Changeset 43b7b35 in mainline for kernel/arch/amd64

Timestamp:

2008-08-31T19:54:09Z (17 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

82b72e40

Parents:

bf29fe5

Message:

Prevent 'tmp' in amd64's atomic_lock_arch() from being allocated
to the same register as 'val→count'.

File:

• kernel/arch/amd64/include/atomic.h (modified) (2 diffs)

kernel/arch/amd64/include/atomic.h

@@ -109 +109 @@
                 "mov %0, %1\n"
                 "testq %1, %1\n"
-                "jnz 0b\n"       /* Lightweight looping on locked spinlock */
+                "jnz 0b\n"       /* lightweight looping on locked spinlock */
                 
                 "incq %1\n"      /* now use the atomic operation */
@@ -115 +115 @@
                 "testq %1, %1\n"
                 "jnz 0b\n"
-                : "+m" (val->count), "=r"(tmp)
+                : "+m" (val->count), "=&r" (tmp)
         );
         /*