[XFS] Keep stack usage down for 4k stacks by using noinline.

gcc-4.1 and more recent aggressively inline static functions which
increases XFS stack usage by ~15% in critical paths. Prevent this from
occurring by adding noinline to the STATIC definition.

Also uninline some functions that are too large to be inlined and were
causing problems with CONFIG_FORCED_INLINING=y.

Finally, clean up all the different users of inline, __inline and
__inline__ and put them under one STATIC_INLINE macro. For debug kernels
the STATIC_INLINE macro uninlines those functions.

SGI-PV: 957159
SGI-Modid: xfs-linux-melb:xfs-kern:27585a
Signed-off-by: NDavid Chinner <dgc@sgi.com>
Signed-off-by: NDavid Chatterton <chatz@sgi.com>
Signed-off-by: NTim Shimmin <tes@sgi.com>

fs/xfs/linux-2.6/xfs_aops.c

@@ -249,7 +249,7 @@ xfs_map_blocks(
 	return -error;
 }
 
-STATIC inline int
+STATIC_INLINE int
 xfs_iomap_valid(
 	xfs_iomap_t		*iomapp,
 	loff_t			offset)

fs/xfs/linux-2.6/xfs_buf.c

@@ -34,13 +34,13 @@
 #include <linux/backing-dev.h>
 #include <linux/freezer.h>
 
-STATIC kmem_zone_t *xfs_buf_zone;
-STATIC kmem_shaker_t xfs_buf_shake;
+static kmem_zone_t *xfs_buf_zone;
+static kmem_shaker_t xfs_buf_shake;
 STATIC int xfsbufd(void *);
 STATIC int xfsbufd_wakeup(int, gfp_t);
 STATIC void xfs_buf_delwri_queue(xfs_buf_t *, int);
 
-STATIC struct workqueue_struct *xfslogd_workqueue;
+static struct workqueue_struct *xfslogd_workqueue;
 struct workqueue_struct *xfsdatad_workqueue;
 
 #ifdef XFS_BUF_TRACE
@@ -139,7 +139,7 @@ page_region_mask(
 	return mask;
 }
 
-STATIC inline void
+STATIC_INLINE void
 set_page_region(
 	struct page	*page,
 	size_t		offset,
@@ -151,7 +151,7 @@ set_page_region(
 		SetPageUptodate(page);
 }
 
-STATIC inline int
+STATIC_INLINE int
 test_page_region(
 	struct page	*page,
 	size_t		offset,
@@ -171,9 +171,9 @@ typedef struct a_list {
 	struct a_list	*next;
 } a_list_t;
 
-STATIC a_list_t		*as_free_head;
-STATIC int		as_list_len;
-STATIC DEFINE_SPINLOCK(as_lock);
+static a_list_t		*as_free_head;
+static int		as_list_len;
+static DEFINE_SPINLOCK(as_lock);
 
 /*
  *	Try to batch vunmaps because they are costly.
@@ -1085,7 +1085,7 @@ xfs_buf_iostart(
 	return status;
 }
 
-STATIC __inline__ int
+STATIC_INLINE int
 _xfs_buf_iolocked(
 	xfs_buf_t		*bp)
 {
@@ -1095,7 +1095,7 @@ _xfs_buf_iolocked(
 	return 0;
 }
 
-STATIC __inline__ void
+STATIC_INLINE void
 _xfs_buf_ioend(
 	xfs_buf_t		*bp,
 	int			schedule)
@@ -1426,8 +1426,8 @@ xfs_free_bufhash(
 /*
  *	buftarg list for delwrite queue processing
  */
-STATIC LIST_HEAD(xfs_buftarg_list);
-STATIC DEFINE_SPINLOCK(xfs_buftarg_lock);
+LIST_HEAD(xfs_buftarg_list);
+static DEFINE_SPINLOCK(xfs_buftarg_lock);
 
 STATIC void
 xfs_register_buftarg(

fs/xfs/linux-2.6/xfs_export.c

@@ -24,7 +24,7 @@
 #include "xfs_mount.h"
 #include "xfs_export.h"
 
-STATIC struct dentry dotdot = { .d_name.name = "..", .d_name.len = 2, };
+static struct dentry dotdot = { .d_name.name = "..", .d_name.len = 2, };
 
 /*
  * XFS encodes and decodes the fileid portion of NFS filehandles

fs/xfs/linux-2.6/xfs_file.c

@@ -46,7 +46,7 @@ static struct vm_operations_struct xfs_file_vm_ops;
 static struct vm_operations_struct xfs_dmapi_file_vm_ops;
 #endif
 
