The patch titled
pci: remove unneeded lock_kernel() in drivers/pci/syscall.c.
has been removed from the -mm tree. Its filename was
pci-remove-unneeded-lock_kernel-in-drivers-pci-syscallc.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
Subject: pci: remove unneeded lock_kernel() in drivers/pci/syscall.c.
From: Diego Woitasen <diego@xxxxxxxxxxxxxxx>
sys_pciconfig_{read,write}() are protected against PCI removal with the
reference count in struct pci_dev. The concurrency of
pci_user_{read,write}_config_* functions are already protected by pci_lock
in drivers/pci/access.c.
Signed-off-by: Diego Woitasen <diego@xxxxxxxxxxxxxxx>
Cc: Greg KH <greg@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
drivers/pci/syscall.c | 5 -----
1 file changed, 5 deletions(-)
diff -puN drivers/pci/syscall.c~pci-remove-unneeded-lock_kernel-in-drivers-pci-syscallc drivers/pci/syscall.c
--- a/drivers/pci/syscall.c~pci-remove-unneeded-lock_kernel-in-drivers-pci-syscallc
+++ a/drivers/pci/syscall.c
@@ -34,7 +34,6 @@ sys_pciconfig_read(unsigned long bus, un
if (!dev)
goto error;
- lock_kernel();
switch (len) {
case 1:
cfg_ret = pci_user_read_config_byte(dev, off, &byte);
@@ -47,10 +46,8 @@ sys_pciconfig_read(unsigned long bus, un
break;
default:
err = -EINVAL;
- unlock_kernel();
goto error;
};
- unlock_kernel();
err = -EIO;
if (cfg_ret != PCIBIOS_SUCCESSFUL)
@@ -107,7 +104,6 @@ sys_pciconfig_write(unsigned long bus, u
if (!dev)
return -ENODEV;
- lock_kernel();
switch(len) {
case 1:
err = get_user(byte, (u8 __user *)buf);
@@ -140,7 +136,6 @@ sys_pciconfig_write(unsigned long bus, u
err = -EINVAL;
break;
}
- unlock_kernel();
pci_dev_put(dev);
return err;
}
_
Patches currently in -mm which might be from diego@xxxxxxxxxxxxxxx are
-
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