Hi Matt Domsch!
On Wed, Feb 02, 2005 at 02:19:14PM -0600, Matt Domsch wrote next:
> On Wed, Feb 02, 2005 at 10:32:28PM +0300, Vasily Averin wrote:
> > >As a hack, one could #define inline /*nothing*/ in megaraid2.h to
> > >avoid this, but it would be nice if the functions could all get
> > >reordered such that inlining works properly, and the need for function
> > >declarations in megaraid2.h would disappear completely.
> >
> >
> > Could you fix it by additional patch? Or you going to prepare a new one?
>
> Here's the hack patch (will apply after yours).
Reorder inline functions
Uninline big mega_cmd_done() function
Signed-off-by: <[EMAIL PROTECTED]>
--- drivers/scsi/megaraid2.c.orig Wed Feb 2 23:30:04 2005
+++ drivers/scsi/megaraid2.c Wed Feb 2 23:57:15 2005
@@ -989,6 +989,268 @@
}
+/**
+ * issue_scb()
+ * @adapter - pointer to our soft state
+ * @scb - scsi control block
+ *
+ * Post a command to the card if the mailbox is available, otherwise return
+ * busy. We also take the scb from the pending list if the mailbox is
+ * available.
+ */
+static inline int
+issue_scb(adapter_t *adapter, scb_t *scb)
+{
+ volatile mbox64_t *mbox64 = adapter->mbox64;
+ volatile mbox_t *mbox = adapter->mbox;
+ unsigned int i = 0;
+
+ if(unlikely(mbox->busy)) {
+ do {
+ udelay(1);
+ i++;
+ } while( mbox->busy && (i < max_mbox_busy_wait) );
+
+ if(mbox->busy) return -1;
+ }
+
+ /* Copy mailbox data into host structure */
+ memcpy((char *)mbox, (char *)scb->raw_mbox, 16);
+
+ mbox->cmdid = scb->idx; /* Set cmdid */
+ mbox->busy = 1; /* Set busy */
+
+
+ /*
+ * Increment the pending queue counter
+ */
+ atomic_inc(&adapter->pend_cmds);
+
+ switch (mbox->cmd) {
+ case MEGA_MBOXCMD_EXTPTHRU:
+ if( !adapter->has_64bit_addr ) break;
+ // else fall through
+ case MEGA_MBOXCMD_LREAD64:
+ case MEGA_MBOXCMD_LWRITE64:
+ case MEGA_MBOXCMD_PASSTHRU64:
+ mbox64->xfer_segment_lo = mbox->xferaddr;
+ mbox64->xfer_segment_hi = 0;
+ mbox->xferaddr = 0xFFFFFFFF;
+ break;
+ default:
+ mbox64->xfer_segment_lo = 0;
+ mbox64->xfer_segment_hi = 0;
+ }
+
+ /*
+ * post the command
+ */
+ scb->state |= SCB_ISSUED;
+
+ if( likely(adapter->flag & BOARD_MEMMAP) ) {
+ mbox->poll = 0;
+ mbox->ack = 0;
+ WRINDOOR(adapter, adapter->mbox_dma | 0x1);
+ }
+ else {
+ irq_enable(adapter);
+ issue_command(adapter);
+ }
+
+ return 0;
+}
+
+
+/**
+ * mega_runpendq()
+ * @adapter - pointer to our soft state
+ *
+ * Runs through the list of pending requests.
+ */
+static inline void
+mega_runpendq(adapter_t *adapter)
+{
+ if(!list_empty(&adapter->pending_list))
+ __mega_runpendq(adapter);
+}
+
+
+static void
+__mega_runpendq(adapter_t *adapter)
+{
+ scb_t *scb;
+ struct list_head *pos, *next;
+
+ /* Issue any pending commands to the card */
+ list_for_each_safe(pos, next, &adapter->pending_list) {
+
+ scb = list_entry(pos, scb_t, list);
+
+ if( !(scb->state & SCB_ISSUED) ) {
+
+ if( issue_scb(adapter, scb) != 0 )
+ return;
+ }
+ }
+
+ return;
+}
+
+
+/**
+ * mega_allocate_scb()
+ * @adapter - pointer to our soft state
+ * @cmd - scsi command from the mid-layer
+ *
+ * Allocate a SCB structure. This is the central structure for controller
+ * commands.