-STATIC inline ssize_t
+STATIC_INLINE ssize_t
 __xfs_file_read(
 	struct kiocb		*iocb,
 	const struct iovec	*iov,
@@ -84,7 +84,7 @@ xfs_file_aio_read_invis(
 	return __xfs_file_read(iocb, iov, nr_segs, IO_ISAIO|IO_INVIS, pos);
 }
 
-STATIC inline ssize_t
+STATIC_INLINE ssize_t
 __xfs_file_write(
 	struct kiocb		*iocb,
 	const struct iovec	*iov,

fs/xfs/linux-2.6/xfs_iops.c

@@ -250,13 +250,13 @@ xfs_init_security(
  *
  * XXX(hch):  nfsd is broken, better fix it instead.
  */
-STATIC inline int
+STATIC_INLINE int
 xfs_has_fs_struct(struct task_struct *task)
 {
 	return (task->fs != init_task.fs);
 }
 
-STATIC inline void
+STATIC void
 xfs_cleanup_inode(
 	bhv_vnode_t	*dvp,
 	bhv_vnode_t	*vp,

fs/xfs/linux-2.6/xfs_super.c

@@ -58,10 +58,10 @@
 #include <linux/kthread.h>
 #include <linux/freezer.h>
 
-STATIC struct quotactl_ops xfs_quotactl_operations;
-STATIC struct super_operations xfs_super_operations;
-STATIC kmem_zone_t *xfs_vnode_zone;
-STATIC kmem_zone_t *xfs_ioend_zone;
+static struct quotactl_ops xfs_quotactl_operations;
+static struct super_operations xfs_super_operations;
+static kmem_zone_t *xfs_vnode_zone;
+static kmem_zone_t *xfs_ioend_zone;
 mempool_t *xfs_ioend_pool;
 
 STATIC struct xfs_mount_args *
@@ -121,7 +121,7 @@ xfs_max_file_offset(
 	return (((__uint64_t)pagefactor) << bitshift) - 1;
 }
 
-STATIC __inline__ void
+STATIC_INLINE void
 xfs_set_inodeops(
 	struct inode		*inode)
 {
@@ -147,7 +147,7 @@ xfs_set_inodeops(
 	}
 }
 
-STATIC __inline__ void
+STATIC_INLINE void
 xfs_revalidate_inode(
 	xfs_mount_t		*mp,
 	bhv_vnode_t		*vp,
@@ -873,7 +873,7 @@ xfs_fs_get_sb(
 			   mnt);
 }
 
-STATIC struct super_operations xfs_super_operations = {
+static struct super_operations xfs_super_operations = {
 	.alloc_inode		= xfs_fs_alloc_inode,
 	.destroy_inode		= xfs_fs_destroy_inode,
 	.write_inode		= xfs_fs_write_inode,
@@ -887,7 +887,7 @@ STATIC struct super_operations xfs_super_operations = {
 	.show_options		= xfs_fs_show_options,
 };
 
-STATIC struct quotactl_ops xfs_quotactl_operations = {
+static struct quotactl_ops xfs_quotactl_operations = {
 	.quota_sync		= xfs_fs_quotasync,
 	.get_xstate		= xfs_fs_getxstate,
 	.set_xstate		= xfs_fs_setxstate,

fs/xfs/linux-2.6/xfs_sysctl.c

@@ -54,7 +54,7 @@ xfs_stats_clear_proc_handler(
 }
 #endif /* CONFIG_PROC_FS */
 
-STATIC ctl_table xfs_table[] = {
+static ctl_table xfs_table[] = {
 	{XFS_RESTRICT_CHOWN, "restrict_chown", &xfs_params.restrict_chown.val,
 	sizeof(int), 0644, NULL, &proc_dointvec_minmax,
 	&sysctl_intvec, NULL,
@@ -136,12 +136,12 @@ STATIC ctl_table xfs_table[] = {
 	{0}
 };
 
-STATIC ctl_table xfs_dir_table[] = {
+static ctl_table xfs_dir_table[] = {
 	{FS_XFS, "xfs", NULL, 0, 0555, xfs_table},
 	{0}
 };
 
