/*
* Copyright (C) International Business Machines Corp., 2000-2004
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
* the GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef _H_JFS_BTREE
#define _H_JFS_BTREE
/*
* jfs_btree.h: B+-tree
*
* JFS B+-tree (dtree and xtree) common definitions
*/
/*
* basic btree page - btpage
*
struct btpage {
s64 next; right sibling bn
s64 prev; left sibling bn
u8 flag;
u8 rsrvd[7]; type specific
s64 self; self address
u8 entry[4064];
}; */
/* btpaget_t flag */
#define BT_TYPE 0x07 /* B+-tree index */
#define BT_ROOT 0x01 /* root page */
#define BT_LEAF 0x02 /* leaf page */
#define BT_INTERNAL 0x04 /* internal page */
#define BT_RIGHTMOST 0x10 /* rightmost page */
#define BT_LEFTMOST 0x20 /* leftmost page */
#define BT_SWAPPED 0x80 /* used by fsck for endian swapping */
/* btorder (in inode) */
#define BT_RANDOM 0x0000
#define BT_SEQUENTIAL 0x0001
#define BT_LOOKUP 0x0010
#define BT_INSERT 0x0020
#define BT_DELETE 0x0040
/*
* btree page buffer cache access
*/
#define BT_IS_ROOT(MP) (((MP)->xflag & COMMIT_PAGE) == 0)
/* get page from buffer page */
#define BT_PAGE(IP, MP, TYPE, ROOT)\
(BT_IS_ROOT(MP) ? (TYPE *)&JFS_IP(IP)->ROOT : (TYPE *)(MP)->data)
/* get the page buffer and the page for specified block address */
#define BT_GETPAGE(IP, BN, MP, TYPE, SIZE, P, RC, ROOT)\
{\
if ((BN) == 0)\
{\
MP = (struct metapage *)&JFS_IP(IP)->bxflag;\
P = (TYPE *)&JFS_IP(IP)->ROOT;\
RC = 0;\
}\
else\
{\
MP = read_metapage((IP), BN, SIZE, 1);\
if (MP) {\
RC = 0;\
P = (MP)->data;\
} else {\
P = NULL;\
jfs_err("bread failed!");\
RC = -EIO;\
}\
}\
}
#define BT_MARK_DIRTY(MP, IP)\
{\
if (BT_IS_ROOT(MP))\
mark_inode_dirty(IP);\
else\
mark_metapage_dirty(MP);\
}
/* put the page buffer */
#define BT_PUTPAGE(MP)\
{\
if (! BT_IS_ROOT(MP)) \
release_metapage(MP); \
}
/*
* btree traversal stack
*
* record the path traversed during the search;
* top frame record the leaf page/entry selected.
*/
struct btframe { /* stack frame */
s64 bn; /* 8: */
s16 index; /* 2: */
s16 lastindex; /* 2: unused */
struct metapage *mp; /* 4/8: */
}; /* (16/24) */
struct btstack {
struct btframe *top;
int nsplit;
struct btframe stack[MAXTREEHEIGHT];
};
#define BT_CLR(btstack)\
(btstack)->top = (btstack)->stack
#define BT_STACK_FULL(btstack)\
( (btstack)->top == &((btstack)->stack[MAXTREEHEIGHT-1]))
#define BT_PUSH(BTSTACK, BN, INDEX)\
{\
assert(!BT_STACK_FULL(BTSTACK));\
(BTSTACK)->top->bn = BN;\
(BTSTACK)->top->index = INDEX;\
++(BTSTACK)->top;\
}
#define BT_POP(btstack)\
( (btstack)->top == (btstack)->stack ? NULL : --(btstack)->top )
#define BT_STACK(btstack)\
( (btstack)->top == (btstack)->stack ? NULL : (btstack)->top )
static inline void BT_STACK_DUMP(struct btstack *btstack)
{
int i;
printk("btstack dump:\n");
for (i = 0; i < MAXTREEHEIGHT; i++)
printk(KERN_ERR "bn = %Lx, index = %d\n",
(long long)btstack->stack[i].bn,
btstack->stack[i].index);
}
/* retrieve search results */
#define BT_GETSEARCH(IP, LEAF, BN, MP, TYPE, P, INDEX, ROOT)\
{\
BN = (LEAF)->bn;\
MP = (LEAF)->mp;\
if (BN)\
P = (TYPE *)MP->data;\
else\
P = (TYPE *)&JFS_IP(IP)->ROOT;\
INDEX = (LEAF)->index;\
}
/* put the page buffer of search */
#define BT_PUTSEARCH(BTSTACK)\
{\
if (! BT_IS_ROOT((BTSTACK)->top->mp))\
release_metapage((BTSTACK)->top->mp);\
}
#endif /* _H_JFS_BTREE */
alue='40'>40
irqdomain: Avoid activating interrupts more than once
Since commit f3b0946d629c ("genirq/msi: Make sure PCI MSIs are
activated early"), we can end-up activating a PCI/MSI twice (once
at allocation time, and once at startup time).
This is normally of no consequences, except that there is some
HW out there that may misbehave if activate is used more than once
(the GICv3 ITS, for example, uses the activate callback
to issue the MAPVI command, and the architecture spec says that
"If there is an existing mapping for the EventID-DeviceID
combination, behavior is UNPREDICTABLE").
While this could be worked around in each individual driver, it may
make more sense to tackle the issue at the core level. In order to
avoid getting in that situation, let's have a per-interrupt flag
to remember if we have already activated that interrupt or not.
Fixes: f3b0946d629c ("genirq/msi: Make sure PCI MSIs are activated early")
Reported-and-tested-by: Andre Przywara <andre.przywara@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Cc: stable@vger.kernel.org
Link: http://lkml.kernel.org/r/1484668848-24361-1-git-send-email-marc.zyngier@arm.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'include/net/irda/irias_object.h')