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-rw-r--r--include/asm-sh/bugs.h2
-rw-r--r--include/asm-sh/cpu-sh4/freq.h6
-rw-r--r--include/asm-sh/cpu-sh4/rtc.h5
-rw-r--r--include/asm-sh/migor.h58
-rw-r--r--include/asm-sh/processor.h5
-rw-r--r--include/asm-sh/r7780rp.h22
-rw-r--r--include/asm-sh/se7721.h70
-rw-r--r--include/asm-sh/se7722.h2
-rw-r--r--include/asm-sh/sh_keysc.h13
-rw-r--r--include/asm-sh/system.h2
-rw-r--r--include/asm-sh/uaccess_32.h5
-rw-r--r--include/linux/file.h1
-rw-r--r--include/linux/fs.h52
-rw-r--r--include/linux/list.h48
-rw-r--r--include/linux/mount.h11
15 files changed, 248 insertions, 54 deletions
diff --git a/include/asm-sh/bugs.h b/include/asm-sh/bugs.h
index cfda7d5bf026..121b2ecddfc3 100644
--- a/include/asm-sh/bugs.h
+++ b/include/asm-sh/bugs.h
@@ -25,7 +25,7 @@ static void __init check_bugs(void)
case CPU_SH7619:
*p++ = '2';
break;
- case CPU_SH7203 ... CPU_SH7263:
+ case CPU_SH7203 ... CPU_MXG:
*p++ = '2';
*p++ = 'a';
break;
diff --git a/include/asm-sh/cpu-sh4/freq.h b/include/asm-sh/cpu-sh4/freq.h
index ec028c649215..da46e67ae26d 100644
--- a/include/asm-sh/cpu-sh4/freq.h
+++ b/include/asm-sh/cpu-sh4/freq.h
@@ -10,14 +10,14 @@
#ifndef __ASM_CPU_SH4_FREQ_H
#define __ASM_CPU_SH4_FREQ_H
-#if defined(CONFIG_CPU_SUBTYPE_SH7722) || defined(CONFIG_CPU_SUBTYPE_SH7366)
+#if defined(CONFIG_CPU_SUBTYPE_SH7722) || \
+ defined(CONFIG_CPU_SUBTYPE_SH7723) || \
+ defined(CONFIG_CPU_SUBTYPE_SH7366)
#define FRQCR 0xa4150000
#define VCLKCR 0xa4150004
#define SCLKACR 0xa4150008
#define SCLKBCR 0xa415000c
-#if defined(CONFIG_CPU_SUBTYPE_SH7722)
#define IrDACLKCR 0xa4150010
-#endif
#elif defined(CONFIG_CPU_SUBTYPE_SH7763) || \
defined(CONFIG_CPU_SUBTYPE_SH7780)
#define FRQCR 0xffc80000
diff --git a/include/asm-sh/cpu-sh4/rtc.h b/include/asm-sh/cpu-sh4/rtc.h
index f3d0f53275e4..25b1e6adfe8c 100644
--- a/include/asm-sh/cpu-sh4/rtc.h
+++ b/include/asm-sh/cpu-sh4/rtc.h
@@ -1,7 +1,12 @@
#ifndef __ASM_SH_CPU_SH4_RTC_H
#define __ASM_SH_CPU_SH4_RTC_H
+#ifdef CONFIG_CPU_SUBTYPE_SH7723
+#define rtc_reg_size sizeof(u16)
+#else
#define rtc_reg_size sizeof(u32)
+#endif
+
#define RTC_BIT_INVERTED 0x40 /* bug on SH7750, SH7750S */
#define RTC_DEF_CAPABILITIES RTC_CAP_4_DIGIT_YEAR
diff --git a/include/asm-sh/migor.h b/include/asm-sh/migor.h
new file mode 100644
index 000000000000..2329363afdc3
--- /dev/null
+++ b/include/asm-sh/migor.h
@@ -0,0 +1,58 @@
+#ifndef __ASM_SH_MIGOR_H