-STATIC ctl_table xfs_root_table[] = {
+static ctl_table xfs_root_table[] = {
 	{CTL_FS, "fs",  NULL, 0, 0555, xfs_dir_table},
 	{0}
 };

fs/xfs/linux-2.6/xfs_vnode.c

@@ -26,7 +26,7 @@ DEFINE_SPINLOCK(vnumber_lock);
  */
 #define NVSYNC                  37
 #define vptosync(v)             (&vsync[((unsigned long)v) % NVSYNC])
-STATIC wait_queue_head_t vsync[NVSYNC];
+static wait_queue_head_t vsync[NVSYNC];
 
 void
 vn_init(void)

fs/xfs/linux-2.6/xfs_vnode.h

@@ -489,14 +489,14 @@ static inline struct bhv_vnode *vn_grab(struct bhv_vnode *vp)
 #define VN_LOCK(vp)		mutex_spinlock(&(vp)->v_lock)
 #define VN_UNLOCK(vp, s)	mutex_spinunlock(&(vp)->v_lock, s)
 
-static __inline__ void vn_flagset(struct bhv_vnode *vp, uint flag)
+STATIC_INLINE void vn_flagset(struct bhv_vnode *vp, uint flag)
 {
 	spin_lock(&vp->v_lock);
 	vp->v_flag |= flag;
 	spin_unlock(&vp->v_lock);
 }
 
-static __inline__ uint vn_flagclr(struct bhv_vnode *vp, uint flag)
+STATIC_INLINE uint vn_flagclr(struct bhv_vnode *vp, uint flag)
 {
 	uint	cleared;
 

fs/xfs/quota/xfs_dquot_item.c

@@ -399,7 +399,7 @@ xfs_qm_dquot_logitem_committing(
 /*
  * This is the ops vector for dquots
  */
-STATIC struct xfs_item_ops xfs_dquot_item_ops = {
+static struct xfs_item_ops xfs_dquot_item_ops = {
 	.iop_size	= (uint(*)(xfs_log_item_t*))xfs_qm_dquot_logitem_size,
 	.iop_format	= (void(*)(xfs_log_item_t*, xfs_log_iovec_t*))
 					xfs_qm_dquot_logitem_format,
@@ -606,7 +606,7 @@ xfs_qm_qoffend_logitem_committing(xfs_qoff_logitem_t *qip, xfs_lsn_t commit_lsn)
 	return;
 }
 
-STATIC struct xfs_item_ops xfs_qm_qoffend_logitem_ops = {
+static struct xfs_item_ops xfs_qm_qoffend_logitem_ops = {
 	.iop_size	= (uint(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_size,
 	.iop_format	= (void(*)(xfs_log_item_t*, xfs_log_iovec_t*))
 					xfs_qm_qoff_logitem_format,
@@ -628,7 +628,7 @@ STATIC struct xfs_item_ops xfs_qm_qoffend_logitem_ops = {
 /*
  * This is the ops vector shared by all quotaoff-start log items.
  */
-STATIC struct xfs_item_ops xfs_qm_qoff_logitem_ops = {
+static struct xfs_item_ops xfs_qm_qoff_logitem_ops = {
 	.iop_size	= (uint(*)(xfs_log_item_t*))xfs_qm_qoff_logitem_size,
 	.iop_format	= (void(*)(xfs_log_item_t*, xfs_log_iovec_t*))
 					xfs_qm_qoff_logitem_format,

fs/xfs/quota/xfs_qm.c

@@ -64,10 +64,10 @@ uint		ndquot;
 
 kmem_zone_t	*qm_dqzone;
 kmem_zone_t	*qm_dqtrxzone;
-STATIC kmem_shaker_t	xfs_qm_shaker;
+static kmem_shaker_t	xfs_qm_shaker;
 
-STATIC cred_t	xfs_zerocr;
-STATIC xfs_inode_t	xfs_zeroino;
+static cred_t	xfs_zerocr;
+static xfs_inode_t	xfs_zeroino;
 
 STATIC void	xfs_qm_list_init(xfs_dqlist_t *, char *, int);
 STATIC void	xfs_qm_list_destroy(xfs_dqlist_t *);

fs/xfs/quota/xfs_qm_bhv.c

@@ -384,7 +384,7 @@ xfs_qm_dqrele_null(
 }
 
 
-STATIC struct xfs_qmops xfs_qmcore_xfs = {
+static struct xfs_qmops xfs_qmcore_xfs = {
 	.xfs_qminit		= xfs_qm_newmount,
 	.xfs_qmdone		= xfs_qm_unmount_quotadestroy,
 	.xfs_qmmount		= xfs_qm_endmount,

fs/xfs/support/debug.h

@@ -38,13 +38,37 @@ extern void assfail(char *expr, char *f, int l);
 
 #ifndef DEBUG
 # define ASSERT(expr)	((void)0)
-#else
+
+#ifndef STATIC
+# define STATIC static noinline
+#endif
+
+#ifndef STATIC_INLINE
+# define STATIC_INLINE static inline
+#endif
+
+#else /* DEBUG */
+
 # define ASSERT(expr)	ASSERT_ALWAYS(expr)
 extern unsigned long random(void);
-#endif
 