+ */
+static inline scb_t *
+mega_allocate_scb(adapter_t *adapter, Scsi_Cmnd *cmd)
+{
+ struct list_head *head = &adapter->free_list;
+ scb_t *scb;
+
+ /* Unlink command from Free List */
+ if( !list_empty(head) ) {
+
+ scb = list_entry(head->next, scb_t, list);
+
+ list_del_init(head->next);
+
+ scb->state = SCB_ACTIVE;
+ scb->cmd = cmd;
+ scb->dma_type = MEGA_DMA_TYPE_NONE;
+
+ return scb;
+ }
+
+ return NULL;
+}
+
+
+/**
+ * mega_get_ldrv_num()
+ * @adapter - pointer to our soft state
+ * @cmd - scsi mid layer command
+ * @channel - channel on the controller
+ *
+ * Calculate the logical drive number based on the information in scsi command
+ * and the channel number.
+ */
+static inline int
+mega_get_ldrv_num(adapter_t *adapter, Scsi_Cmnd *cmd, int channel)
+{
+ int tgt;
+ int ldrv_num;
+
+ tgt = cmd->target;
+
+ if ( tgt > adapter->this_id )
+ tgt--; /* we do not get inquires for initiator id */
+
+ ldrv_num = (channel * 15) + tgt;
+
+
+ /*
+ * If we have a logical drive with boot enabled, project it first
+ */
+ if( adapter->boot_ldrv_enabled ) {
+ if( ldrv_num == 0 ) {
+ ldrv_num = adapter->boot_ldrv;
+ }
+ else {
+ if( ldrv_num <= adapter->boot_ldrv ) {
+ ldrv_num--;
+ }
+ }
+ }
+
+ /*
+ * If "delete logical drive" feature is enabled on this controller,
+ * the value returned should be 0x80+logical drive id.
+ */
+ if (adapter->support_random_del)
+ ldrv_num += 0x80;
+
+ return ldrv_num;
+}
+
+/*
+ * Wait until the controller's mailbox is available
+ */
+static inline int
+mega_busywait_mbox (adapter_t *adapter)
+{
+ if (adapter->mbox->busy)
+ return __mega_busywait_mbox(adapter);
+ return 0;
+}
+
+
+/**
+ * megaraid_iombox_ack_sequence - interrupt ack sequence for IO mapped HBAs
+ * @adapter - controller's soft state
+ *
+ * Interrupt ackrowledgement sequence for IO mapped HBAs
+ */
+static inline void
+megaraid_iombox_ack_sequence(adapter_t *adapter)
+{
+ u8 status;
+ u8 nstatus;
+ u8 completed[MAX_FIRMWARE_STATUS];
+ u8 byte;
+ int i;
+
+
+ /*
+ * loop till F/W has more commands for us to complete.
+ */
+ do {
+ /* Check if a valid interrupt is pending */
+ byte = irq_state(adapter);
+ if( (byte & VALID_INTR_BYTE) == 0 ) {
+ return;
+ }
+ set_irq_state(adapter, byte);
+
+ while ((nstatus = adapter->mbox->numstatus) == 0xFF) {
+ cpu_relax();
+ }
+ adapter->mbox->numstatus = 0xFF;
+
+ for (i = 0; i < nstatus; i++) {
+ while ((completed[i] = adapter->mbox->completed[i])
+ == 0xFF) {
+ cpu_relax();
+ }
+
+ adapter->mbox->completed[i] = 0xFF;
+ }
+
+ // we must read the valid status now
+ if ((status = adapter->mbox->status) == 0xFF) {
+ printk(KERN_WARNING
+ "megaraid critical: status 0xFF from firmware.\n");
+ }
+ adapter->mbox->status = 0xFF;
+
+ /*
+ * decrement the pending queue counter
+ */
+ atomic_sub(nstatus, &adapter->pend_cmds);
+
+ /* Acknowledge interrupt */
+ irq_ack(adapter);
+
+ mega_cmd_done(adapter, completed, nstatus, status);
+
+ } while(1);
+}
+
+
+
/*
* megaraid_queue()
* @scmd - Issue this scsi command
@@ -1601,145 +1863,6 @@
/**
- * mega_allocate_scb()
- * @adapter - pointer to our soft state
- * @cmd - scsi command from the mid-layer
- *
- * Allocate a SCB structure. This is the central structure for controller
- * commands.
