner(krwlock_t *rwp)
{
unsigned long flags;
- spin_lock_irqsave(&SEM(rwp)->wait_lock, flags);
+ spl_rwsem_lock_irqsave(&SEM(rwp)->wait_lock, flags);
rwp->rw_owner = current;
- spin_unlock_irqrestore(&SEM(rwp)->wait_lock, flags);
+ spl_rwsem_unlock_irqrestore(&SEM(rwp)->wait_lock, flags);
}
static inline void
@@ -62,9 +62,9 @@ spl_rw_clear_owner(krwlock_t *rwp)
{
unsigned long flags;
- spin_lock_irqsave(&SEM(rwp)->wait_lock, flags);
+ spl_rwsem_lock_irqsave(&SEM(rwp)->wait_lock, flags);
rwp->rw_owner = NULL;
- spin_unlock_irqrestore(&SEM(rwp)->wait_lock, flags);
+ spl_rwsem_unlock_irqrestore(&SEM(rwp)->wait_lock, flags);
}
static inline kthread_t *
@@ -73,9 +73,9 @@ rw_owner(krwlock_t *rwp)
unsigned long flags;
kthread_t *owner;
- spin_lock_irqsave(&SEM(rwp)->wait_lock, flags);
+ spl_rwsem_lock_irqsave(&SEM(rwp)->wait_lock, flags);
owner = rwp->rw_owner;
- spin_unlock_irqrestore(&SEM(rwp)->wait_lock, flags);
+ spl_rwsem_unlock_irqrestore(&SEM(rwp)->wait_lock, flags);
return owner;
}
@@ -187,14 +187,14 @@ extern int __down_write_trylock_locked(struct rw_semaphore *);
unsigned long _flags_; \
int _rc_ = 0; \
\
- spin_lock_irqsave(&SEM(rwp)->wait_lock, _flags_); \
+ spl_rwsem_lock_irqsave(&SEM(rwp)->wait_lock, _flags_); \
if ((list_empty(&SEM(rwp)->wait_list)) && \
(SEM(rwp)->activity == 1)) { \
__up_read_locked(SEM(rwp)); \
VERIFY(_rc_ = __down_write_trylock_locked(SEM(rwp))); \
(rwp)->rw_owner = current; \
} \
- spin_unlock_irqrestore(&SEM(rwp)->wait_lock, _flags_); \
+ spl_rwsem_unlock_irqrestore(&SEM(rwp)->wait_lock, _flags_); \
_rc_; \
})
#else
diff --git a/spl_config.h.in b/spl_config.h.in
index 94e28e7..847da21 100644
--- a/spl_config.h.in
+++ b/spl_config.h.in
@@ -271,6 +271,9 @@
/* rwsem_is_locked() acquires sem->wait_lock */
#undef RWSEM_IS_LOCKED_TAKES_WAIT_LOCK
+/* struct rw_semaphore member wait_lock is raw_spinlock_t */
+#undef RWSEM_SPINLOCK_IS_RAW
+
/* Define the project alias string. */
#undef SPL_META_ALIAS
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