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uml: LDT mutex conversion

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The ldt.semaphore conforms to the new struct mutex requirments, so I converted
it to use the new API and changed the name.

Signed-off-by: Daniel Walker <dwalker@mvista.com>
Signed-off-by: Jeff Dike <jdike@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Daniel Walker 2008-02-04 22:31:26 -08:00 committed by Linus Torvalds
parent 2278c5ac9d
commit 01ac835fdd
2 changed files with 9 additions and 9 deletions
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14
arch/um/sys-i386/ldt.c
View file

@ -147,7 +147,7 @@ static int read_ldt(void __user * ptr, unsigned long bytecount)
if (ptrace_ldt)
return read_ldt_from_host(ptr, bytecount);
down(&ldt->semaphore);
mutex_lock(&ldt->lock);
if (ldt->entry_count <= LDT_DIRECT_ENTRIES) {
size = LDT_ENTRY_SIZE*LDT_DIRECT_ENTRIES;
if (size > bytecount)
@ -171,7 +171,7 @@ static int read_ldt(void __user * ptr, unsigned long bytecount)
ptr += size;
}
}
up(&ldt->semaphore);
mutex_unlock(&ldt->lock);
if (bytecount == 0 || err == -EFAULT)
goto out;
@ -229,7 +229,7 @@ static int write_ldt(void __user * ptr, unsigned long bytecount, int func)
}
if (!ptrace_ldt)
down(&ldt->semaphore);
mutex_lock(&ldt->lock);
err = write_ldt_entry(mm_idp, func, &ldt_info, &addr, 1);
if (err)
@ -289,7 +289,7 @@ static int write_ldt(void __user * ptr, unsigned long bytecount, int func)
err = 0;
out_unlock:
up(&ldt->semaphore);
mutex_unlock(&ldt->lock);
out:
return err;
}
@ -396,7 +396,7 @@ long init_new_ldt(struct mm_context *new_mm, struct mm_context *from_mm)
if (!ptrace_ldt)
init_MUTEX(&new_mm->ldt.semaphore);
mutex_init(&new_mm->ldt.lock);
if (!from_mm) {
memset(&desc, 0, sizeof(desc));
@ -456,7 +456,7 @@ long init_new_ldt(struct mm_context *new_mm, struct mm_context *from_mm)
* i.e., we have to use the stub for modify_ldt, which
* can't handle the big read buffer of up to 64kB.
*/
down(&from_mm->ldt.semaphore);
mutex_lock(&from_mm->ldt.lock);
if (from_mm->ldt.entry_count <= LDT_DIRECT_ENTRIES)
memcpy(new_mm->ldt.u.entries, from_mm->ldt.u.entries,
sizeof(new_mm->ldt.u.entries));
@ -475,7 +475,7 @@ long init_new_ldt(struct mm_context *new_mm, struct mm_context *from_mm)
}
}
new_mm->ldt.entry_count = from_mm->ldt.entry_count;
up(&from_mm->ldt.semaphore);
mutex_unlock(&from_mm->ldt.lock);
}
out:

4
include/asm-um/ldt.h
View file

@ -8,7 +8,7 @@
#ifndef __ASM_LDT_H
#define __ASM_LDT_H
#include "asm/semaphore.h"
#include <linux/mutex.h>
#include "asm/host_ldt.h"
extern void ldt_host_info(void);
@ -27,7 +27,7 @@ struct ldt_entry {
typedef struct uml_ldt {
int entry_count;
struct semaphore semaphore;
struct mutex lock;
union {
struct ldt_entry * pages[LDT_PAGES_MAX];
struct ldt_entry entries[LDT_DIRECT_ENTRIES];