- */
-static inline scb_t *
-mega_allocate_scb(adapter_t *adapter, Scsi_Cmnd *cmd)
-{
- struct list_head *head = &adapter->free_list;
- scb_t *scb;
-
- /* Unlink command from Free List */
- if( !list_empty(head) ) {
-
- scb = list_entry(head->next, scb_t, list);
-
- list_del_init(head->next);
-
- scb->state = SCB_ACTIVE;
- scb->cmd = cmd;
- scb->dma_type = MEGA_DMA_TYPE_NONE;
-
- return scb;
- }
-
- return NULL;
-}
-
-
-/**
- * mega_runpendq()
- * @adapter - pointer to our soft state
- *
- * Runs through the list of pending requests.
- */
-static inline void
-mega_runpendq(adapter_t *adapter)
-{
- if(!list_empty(&adapter->pending_list))
- __mega_runpendq(adapter);
-}
-
-static void
-__mega_runpendq(adapter_t *adapter)
-{
- scb_t *scb;
- struct list_head *pos, *next;
-
- /* Issue any pending commands to the card */
- list_for_each_safe(pos, next, &adapter->pending_list) {
-
- scb = list_entry(pos, scb_t, list);
-
- if( !(scb->state & SCB_ISSUED) ) {
-
- if( issue_scb(adapter, scb) != 0 )
- return;
- }
- }
-
- return;
-}
-
-
-/**
- * issue_scb()
- * @adapter - pointer to our soft state
- * @scb - scsi control block
- *
- * Post a command to the card if the mailbox is available, otherwise return
- * busy. We also take the scb from the pending list if the mailbox is
- * available.
- */
-static inline int
-issue_scb(adapter_t *adapter, scb_t *scb)
-{
- volatile mbox64_t *mbox64 = adapter->mbox64;
- volatile mbox_t *mbox = adapter->mbox;
- unsigned int i = 0;
-
- if(unlikely(mbox->busy)) {
- do {
- udelay(1);
- i++;
- } while( mbox->busy && (i < max_mbox_busy_wait) );
-
- if(mbox->busy) return -1;
- }
-
- /* Copy mailbox data into host structure */
- memcpy((char *)mbox, (char *)scb->raw_mbox, 16);
-
- mbox->cmdid = scb->idx; /* Set cmdid */
- mbox->busy = 1; /* Set busy */
-
-
- /*
- * Increment the pending queue counter
- */
- atomic_inc(&adapter->pend_cmds);
-
- switch (mbox->cmd) {
- case MEGA_MBOXCMD_EXTPTHRU:
- if( !adapter->has_64bit_addr ) break;
- // else fall through
- case MEGA_MBOXCMD_LREAD64:
- case MEGA_MBOXCMD_LWRITE64:
- case MEGA_MBOXCMD_PASSTHRU64:
- mbox64->xfer_segment_lo = mbox->xferaddr;
- mbox64->xfer_segment_hi = 0;
- mbox->xferaddr = 0xFFFFFFFF;
- break;
- default:
- mbox64->xfer_segment_lo = 0;
- mbox64->xfer_segment_hi = 0;
- }
-
- /*
- * post the command
- */
- scb->state |= SCB_ISSUED;
-
- if( likely(adapter->flag & BOARD_MEMMAP) ) {
- mbox->poll = 0;
- mbox->ack = 0;
- WRINDOOR(adapter, adapter->mbox_dma | 0x1);
- }
- else {
- irq_enable(adapter);
- issue_command(adapter);
- }
-
- return 0;
-}
-
-
-/**
* issue_scb_block()
* @adapter - pointer to our soft state
* @raw_mbox - the mailbox
@@ -1807,145 +1930,51 @@
WRINDOOR(adapter, adapter->mbox_dma | 0x2);
while(RDINDOOR(adapter) & 0x2)
- cpu_relax();
- }
- else {
- irq_disable(adapter);
- issue_command(adapter);
-
- while (!((byte = irq_state(adapter)) & INTR_VALID))
- cpu_relax();
-
- status = mbox->status;
- mbox->numstatus = 0xFF;
- mbox->status = 0xFF;
-
- set_irq_state(adapter, byte);
- irq_enable(adapter);
- irq_ack(adapter);
- }
-
- // invalidate the completed command id array. After command
- // completion, firmware would write the valid id.
