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authorPaul Mackerras <paulus@samba.org>2009-07-02 08:57:12 +1000
committerIngo Molnar <mingo@elte.hu>2009-07-03 14:42:39 +0200
commit8e049ef054f1cc765f05f13e1396bb9a17c19e66 (patch)
tree99a8879e1415bf4c6ceaa0eb6a3372fa8842b908 /fs/namei.c
parent199e23780a7e75c63a9e3d1108804e3af450ea3e (diff)
x86: atomic64: Code atomic(64)_read and atomic(64)_set in C not CPP
Occasionally we get bugs where atomic_read or atomic_set are used on atomic64_t variables or vice versa. These bugs don't generate warnings on x86 because atomic_read and atomic_set are coded as macros rather than C functions, so we don't get any type-checking on their arguments; similarly for atomic64_read and atomic64_set in 64-bit kernels. This converts them to C functions so that the arguments are type-checked and bugs like this will get caught more easily. It also converts atomic_cmpxchg and atomic_xchg, and atomic64_cmpxchg and atomic64_xchg on 64-bit, so we get type-checking on their arguments too. Compiling a typical 64-bit x86 config, this generates no new warnings, and the vmlinux text is 86 bytes smaller. Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Mike Galbraith <efault@gmx.de> Cc: Arnaldo Carvalho de Melo <acme@redhat.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: David Howells <dhowells@redhat.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Arnd Bergmann <arnd@arndb.de> LKML-Reference: <alpine.LFD.2.01.0907021653030.3210@localhost.localdomain> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'fs/namei.c')
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