xv6-65oo2/kernel/spinlock.h

// Mutual exclusion lock.
struct spinlock {
  uint locked;       // Is the lock held?

  // For debugging:
  char *name;        // Name of lock.
  struct cpu *cpu;   // The cpu holding the lock.
  struct cpu *last_release;
  uint64 last_pc;
};
Revert "Introduce and use sleeplocks instead of BUSY flags" My changes have a race with re-used bufs and the code doesn't seem to get shorter Keep the changes that fixed ip->off race This reverts commit 3a5fa7ed9020eaf8ab843a16d26db7393b2ec072. Conflicts: defs.h file.c file.h 2011-08-29 21:18:40 +00:00			`// Mutual exclusion lock.`
cvs add spinlock.h fix race in schedule() 2006-07-12 09:10:25 +00:00			`struct spinlock {`
assorted fixes: * rename c/cp to cpu/proc * rename cpu.context to cpu.scheduler * fix some comments * formatting for printout 2009-08-31 06:02:08 +00:00			`uint locked; // Is the lock held?`
Remove trailing white space with: for f in .{h,c}; do sed -i .sed 's/[[:blank:]]$//' $f; done (Thanks to Nicolás Wolovick) 2016-08-25 13:13:00 +00:00
more comments 2006-09-07 14:12:30 +00:00			`// For debugging:`
assorted fixes: * rename c/cp to cpu/proc * rename cpu.context to cpu.scheduler * fix some comments * formatting for printout 2009-08-31 06:02:08 +00:00			`char *name; // Name of lock.`
			`struct cpu *cpu; // The cpu holding the lock.`
Avoid two cores selecting the same process to run 2019-07-02 17:40:33 +00:00			`struct cpu *last_release;`
			`uint64 last_pc;`
cvs add spinlock.h fix race in schedule() 2006-07-12 09:10:25 +00:00			`};`
clumsy blank pages to make some files align better 2007-08-28 05:00:39 +00:00