- for (i = 0; i < MAX_FIRMWARE_STATUS; i++) {
- mbox->completed[i] = 0xFF;
- }
-
- return status;
-
-bug_blocked_mailbox:
- printk(KERN_WARNING "megaraid: Blocked mailbox......!!\n");
- udelay (1000);
- return -1;
-}
-
-
-/**
- * megaraid_isr_iomapped()
- * @irq - irq
- * @devp - pointer to our soft state
- * @regs - unused
- *
- * Interrupt service routine for io-mapped controllers.
- * Find out if our device is interrupting. If yes, acknowledge the interrupt
- * and service the completed commands.
- */
-static void
-megaraid_isr_iomapped(int irq, void *devp, struct pt_regs *regs)
-{
- adapter_t *adapter = devp;
- unsigned long flags;
-
-
- spin_lock_irqsave(adapter->host_lock, flags);
-
- megaraid_iombox_ack_sequence(adapter);
-
- /* Loop through any pending requests */
- if( atomic_read(&adapter->quiescent ) == 0) {
- mega_runpendq(adapter);
- }
-
- spin_unlock_irqrestore(adapter->host_lock, flags);
-
- return;
-}
-
-
-/**
- * megaraid_iombox_ack_sequence - interrupt ack sequence for IO mapped HBAs
- * @adapter - controller's soft state
- *
- * Interrupt ackrowledgement sequence for IO mapped HBAs
- */
-static inline void
-megaraid_iombox_ack_sequence(adapter_t *adapter)
-{
- u8 status;
- u8 nstatus;
- u8 completed[MAX_FIRMWARE_STATUS];
- u8 byte;
- int i;
-
-
- /*
- * loop till F/W has more commands for us to complete.
- */
- do {
- /* Check if a valid interrupt is pending */
- byte = irq_state(adapter);
- if( (byte & VALID_INTR_BYTE) == 0 ) {
- return;
- }
- set_irq_state(adapter, byte);
-
- while ((nstatus = adapter->mbox->numstatus) == 0xFF) {
- cpu_relax();
- }
- adapter->mbox->numstatus = 0xFF;
-
- for (i = 0; i < nstatus; i++) {
- while ((completed[i] = adapter->mbox->completed[i])
- == 0xFF) {
- cpu_relax();
- }
-
- adapter->mbox->completed[i] = 0xFF;
- }
+ cpu_relax();
+ }
+ else {
+ irq_disable(adapter);
+ issue_command(adapter);
- // we must read the valid status now
- if ((status = adapter->mbox->status) == 0xFF) {
- printk(KERN_WARNING
- "megaraid critical: status 0xFF from firmware.\n");
- }
- adapter->mbox->status = 0xFF;
+ while (!((byte = irq_state(adapter)) & INTR_VALID))
+ cpu_relax();
- /*
- * decrement the pending queue counter
- */
- atomic_sub(nstatus, &adapter->pend_cmds);
+ status = mbox->status;
+ mbox->numstatus = 0xFF;
+ mbox->status = 0xFF;
- /* Acknowledge interrupt */
+ set_irq_state(adapter, byte);
+ irq_enable(adapter);
irq_ack(adapter);
+ }
- mega_cmd_done(adapter, completed, nstatus, status);
+ // invalidate the completed command id array. After command
+ // completion, firmware would write the valid id.
+ for (i = 0; i < MAX_FIRMWARE_STATUS; i++) {
+ mbox->completed[i] = 0xFF;
+ }
- } while(1);
+ return status;
+
+bug_blocked_mailbox:
+ printk(KERN_WARNING "megaraid: Blocked mailbox......!!\n");
+ udelay (1000);
+ return -1;
}
/**
- * megaraid_isr_memmapped()
+ * megaraid_isr_iomapped()
* @irq - irq
* @devp - pointer to our soft state
* @regs - unused
*
- * Interrupt service routine for memory-mapped controllers.
+ * Interrupt service routine for io-mapped controllers.
* Find out if our device is interrupting. If yes, acknowledge the interrupt
* and service the completed commands.