+#define __ASM_SH_MIGOR_H
+
+/*
+ * linux/include/asm-sh/migor.h
+ *
+ * Copyright (C) 2008 Renesas Solutions
+ *
+ * Portions Copyright (C) 2007 Nobuhiro Iwamatsu
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ */
+#include <asm/addrspace.h>
+
+/* GPIO */
+#define MSTPCR0 0xa4150030
+#define MSTPCR1 0xa4150034
+#define MSTPCR2 0xa4150038
+
+#define PORT_PACR 0xa4050100
+#define PORT_PDCR 0xa4050106
+#define PORT_PECR 0xa4050108
+#define PORT_PHCR 0xa405010e
+#define PORT_PJCR 0xa4050110
+#define PORT_PKCR 0xa4050112
+#define PORT_PLCR 0xa4050114
+#define PORT_PMCR 0xa4050116
+#define PORT_PRCR 0xa405011c
+#define PORT_PWCR 0xa4050146
+#define PORT_PXCR 0xa4050148
+#define PORT_PYCR 0xa405014a
+#define PORT_PZCR 0xa405014c
+#define PORT_PADR 0xa4050120
+#define PORT_PWDR 0xa4050166
+
+#define PORT_HIZCRA 0xa4050158
+#define PORT_HIZCRC 0xa405015c
+
+#define PORT_MSELCRB 0xa4050182
+
+#define MSTPCR1 0xa4150034
+#define MSTPCR2 0xa4150038
+
+#define PORT_PSELA 0xa405014e
+#define PORT_PSELB 0xa4050150
+#define PORT_PSELC 0xa4050152
+#define PORT_PSELD 0xa4050154
+
+#define PORT_HIZCRA 0xa4050158
+#define PORT_HIZCRB 0xa405015a
+#define PORT_HIZCRC 0xa405015c
+
+#define BSC_CS6ABCR 0xfec1001c
+
+#endif /* __ASM_SH_MIGOR_H */
diff --git a/include/asm-sh/processor.h b/include/asm-sh/processor.h
index ec707b98e5b9..b7c7ce80f03e 100644
--- a/include/asm-sh/processor.h
+++ b/include/asm-sh/processor.h
@@ -16,7 +16,7 @@ enum cpu_type {
CPU_SH7619,
/* SH-2A types */
- CPU_SH7203, CPU_SH7206, CPU_SH7263,
+ CPU_SH7203, CPU_SH7206, CPU_SH7263, CPU_MXG,
/* SH-3 types */
CPU_SH7705, CPU_SH7706, CPU_SH7707,
@@ -29,7 +29,8 @@ enum cpu_type {
CPU_SH7760, CPU_SH4_202, CPU_SH4_501,
/* SH-4A types */
- CPU_SH7763, CPU_SH7770, CPU_SH7780, CPU_SH7781, CPU_SH7785, CPU_SHX3,
+ CPU_SH7763, CPU_SH7770, CPU_SH7780, CPU_SH7781, CPU_SH7785,
+ CPU_SH7723, CPU_SHX3,
/* SH4AL-DSP types */
CPU_SH7343, CPU_SH7722, CPU_SH7366,
diff --git a/include/asm-sh/r7780rp.h b/include/asm-sh/r7780rp.h
index 1770460a4616..a33838f23a6d 100644
--- a/include/asm-sh/r7780rp.h
+++ b/include/asm-sh/r7780rp.h
@@ -55,11 +55,11 @@
#define PA_SCSPTR1 (PA_BCR+0x0524) /* SCIF1 Serial Port control */
#define PA_SCLSR1 (PA_BCR+0x0528) /* SCIF1 Line Status control */
#define PA_SCRER1 (PA_BCR+0x052c) /* SCIF1 Serial Error control */
-#define PA_ICCR (PA_BCR+0x0600) /* Serial control */
-#define PA_SAR (PA_BCR+0x0602) /* Serial Slave control */
