Gitweb:     
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=6344f0521aac9f93c312826216762f2185268390
Commit:     6344f0521aac9f93c312826216762f2185268390
Parent:     35b5f6b1a82b5c586e0b24c711dc6ba944e88ef1
Author:     Mark Brown <[EMAIL PROTECTED]>
AuthorDate: Sun Jan 27 13:58:11 2008 +0000
Committer:  David S. Miller <[EMAIL PROTECTED]>
CommitDate: Sun Feb 3 04:28:42 2008 -0800

    natsemi: Update locking documentation
    
    The documentation regarding synchronisation at the head of the natsemi
    driver was badly bitrotted so replace it with a general statement about
    the techniques used which is less likely to bitrot.
    
    Also remove the note saying these chips are uncommon - it makes little
    difference but they were used in a number of laptops and at least one mass
    market PCI ethernet card.
    
    Signed-off-by: Mark Brown <[EMAIL PROTECTED]>
    Signed-off-by: Jeff Garzik <[EMAIL PROTECTED]>
    Signed-off-by: David S. Miller <[EMAIL PROTECTED]>
---
 drivers/net/natsemi.c |   18 ++----------------
 1 files changed, 2 insertions(+), 16 deletions(-)

diff --git a/drivers/net/natsemi.c b/drivers/net/natsemi.c
index c329a4f..0a3e604 100644
--- a/drivers/net/natsemi.c
+++ b/drivers/net/natsemi.c
@@ -203,22 +203,8 @@ skbuff at an offset of "+2", 16-byte aligning the IP 
header.
 IIId. Synchronization
 
 Most operations are synchronized on the np->lock irq spinlock, except the
-performance critical codepaths:
-
-The rx process only runs in the interrupt handler. Access from outside
-the interrupt handler is only permitted after disable_irq().
-
-The rx process usually runs under the netif_tx_lock. If np->intr_tx_reap
-is set, then access is permitted under spin_lock_irq(&np->lock).
-
-Thus configuration functions that want to access everything must call
-       disable_irq(dev->irq);
-       netif_tx_lock_bh(dev);
-       spin_lock_irq(&np->lock);
-
-IV. Notes
-
-NatSemi PCI network controllers are very uncommon.
+recieve and transmit paths which are synchronised using a combination of
+hardware descriptor ownership, disabling interrupts and NAPI poll scheduling.
 
 IVb. References
 
-
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