Understanding the Linux Kernel, 2nd Edition
by Marco Cesati, Daniel P. Bovet

The following errata were *corrected* in the 6/04 reprint:

Here's a key to the markup:
	[page-number]: serious technical mistake
	{page-number}: minor technical mistake
	<page-number>: important language/formatting problem
	(page-number): language change or minor formatting problem



{3}, line 2: 
"SVR4"
 
NOW READS: 
"SVR2" 


{24}  2nd line from the bottom;
"is greater than or equal to 0"

NOW READS:
"is less than or equal to"



{36}  8th and 7th line from the bottom (3rd bullet item);
    "A 20-bit limit field that denotes the segment length in bytes
    (segments that have a Limit field equal to zero are
    considered null). When G is set to zero, the size of a
    non-null segment ..."

NOW READS:
    "A 20-bit limit field that binds the segment length. When G
    is set to zero, the size of a segment ..."




{50}  last sentence;
    "The Page Size Extension (PSE) flag in the cr4 control register
    enables large page sizes (2 MB when PAE is enabled)."

NOW READS:
    "The Page Size (PS) flag in the page directory entry enables
    large page sizes (2 MB when PAE is enabled)."



{56}  9th line from the bottom (first sentence of "PMD_SHIFT" item);
"Middle Directory" HAS BEEN REPLACED by  "Offset"



{57}  3rd paragraph, 2nd sentence;
"They are 32-bit data types, except for pte_t, which is a 64-bit data type when PAE is enabled
and a 32-bit data type otherwise."

NOW READS:
"They are 32-bit data types when PAE is disabled, and 64-bit data types when PAE is enabled."



{65}  3rd numbered item;
"flush_tlb_all()"

NOW READS:
"__flush_tlb_all()"



{67}  2nd line from the top;
"0xe8000000"

NOW READS:
"0xf8000000"



{79}  4th paragraph;
The words "referenced by the first element of the task array" HAVE BEEN REMOVED.



{160}, 2nd paragraph, 1st line
     "the ebx register stores the address of the parent's
     process descriptor;"

NOW READS:
     "the ebx register stores the address of the descriptor
     of the process being replaced by the child (usually,
     the parent's process descriptor);"




{166}  Table 5-3, description of "atomic_clear_mask(mask, addr)" and "atomic_set_mask(mask, addr)";

"addr" NOW READS "*addr" (two occurrences)




{169}  Table 5-5, entry "spin_is_locked()";
  "Return 0 if the spin lock is set to 1 (unlocked); 0 otherwise"

NOW READS:
  "Return 0 if the spin lock is set to 1 (unlocked); 1 otherwise"


{183}  16th line from the bottom;
The sentence "In fact, recall that the do_softirq() function refuses to execute the softirqs when
the global_irq_lock spin lock is closed"  HAS BEEN DELETED.



{188}  2nd paragraph;
The whole paragraph starting with "Notice that ..." HAS BEEN DELETED.