-#define PA_MDR (PA_BCR+0x0604) /* Serial Mode control */
-#define PA_ADR1 (PA_BCR+0x0606) /* Serial Address1 control */
-#define PA_DAR1 (PA_BCR+0x0646) /* Serial Data1 control */
+#define PA_SMCR (PA_BCR+0x0600) /* 2-wire Serial control */
+#define PA_SMSMADR (PA_BCR+0x0602) /* 2-wire Serial Slave control */
+#define PA_SMMR (PA_BCR+0x0604) /* 2-wire Serial Mode control */
+#define PA_SMSADR1 (PA_BCR+0x0606) /* 2-wire Serial Address1 control */
+#define PA_SMTRDR1 (PA_BCR+0x0646) /* 2-wire Serial Data1 control */
#define PA_VERREG (PA_BCR+0x0700) /* FPGA Version Register */
#define PA_POFF (PA_BCR+0x0800) /* System Power Off control */
#define PA_PMR (PA_BCR+0x0900) /* */
@@ -107,11 +107,11 @@
#define PA_SCFCR (PA_BCR+0x040c) /* SCIF FIFO control */
#define PA_SCFDR (PA_BCR+0x040e) /* SCIF FIFO data control */
#define PA_SCLSR (PA_BCR+0x0412) /* SCIF Line Status control */
-#define PA_ICCR (PA_BCR+0x0500) /* Serial control */
-#define PA_SAR (PA_BCR+0x0502) /* Serial Slave control */
-#define PA_MDR (PA_BCR+0x0504) /* Serial Mode control */
-#define PA_ADR1 (PA_BCR+0x0506) /* Serial Address1 control */
-#define PA_DAR1 (PA_BCR+0x0546) /* Serial Data1 control */
+#define PA_SMCR (PA_BCR+0x0500) /* 2-wire Serial control */
+#define PA_SMSMADR (PA_BCR+0x0502) /* 2-wire Serial Slave control */
+#define PA_SMMR (PA_BCR+0x0504) /* 2-wire Serial Mode control */
+#define PA_SMSADR1 (PA_BCR+0x0506) /* 2-wire Serial Address1 control */
+#define PA_SMTRDR1 (PA_BCR+0x0546) /* 2-wire Serial Data1 control */
#define PA_VERREG (PA_BCR+0x0600) /* FPGA Version Register */
#define PA_AX88796L 0xa5800400 /* AX88796L Area */
@@ -190,6 +190,8 @@
#define IRQ_TP (HL_FPGA_IRQ_BASE + 12)
#define IRQ_RTC (HL_FPGA_IRQ_BASE + 13)
#define IRQ_TH_ALERT (HL_FPGA_IRQ_BASE + 14)
+#define IRQ_SCIF0 (HL_FPGA_IRQ_BASE + 15)
+#define IRQ_SCIF1 (HL_FPGA_IRQ_BASE + 16)
unsigned char *highlander_init_irq_r7780mp(void);
unsigned char *highlander_init_irq_r7780rp(void);
diff --git a/include/asm-sh/se7721.h b/include/asm-sh/se7721.h
new file mode 100644
index 000000000000..b957f6041193
--- /dev/null
+++ b/include/asm-sh/se7721.h
@@ -0,0 +1,70 @@
+/*
+ * Copyright (C) 2008 Renesas Solutions Corp.
+ *
+ * Hitachi UL SolutionEngine 7721 Support.
+ *
+ * This file is subject to the terms and conditions of the GNU General Public
+ * License. See the file "COPYING" in the main directory of this archive
+ * for more details.