 #ifndef STATIC
-# define STATIC static
+# define STATIC noinline
 #endif
 
+/*
+ * We stop inlining of inline functions in debug mode.
+ * Unfortunately, this means static inline in header files
+ * get multiple definitions, so they need to remain static.
+ * This then gives tonnes of warnings about unused but defined
+ * functions, so we need to add the unused attribute to prevent
+ * these spurious warnings.
+ */
+#ifndef STATIC_INLINE
+# define STATIC_INLINE static __attribute__ ((unused)) noinline
+#endif
+
+#endif /* DEBUG */
+
+
 #endif  /* __XFS_SUPPORT_DEBUG_H__ */

fs/xfs/xfs_attr.c

@@ -57,9 +57,9 @@
  */
 
 #define ATTR_SYSCOUNT	2
-STATIC struct attrnames posix_acl_access;
-STATIC struct attrnames posix_acl_default;
-STATIC struct attrnames *attr_system_names[ATTR_SYSCOUNT];
+static struct attrnames posix_acl_access;
+static struct attrnames posix_acl_default;
+static struct attrnames *attr_system_names[ATTR_SYSCOUNT];
 
 /*========================================================================
  * Function prototypes for the kernel.
@@ -2477,7 +2477,7 @@ posix_acl_default_exists(
 	return xfs_acl_vhasacl_default(vp);
 }
 
-STATIC struct attrnames posix_acl_access = {
+static struct attrnames posix_acl_access = {
 	.attr_name	= "posix_acl_access",
 	.attr_namelen	= sizeof("posix_acl_access") - 1,
 	.attr_get	= posix_acl_access_get,
@@ -2486,7 +2486,7 @@ STATIC struct attrnames posix_acl_access = {
 	.attr_exists	= posix_acl_access_exists,
 };
 
-STATIC struct attrnames posix_acl_default = {
+static struct attrnames posix_acl_default = {
 	.attr_name	= "posix_acl_default",
 	.attr_namelen	= sizeof("posix_acl_default") - 1,
 	.attr_get	= posix_acl_default_get,
@@ -2495,7 +2495,7 @@ STATIC struct attrnames posix_acl_default = {
 	.attr_exists	= posix_acl_default_exists,
 };
 
-STATIC struct attrnames *attr_system_names[] =
+static struct attrnames *attr_system_names[] =
 	{ &posix_acl_access, &posix_acl_default };
 
 

fs/xfs/xfs_attr_leaf.c

@@ -94,7 +94,7 @@ STATIC int xfs_attr_leaf_entsize(xfs_attr_leafblock_t *leaf, int index);
  * Namespace helper routines
  *========================================================================*/
 
-STATIC inline attrnames_t *
+STATIC_INLINE attrnames_t *
 xfs_attr_flags_namesp(int flags)
 {
 	return ((flags & XFS_ATTR_SECURE) ? &attr_secure:
@@ -105,7 +105,7 @@ xfs_attr_flags_namesp(int flags)
  * If namespace bits don't match return 0.
  * If all match then return 1.
  */
-STATIC inline int
+STATIC_INLINE int
 xfs_attr_namesp_match(int arg_flags, int ondisk_flags)
 {
 	return XFS_ATTR_NSP_ONDISK(ondisk_flags) == XFS_ATTR_NSP_ARGS_TO_ONDISK(arg_flags);
@@ -116,7 +116,7 @@ xfs_attr_namesp_match(int arg_flags, int ondisk_flags)
  * then return 0.
  * If all match or are overridable then return 1.
  */
-STATIC inline int
+STATIC_INLINE int
 xfs_attr_namesp_match_overrides(int arg_flags, int ondisk_flags)
 {
 	if (((arg_flags & ATTR_SECURE) == 0) !=

fs/xfs/xfs_bit.c

@@ -29,7 +29,7 @@
 /*
  * Index of high bit number in byte, -1 for none set, 0..7 otherwise.
  */
-STATIC const char xfs_highbit[256] = {
+static const char xfs_highbit[256] = {
        -1, 0, 1, 1, 2, 2, 2, 2,			/* 00 .. 07 */
 	3, 3, 3, 3, 3, 3, 3, 3,			/* 08 .. 0f */
 	4, 4, 4, 4, 4, 4, 4, 4,			/* 10 .. 17 */

fs/xfs/xfs_bmap_btree.c

@@ -1862,7 +1862,7 @@ xfs_bmbt_delete(
  * xfs_bmbt_get_startblock, xfs_bmbt_get_blockcount and xfs_bmbt_get_state.
  */
 