*/
static void
-megaraid_isr_memmapped(int irq, void *devp, struct pt_regs *regs)
+megaraid_isr_iomapped(int irq, void *devp, struct pt_regs *regs)
{
adapter_t *adapter = devp;
unsigned long flags;
@@ -1953,10 +1982,10 @@
spin_lock_irqsave(adapter->host_lock, flags);
- megaraid_memmbox_ack_sequence(adapter);
+ megaraid_iombox_ack_sequence(adapter);
/* Loop through any pending requests */
- if(atomic_read(&adapter->quiescent) == 0) {
+ if( atomic_read(&adapter->quiescent ) == 0) {
mega_runpendq(adapter);
}
@@ -2034,6 +2063,37 @@
/**
+ * megaraid_isr_memmapped()
+ * @irq - irq
+ * @devp - pointer to our soft state
+ * @regs - unused
+ *
+ * Interrupt service routine for memory-mapped controllers.
+ * Find out if our device is interrupting. If yes, acknowledge the interrupt
+ * and service the completed commands.
+ */
+static void
+megaraid_isr_memmapped(int irq, void *devp, struct pt_regs *regs)
+{
+ adapter_t *adapter = devp;
+ unsigned long flags;
+
+
+ spin_lock_irqsave(adapter->host_lock, flags);
+
+ megaraid_memmbox_ack_sequence(adapter);
+
+ /* Loop through any pending requests */
+ if(atomic_read(&adapter->quiescent) == 0) {
+ mega_runpendq(adapter);
+ }
+
+ spin_unlock_irqrestore(adapter->host_lock, flags);
+
+ return;
+}
+
+/**
* mega_cmd_done()
* @adapter - pointer to our soft state
* @completed - array of ids of completed commands
@@ -2042,7 +2102,7 @@
*
* Complete the comamnds and call the scsi mid-layer callback hooks.
*/
-static inline void
+static void
mega_cmd_done(adapter_t *adapter, u8 completed[], int nstatus, int status)
{
mega_ext_passthru *epthru = NULL;
@@ -2344,18 +2404,6 @@
list_add(&scb->list, &adapter->free_list);
}
-
-/*
- * Wait until the controller's mailbox is available
- */
-static inline int
-mega_busywait_mbox (adapter_t *adapter)
-{
- if (adapter->mbox->busy)
- return __mega_busywait_mbox(adapter);
- return 0;
-}
-
static int
__mega_busywait_mbox (adapter_t *adapter)
{
@@ -2513,6 +2561,43 @@
enquiry3->pdrv_state[i] = inquiry->pdrv_info.pdrv_state[i];
}
+static inline void
+mega_free_sgl(adapter_t *adapter)
+{
+ scb_t *scb;
+ int i;
+
+ for(i = 0; i < adapter->max_cmds; i++) {
+
+ scb = &adapter->scb_list[i];
+
+ if( scb->sgl64 ) {
+ pci_free_consistent(adapter->dev,
+ sizeof(mega_sgl64) * adapter->sglen,
+ scb->sgl64,
+ scb->sgl_dma_addr);
+
+ scb->sgl64 = NULL;
+ }
+
+ if( scb->pthru ) {
+ pci_free_consistent(adapter->dev, sizeof(mega_passthru),
+ scb->pthru, scb->pthru_dma_addr);
+
+ scb->pthru = NULL;
+ }
+
+ if( scb->epthru ) {
+ pci_free_consistent(adapter->dev,
+ sizeof(mega_ext_passthru),
+ scb->epthru, scb->epthru_dma_addr);
+
+ scb->epthru = NULL;
+ }
+
+ }
+}
+
/*
* Release the controller's resources
@@ -2650,44 +2735,6 @@
return 0;
}
-static inline void
-mega_free_sgl(adapter_t *adapter)
-{
- scb_t *scb;
- int i;
-
- for(i = 0; i < adapter->max_cmds; i++) {
-
- scb = &adapter->scb_list[i];
-
- if( scb->sgl64 ) {
- pci_free_consistent(adapter->dev,
- sizeof(mega_sgl64) * adapter->sglen,
- scb->sgl64,
- scb->sgl_dma_addr);
-
- scb->sgl64 = NULL;
- }
-
- if( scb->pthru ) {
- pci_free_consistent(adapter->dev, sizeof(mega_passthru),
- scb->pthru, scb->pthru_dma_addr);
-
- scb->pthru = NULL;
- }
-