+ *
+ */
+
+#ifndef __ASM_SH_SE7721_H
+#define __ASM_SH_SE7721_H
+#include <asm/addrspace.h>
+
+/* Box specific addresses. */
+#define SE_AREA0_WIDTH 2 /* Area0: 32bit */
+#define PA_ROM 0xa0000000 /* EPROM */
+#define PA_ROM_SIZE 0x00200000 /* EPROM size 2M byte */
+#define PA_FROM 0xa1000000 /* Flash-ROM */
+#define PA_FROM_SIZE 0x01000000 /* Flash-ROM size 16M byte */
+#define PA_EXT1 0xa4000000
+#define PA_EXT1_SIZE 0x04000000
+#define PA_SDRAM 0xaC000000 /* SDRAM(Area3) 64MB */
+#define PA_SDRAM_SIZE 0x04000000
+
+#define PA_EXT4 0xb0000000
+#define PA_EXT4_SIZE 0x04000000
+
+#define PA_PERIPHERAL 0xB8000000
+
+#define PA_PCIC PA_PERIPHERAL
+#define PA_MRSHPC (PA_PERIPHERAL + 0x003fffe0)
+#define PA_MRSHPC_MW1 (PA_PERIPHERAL + 0x00400000)
+#define PA_MRSHPC_MW2 (PA_PERIPHERAL + 0x00500000)
+#define PA_MRSHPC_IO (PA_PERIPHERAL + 0x00600000)
+#define MRSHPC_OPTION (PA_MRSHPC + 6)
+#define MRSHPC_CSR (PA_MRSHPC + 8)
+#define MRSHPC_ISR (PA_MRSHPC + 10)
+#define MRSHPC_ICR (PA_MRSHPC + 12)
+#define MRSHPC_CPWCR (PA_MRSHPC + 14)
+#define MRSHPC_MW0CR1 (PA_MRSHPC + 16)
+#define MRSHPC_MW1CR1 (PA_MRSHPC + 18)
+#define MRSHPC_IOWCR1 (PA_MRSHPC + 20)
+#define MRSHPC_MW0CR2 (PA_MRSHPC + 22)
+#define MRSHPC_MW1CR2 (PA_MRSHPC + 24)
+#define MRSHPC_IOWCR2 (PA_MRSHPC + 26)
+#define MRSHPC_CDCR (PA_MRSHPC + 28)
+#define MRSHPC_PCIC_INFO (PA_MRSHPC + 30)
+
+#define PA_LED 0xB6800000 /* 8bit LED */
+#define PA_FPGA 0xB7000000 /* FPGA base address */
+
+#define MRSHPC_IRQ0 10
+
+#define FPGA_ILSR1 (PA_FPGA + 0x02)
+#define FPGA_ILSR2 (PA_FPGA + 0x03)
+#define FPGA_ILSR3 (PA_FPGA + 0x04)
+#define FPGA_ILSR4 (PA_FPGA + 0x05)
+#define FPGA_ILSR5 (PA_FPGA + 0x06)
+#define FPGA_ILSR6 (PA_FPGA + 0x07)
+#define FPGA_ILSR7 (PA_FPGA + 0x08)
+#define FPGA_ILSR8 (PA_FPGA + 0x09)
+
+void init_se7721_IRQ(void);
+
+#define __IO_PREFIX se7721
+#include <asm/io_generic.h>
+
+#endif /* __ASM_SH_SE7721_H */
diff --git a/include/asm-sh/se7722.h b/include/asm-sh/se7722.h
index e0e89fcb8388..3690fe5857a4 100644
--- a/include/asm-sh/se7722.h
+++ b/include/asm-sh/se7722.h
@@ -77,6 +77,8 @@
#define PORT_PSELA 0xA405014EUL
#define PORT_PYCR 0xA405014AUL
#define PORT_PZCR 0xA405014CUL
+#define PORT_HIZCRA 0xA4050158UL
+#define PORT_HIZCRC 0xA405015CUL
/* IRQ */
#define IRQ0_IRQ 32
diff --git a/include/asm-sh/sh_keysc.h b/include/asm-sh/sh_keysc.h
new file mode 100644
index 000000000000..b5a4dd5a9729
--- /dev/null
+++ b/include/asm-sh/sh_keysc.h
@@ -0,0 +1,13 @@
+#ifndef __ASM_KEYSC_H__
+#define __ASM_KEYSC_H__
+
+#define SH_KEYSC_MAXKEYS 30
+
+struct sh_keysc_info {
+ enum { SH_KEYSC_MODE_1, SH_KEYSC_MODE_2, SH_KEYSC_MODE_3 } mode;
+ int scan_timing; /* 0 -> 7, see KYCR1, SCN[2:0] */
+ int delay;
+ int keycodes[SH_KEYSC_MAXKEYS];
+};
+
+#endif /* __ASM_KEYSC_H__ */
diff --git a/include/asm-sh/system.h b/include/asm-sh/system.h