-STATIC __inline__ void
+STATIC_INLINE void
 __xfs_bmbt_get_all(
 		__uint64_t l0,
 		__uint64_t l1,

fs/xfs/xfs_buf_item.c

@@ -660,7 +660,7 @@ xfs_buf_item_committing(xfs_buf_log_item_t *bip, xfs_lsn_t commit_lsn)
 /*
  * This is the ops vector shared by all buf log items.
  */
-STATIC struct xfs_item_ops xfs_buf_item_ops = {
+static struct xfs_item_ops xfs_buf_item_ops = {
 	.iop_size	= (uint(*)(xfs_log_item_t*))xfs_buf_item_size,
 	.iop_format	= (void(*)(xfs_log_item_t*, xfs_log_iovec_t*))
 					xfs_buf_item_format,

fs/xfs/xfs_extfree_item.c

@@ -227,7 +227,7 @@ xfs_efi_item_committing(xfs_efi_log_item_t *efip, xfs_lsn_t lsn)
 /*
  * This is the ops vector shared by all efi log items.
  */
-STATIC struct xfs_item_ops xfs_efi_item_ops = {
+static struct xfs_item_ops xfs_efi_item_ops = {
 	.iop_size	= (uint(*)(xfs_log_item_t*))xfs_efi_item_size,
 	.iop_format	= (void(*)(xfs_log_item_t*, xfs_log_iovec_t*))
 					xfs_efi_item_format,
@@ -525,7 +525,7 @@ xfs_efd_item_committing(xfs_efd_log_item_t *efip, xfs_lsn_t lsn)
 /*
  * This is the ops vector shared by all efd log items.
  */
-STATIC struct xfs_item_ops xfs_efd_item_ops = {
+static struct xfs_item_ops xfs_efd_item_ops = {
 	.iop_size	= (uint(*)(xfs_log_item_t*))xfs_efd_item_size,
 	.iop_format	= (void(*)(xfs_log_item_t*, xfs_log_iovec_t*))
 					xfs_efd_item_format,

fs/xfs/xfs_ialloc.c

@@ -342,7 +342,7 @@ xfs_ialloc_ag_alloc(
 	return 0;
 }
 
-STATIC __inline xfs_agnumber_t
+STATIC_INLINE xfs_agnumber_t
 xfs_ialloc_next_ag(
 	xfs_mount_t	*mp)
 {

fs/xfs/xfs_inode.c

@@ -2125,7 +2125,7 @@ xfs_iunlink_remove(
 	return 0;
 }
 
-static __inline__ int xfs_inode_clean(xfs_inode_t *ip)
+STATIC_INLINE int xfs_inode_clean(xfs_inode_t *ip)
 {
 	return (((ip->i_itemp == NULL) ||
 		!(ip->i_itemp->ili_format.ilf_fields & XFS_ILOG_ALL)) &&

fs/xfs/xfs_inode_item.c

@@ -887,7 +887,7 @@ xfs_inode_item_committing(
 /*
  * This is the ops vector shared by all buf log items.
  */
-STATIC struct xfs_item_ops xfs_inode_item_ops = {
+static struct xfs_item_ops xfs_inode_item_ops = {
 	.iop_size	= (uint(*)(xfs_log_item_t*))xfs_inode_item_size,
 	.iop_format	= (void(*)(xfs_log_item_t*, xfs_log_iovec_t*))
 					xfs_inode_item_format,

fs/xfs/xfs_mount.c

@@ -1802,7 +1802,7 @@ xfs_icsb_destroy_counters(
 	}
 }
 
-STATIC inline void
+STATIC_INLINE void
 xfs_icsb_lock_cntr(
 	xfs_icsb_cnts_t	*icsbp)
 {
@@ -1811,7 +1811,7 @@ xfs_icsb_lock_cntr(
 	}
 }
 
-STATIC inline void
+STATIC_INLINE void
 xfs_icsb_unlock_cntr(
 	xfs_icsb_cnts_t	*icsbp)
 {
@@ -1819,7 +1819,7 @@ xfs_icsb_unlock_cntr(
 }
 
 
-STATIC inline void
+STATIC_INLINE void
 xfs_icsb_lock_all_counters(
 	xfs_mount_t	*mp)
 {
@@ -1832,7 +1832,7 @@ xfs_icsb_lock_all_counters(
 	}
 }
 
-STATIC inline void
+STATIC_INLINE void
 xfs_icsb_unlock_all_counters(
 	xfs_mount_t	*mp)
 {