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authorLuiz Fernando N. Capitulino <lcapitulino@mandriva.com.br>2007-10-17 18:04:41 +0200
committerThomas Gleixner <tglx@inhelltoy.tec.linutronix.de>2007-10-17 20:17:05 +0200
commitde8aacbe6a3f3dd7104da09a5535232cd385fdd6 (patch)
tree89c6dc0070ab30b4e6ecaa6269bfd54320a400c7 /arch
parent32c464f5d9701db45bc1673288594e664065388e (diff)
downloadlinux-de8aacbe6a3f3dd7104da09a5535232cd385fdd6.tar.bz2
x86: convert mm_context_t semaphore to a mutex
convert mm_context_t semaphore to a mutex. Signed-off-by: Luiz Fernando N. Capitulino <lcapitulino@mandriva.com.br> Cc: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/kernel/i386_ksyms_32.c1
-rw-r--r--arch/x86/kernel/ldt_32.c14
-rw-r--r--arch/x86/kernel/ptrace_32.c4
-rw-r--r--arch/x86/mm/fault_32.c4
4 files changed, 12 insertions, 11 deletions
diff --git a/arch/x86/kernel/i386_ksyms_32.c b/arch/x86/kernel/i386_ksyms_32.c
index e3d4b73bfdb0..edd39ccf139e 100644
--- a/arch/x86/kernel/i386_ksyms_32.c
+++ b/arch/x86/kernel/i386_ksyms_32.c
@@ -1,4 +1,5 @@
#include <linux/module.h>
+#include <asm/semaphore.h>
#include <asm/checksum.h>
#include <asm/desc.h>
diff --git a/arch/x86/kernel/ldt_32.c b/arch/x86/kernel/ldt_32.c
index a8b18421863a..9ff90a27c45f 100644
--- a/arch/x86/kernel/ldt_32.c
+++ b/arch/x86/kernel/ldt_32.c
@@ -92,13 +92,13 @@ int init_new_context(struct task_struct *tsk, struct mm_struct *mm)
struct mm_struct * old_mm;
int retval = 0;
- init_MUTEX(&mm->context.sem);
+ mutex_init(&mm->context.lock);
mm->context.size = 0;
old_mm = current->mm;
if (old_mm && old_mm->context.size > 0) {
- down(&old_mm->context.sem);
+ mutex_lock(&old_mm->context.lock);
retval = copy_ldt(&mm->context, &old_mm->context);
- up(&old_mm->context.sem);
+ mutex_unlock(&old_mm->context.lock);
}
return retval;
}
@@ -130,7 +130,7 @@ static int read_ldt(void __user * ptr, unsigned long bytecount)
if (bytecount > LDT_ENTRY_SIZE*LDT_ENTRIES)
bytecount = LDT_ENTRY_SIZE*LDT_ENTRIES;
- down(&mm->context.sem);
+ mutex_lock(&mm->context.lock);
size = mm->context.size*LDT_ENTRY_SIZE;
if (size > bytecount)
size = bytecount;
@@ -138,7 +138,7 @@ static int read_ldt(void __user * ptr, unsigned long bytecount)
err = 0;
if (copy_to_user(ptr, mm->context.ldt, size))
err = -EFAULT;
- up(&mm->context.sem);
+ mutex_unlock(&mm->context.lock);
if (err < 0)
goto error_return;
if (size != bytecount) {
@@ -194,7 +194,7 @@ static int write_ldt(void __user * ptr, unsigned long bytecount, int oldmode)
goto out;
}
- down(&mm->context.sem);
+ mutex_lock(&mm->context.lock);
if (ldt_info.entry_number >= mm->context.size) {
error = alloc_ldt(&current->mm->context, ldt_info.entry_number+1, 1);
if (error < 0)
@@ -221,7 +221,7 @@ install:
error = 0;
out_unlock:
- up(&mm->context.sem);
+ mutex_unlock(&mm->context.lock);
out:
return error;
}
diff --git a/arch/x86/kernel/ptrace_32.c b/arch/x86/kernel/ptrace_32.c
index 8622b9cd3e38..99102ec5fade 100644
--- a/arch/x86/kernel/ptrace_32.c
+++ b/arch/x86/kernel/ptrace_32.c
@@ -165,7 +165,7 @@ static unsigned long convert_eip_to_linear(struct task_struct *child, struct pt_
seg &= ~7UL;
- down(&child->mm->context.sem);
+ mutex_lock(&child->mm->context.lock);
if (unlikely((seg >> 3) >= child->mm->context.size))
addr = -1L; /* bogus selector, access would fault */
else {
@@ -179,7 +179,7 @@ static unsigned long convert_eip_to_linear(struct task_struct *child, struct pt_
addr &= 0xffff;
addr += base;
}
- up(&child->mm->context.sem);
+ mutex_unlock(&child->mm->context.lock);
}
return addr;
}
diff --git a/arch/x86/mm/fault_32.c b/arch/x86/mm/fault_32.c
index d84314ce22bb..6555c3d14371 100644
--- a/arch/x86/mm/fault_32.c
+++ b/arch/x86/mm/fault_32.c
@@ -105,7 +105,7 @@ static inline unsigned long get_segment_eip(struct pt_regs *regs,
LDT and other horrors are only used in user space. */
if (seg & (1<<2)) {
/* Must lock the LDT while reading it. */
- down(&current->mm->context.sem);
+ mutex_lock(&current->mm->context.lock);
desc = current->mm->context.ldt;
desc = (void *)desc + (seg & ~7);
} else {
@@ -118,7 +118,7 @@ static inline unsigned long get_segment_eip(struct pt_regs *regs,
base = get_desc_base((unsigned long *)desc);
if (seg & (1<<2)) {
- up(&current->mm->context.sem);
+ mutex_unlock(&current->mm->context.lock);
} else
put_cpu();