index 5145aa2a0ce9..e65b6b822cb3 100644
--- a/include/asm-sh/system.h
+++ b/include/asm-sh/system.h
@@ -146,6 +146,8 @@ extern unsigned int instruction_size(unsigned int insn);
extern unsigned long cached_to_uncached;
+extern struct dentry *sh_debugfs_root;
+
/* XXX
* disable hlt during certain critical i/o operations
*/
diff --git a/include/asm-sh/uaccess_32.h b/include/asm-sh/uaccess_32.h
index c0318b608893..1e41fda74bd3 100644
--- a/include/asm-sh/uaccess_32.h
+++ b/include/asm-sh/uaccess_32.h
@@ -55,13 +55,10 @@ static inline void set_fs(mm_segment_t s)
* If we don't have an MMU (or if its disabled) the only thing we really have
* to look out for is if the address resides somewhere outside of what
* available RAM we have.
- *
- * TODO: This check could probably also stand to be restricted somewhat more..
- * though it still does the Right Thing(tm) for the time being.
*/
static inline int __access_ok(unsigned long addr, unsigned long size)
{
- return ((addr >= memory_start) && ((addr + size) < memory_end));
+ return 1;
}
#else /* CONFIG_MMU */
#define __addr_ok(addr) \
diff --git a/include/linux/file.h b/include/linux/file.h
index 7239baac81a9..653477021e4c 100644
--- a/include/linux/file.h
+++ b/include/linux/file.h
@@ -61,6 +61,7 @@ extern struct kmem_cache *filp_cachep;
extern void __fput(struct file *);
extern void fput(struct file *);
+extern void drop_file_write_access(struct file *file);
struct file_operations;
struct vfsmount;
diff --git a/include/linux/fs.h b/include/linux/fs.h
index b84b848431f2..d1eeea669d2c 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -776,6 +776,9 @@ static inline int ra_has_index(struct file_ra_state *ra, pgoff_t index)
index < ra->start + ra->size);
}
+#define FILE_MNT_WRITE_TAKEN 1
+#define FILE_MNT_WRITE_RELEASED 2
+
struct file {
/*
* fu_list becomes invalid after file_free is called and queued via
@@ -810,6 +813,9 @@ struct file {
spinlock_t f_ep_lock;
#endif /* #ifdef CONFIG_EPOLL */
struct address_space *f_mapping;
+#ifdef CONFIG_DEBUG_WRITECOUNT
+ unsigned long f_mnt_write_state;
+#endif
};
extern spinlock_t files_lock;
#define file_list_lock() spin_lock(&files_lock);
@@ -818,6 +824,49 @@ extern spinlock_t files_lock;
#define get_file(x) atomic_inc(&(x)->f_count)
#define file_count(x) atomic_read(&(x)->f_count)
+#ifdef CONFIG_DEBUG_WRITECOUNT
+static inline void file_take_write(struct file *f)
+{
+ WARN_ON(f->f_mnt_write_state != 0);
+ f->f_mnt_write_state = FILE_MNT_WRITE_TAKEN;
+}
+static inline void file_release_write(struct file *f)
+{
+ f->f_mnt_write_state |= FILE_MNT_WRITE_RELEASED;
+}
+static inline void file_reset_write(struct file *f)
+{
+ f->f_mnt_write_state = 0;
+}
+static inline void file_check_state(struct file *f)
+{
+ /*
+ * At this point, either both or neither of these bits
+ * should be set.