- if( scb->epthru ) {
- pci_free_consistent(adapter->dev,
- sizeof(mega_ext_passthru),
- scb->epthru, scb->epthru_dma_addr);
-
- scb->epthru = NULL;
- }
-
- }
-}
-
-
/*
* Get information about the card/driver
*/
@@ -3153,6 +3200,26 @@
return len;
}
+/**
+ * mega_allocate_inquiry()
+ * @dma_handle - handle returned for dma address
+ * @pdev - handle to pci device
+ *
+ * allocates memory for inquiry structure
+ */
+static inline caddr_t
+mega_allocate_inquiry(dma_addr_t *dma_handle, struct pci_dev *pdev)
+{
+ return pci_alloc_consistent(pdev, sizeof(mega_inquiry3), dma_handle);
+}
+
+
+static inline void
+mega_free_inquiry(caddr_t inquiry, dma_addr_t dma_handle, struct pci_dev *pdev)
+{
+ pci_free_consistent(pdev, sizeof(mega_inquiry3), inquiry, dma_handle);
+}
+
/**
* proc_rebuild_rate()
@@ -5112,55 +5179,6 @@
}
-
-/**
- * mega_get_ldrv_num()
- * @adapter - pointer to our soft state
- * @cmd - scsi mid layer command
- * @channel - channel on the controller
- *
- * Calculate the logical drive number based on the information in scsi command
- * and the channel number.
- */
-static inline int
-mega_get_ldrv_num(adapter_t *adapter, Scsi_Cmnd *cmd, int channel)
-{
- int tgt;
- int ldrv_num;
-
- tgt = cmd->target;
-
- if ( tgt > adapter->this_id )
- tgt--; /* we do not get inquires for initiator id */
-
- ldrv_num = (channel * 15) + tgt;
-
-
- /*
- * If we have a logical drive with boot enabled, project it first
- */
- if( adapter->boot_ldrv_enabled ) {
- if( ldrv_num == 0 ) {
- ldrv_num = adapter->boot_ldrv;
- }
- else {
- if( ldrv_num <= adapter->boot_ldrv ) {
- ldrv_num--;
- }
- }
- }
-
- /*
- * If "delete logical drive" feature is enabled on this controller,
- * the value returned should be 0x80+logical drive id.
- */
- if (adapter->support_random_del)
- ldrv_num += 0x80;
-
- return ldrv_num;
-}
-
-
/**
* mega_reorder_hosts()
*
@@ -5374,26 +5392,6 @@
return 0;
}
-
-/**
- * mega_allocate_inquiry()
- * @dma_handle - handle returned for dma address
- * @pdev - handle to pci device
- *
- * allocates memory for inquiry structure
- */
-static inline caddr_t
-mega_allocate_inquiry(dma_addr_t *dma_handle, struct pci_dev *pdev)
-{
- return pci_alloc_consistent(pdev, sizeof(mega_inquiry3), dma_handle);
-}
-
-
-static inline void
-mega_free_inquiry(caddr_t inquiry, dma_addr_t dma_handle, struct pci_dev *pdev)
-{
- pci_free_consistent(pdev, sizeof(mega_inquiry3), inquiry, dma_handle);
-}
/** mega_internal_dev_inquiry()
--- drivers/scsi/megaraid2.h.orig Wed Feb 2 23:30:04 2005
+++ drivers/scsi/megaraid2.h Wed Feb 2 23:49:09 2005
@@ -1128,7 +1128,7 @@
u32 *buffer, u32 *length);
static inline int mega_busywait_mbox (adapter_t *);
static int __mega_busywait_mbox (adapter_t *);
-static inline void mega_cmd_done(adapter_t *, u8 [], int, int);
+static void mega_cmd_done(adapter_t *, u8 [], int, int);
static inline void mega_free_sgl (adapter_t *adapter);
static void mega_8_to_40ld (mraid_inquiry *inquiry,
mega_inquiry3 *enquiry3, mega_product_info *);
--
Best regards, TEMHOTA-RIPN aka MJA13-RIPE
System Administrator. mailto:[EMAIL PROTECTED]
-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to [EMAIL PROTECTED]
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