+ */
+ WARN_ON(f->f_mnt_write_state == FILE_MNT_WRITE_TAKEN);
+ WARN_ON(f->f_mnt_write_state == FILE_MNT_WRITE_RELEASED);
+}
+static inline int file_check_writeable(struct file *f)
+{
+ if (f->f_mnt_write_state == FILE_MNT_WRITE_TAKEN)
+ return 0;
+ printk(KERN_WARNING "writeable file with no "
+ "mnt_want_write()\n");
+ WARN_ON(1);
+ return -EINVAL;
+}
+#else /* !CONFIG_DEBUG_WRITECOUNT */
+static inline void file_take_write(struct file *filp) {}
+static inline void file_release_write(struct file *filp) {}
+static inline void file_reset_write(struct file *filp) {}
+static inline void file_check_state(struct file *filp) {}
+static inline int file_check_writeable(struct file *filp)
+{
+ return 0;
+}
+#endif /* CONFIG_DEBUG_WRITECOUNT */
+
#define MAX_NON_LFS ((1UL<<31) - 1)
/* Page cache limit. The filesystems should put that into their s_maxbytes
@@ -1735,7 +1784,8 @@ extern struct file *create_read_pipe(struct file *f);
extern struct file *create_write_pipe(void);
extern void free_write_pipe(struct file *);
-extern int open_namei(int dfd, const char *, int, int, struct nameidata *);
+extern struct file *do_filp_open(int dfd, const char *pathname,
+ int open_flag, int mode);
extern int may_open(struct nameidata *, int, int);
extern int kernel_read(struct file *, unsigned long, char *, unsigned long);
diff --git a/include/linux/list.h b/include/linux/list.h
index 75ce2cb4ff6e..dac16f99c701 100644
--- a/include/linux/list.h
+++ b/include/linux/list.h
@@ -631,31 +631,14 @@ static inline void list_splice_init_rcu(struct list_head *list,
* as long as the traversal is guarded by rcu_read_lock().
*/
#define list_for_each_rcu(pos, head) \
- for (pos = (head)->next; \
- prefetch(rcu_dereference(pos)->next), pos != (head); \
- pos = pos->next)
+ for (pos = rcu_dereference((head)->next); \
+ prefetch(pos->next), pos != (head); \
+ pos = rcu_dereference(pos->next))
#define __list_for_each_rcu(pos, head) \
- for (pos = (head)->next; \
- rcu_dereference(pos) != (head); \
- pos = pos->next)
-
-/**
- * list_for_each_safe_rcu
- * @pos: the &struct list_head to use as a loop cursor.
- * @n: another &struct list_head to use as temporary storage
- * @head: the head for your list.
- *
- * Iterate over an rcu-protected list, safe against removal of list entry.
- *
- * This list-traversal primitive may safely run concurrently with
- * the _rcu list-mutation primitives such as list_add_rcu()
- * as long as the traversal is guarded by rcu_read_lock().
- */
-#define list_for_each_safe_rcu(pos, n, head) \
- for (pos = (head)->next; \
- n = rcu_dereference(pos)->next, pos != (head); \
- pos = n)
+ for (pos = rcu_dereference((head)->next); \
+ pos != (head); \
+ pos = rcu_dereference(pos->next))
/**
* list_for_each_entry_rcu - iterate over rcu list of given type
@@ -668,10 +651,9 @@ static inline void list_splice_init_rcu(struct list_head *list,
* as long as the traversal is guarded by rcu_read_lock().
*/
#define list_for_each_entry_rcu(pos, head, member) \
- for (pos = list_entry((head)->next, typeof(*pos), member); \
- prefetch(rcu_dereference(pos)->member.next), \
- &pos->member != (head); \
- pos = list_entry(pos->member.next, typeof(*pos), member))
+ for (pos = list_entry(rcu_dereference((head)->next), typeof(*pos), member); \
+ prefetch(pos->member.next), &pos->member != (head); \
+ pos = list_entry(rcu_dereference(pos->member.next), typeof(*pos), member))
/**
@@ -686,9 +668,9 @@ static inline void list_splice_init_rcu(struct list_head *list,
* as long as the traversal is guarded by rcu_read_lock().
*/
#define list_for_each_continue_rcu(pos, head) \
- for ((pos) = (pos)->next; \
- prefetch(rcu_dereference((pos))->next), (pos) != (head); \
- (pos) = (pos)->next)
+ for ((pos) = rcu_dereference((pos)->next); \
+ prefetch((pos)->next), (pos) != (head); \
+ (pos) = rcu_dereference((pos)->next))
/*
* Double linked lists with a single pointer list head.
@@ -986,10 +968,10 @@ static inline void hlist_add_after_rcu(struct hlist_node *prev,
* as long as the traversal is guarded by rcu_read_lock().
*/
#define hlist_for_each_entry_rcu(tpos, pos, head, member) \
- for (pos = (head)->first; \
- rcu_dereference(pos) && ({ prefetch(pos->next); 1;}) && \
+ for (pos = rcu_dereference((head)->first); \
+ pos && ({ prefetch(pos->next); 1;}) && \
({ tpos = hlist_entry(pos, typeof(*tpos), member); 1;}); \
- pos = pos->next)
+ pos = rcu_dereference(pos->next))
#else
#warning "don't include kernel headers in userspace"
diff --git a/include/linux/mount.h b/include/linux/mount.h
index 5ee2df217cdf..d6600e3f7e45 100644
--- a/include/linux/mount.h
+++ b/include/linux/mount.h
@@ -14,6 +14,7 @@
#include <linux/types.h>
#include <linux/list.h>
+#include <linux/nodemask.h>
#include <linux/spinlock.h>
#include <asm/atomic.h>
@@ -28,8 +29,10 @@ struct mnt_namespace;
#define MNT_NOATIME 0x08
#define MNT_NODIRATIME 0x10
#define MNT_RELATIME 0x20
+#define MNT_READONLY 0x40 /* does the user want this to be r/o? */
#define MNT_SHRINKABLE 0x100
+#define MNT_IMBALANCED_WRITE_COUNT 0x200 /* just for debugging */
#define MNT_SHARED 0x1000 /* if the vfsmount is a shared mount */
#define MNT_UNBINDABLE 0x2000 /* if the vfsmount is a unbindable mount */
@@ -62,6 +65,11 @@ struct vfsmount {
int mnt_expiry_mark; /* true if marked for expiry */
int mnt_pinned;
int mnt_ghosts;
+ /*
+ * This value is not stable unless all of the mnt_writers[] spinlocks
+ * are held, and all mnt_writer[]s on this mount have 0 as their ->count
+ */
+ atomic_t __mnt_writers;
};
static inline struct vfsmount *mntget(struct vfsmount *mnt)
@@ -71,9 +79,12 @@ static inline struct vfsmount *mntget(struct vfsmount *mnt)
return mnt;
}
+extern int mnt_want_write(struct vfsmount *mnt);
+extern void mnt_drop_write(struct vfsmount *mnt);
extern void mntput_no_expire(struct vfsmount *mnt);
extern void mnt_pin(struct vfsmount *mnt);
extern void mnt_unpin(struct vfsmount *mnt);
+extern int __mnt_is_readonly(struct vfsmount *mnt);
static inline void mntput(struct vfsmount *mnt)
{
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-29 19:45:07 +0000