#include /* validate @native and @pcp counter values match @expected */ #define CHECK(native, pcp, expected) \ do { \ WARN((native) != (expected), \ "raw %ld (0x%lx) != expected %lld (0x%llx)", \ (native), (native), \ (long long)(expected), (long long)(expected)); \ WARN(__this_cpu_read(pcp) != (expected), \ "pcp %ld (0x%lx) != expected %lld (0x%llx)", \ __this_cpu_read(pcp), __this_cpu_read(pcp), \ (long long)(expected), (long long)(expected)); \ } while (0) static DEFINE_PER_CPU(long, long_counter); static DEFINE_PER_CPU(unsigned long, ulong_counter); static int __init percpu_test_init(void) { /* * volatile prevents compiler from optimizing it uses, otherwise the * +ul_one/-ul_one below would replace with inc/dec instructions. */ volatile unsigned int ui_one = 1; long l = 0; unsigned long ul = 0; pr_info("percpu test start\n"); preempt_disable(); l += -1; __this_cpu_add(long_counter, -1); CHECK(l, long_counter, -1); l += 1; __this_cpu_add(long_counter, 1); CHECK(l, long_counter, 0); ul = 0; __this_cpu_write(ulong_counter, 0); ul += 1UL; __this_cpu_add(ulong_counter, 1UL); CHECK(ul, ulong_counter, 1); ul += -1UL; __this_cpu_add(ulong_counter, -1UL); CHECK(ul, ulong_counter, 0); ul += -(unsigned long)1; __this_cpu_add(ulong_counter, -(unsigned long)1); CHECK(ul, ulong_counter, -1); ul = 0; __this_cpu_write(ulong_counter, 0); ul -= 1; __this_cpu_dec(ulong_counter); CHECK(ul, ulong_counter, -1); CHECK(ul, ulong_counter, ULONG_MAX); l += -ui_one; __this_cpu_add(long_counter, -ui_one); CHECK(l, long_counter, 0xffffffff); l += ui_one; __this_cpu_add(long_counter, ui_one); CHECK(l, long_counter, (long)0x100000000LL); l = 0; __this_cpu_write(long_counter, 0); l -= ui_one; __this_cpu_sub(long_counter, ui_one); CHECK(l, long_counter, -1); l = 0; __this_cpu_write(long_counter, 0); l += ui_one; __this_cpu_add(long_counter, ui_one); CHECK(l, long_counter, 1); l += -ui_one; __this_cpu_add(long_counter, -ui_one); CHECK(l, long_counter, (long)0x100000000LL); l = 0; __this_cpu_write(long_counter, 0); l -= ui_one; this_cpu_sub(long_counter, ui_one); CHECK(l, long_counter, -1); CHECK(l, long_counter, ULONG_MAX); ul = 0; __this_cpu_write(ulong_counter, 0); ul += ui_one; __this_cpu_add(ulong_counter, ui_one); CHECK(ul, ulong_counter, 1); ul = 0; __this_cpu_write(ulong_counter, 0); ul -= ui_one; __this_cpu_sub(ulong_counter, ui_one); CHECK(ul, ulong_counter, -1); CHECK(ul, ulong_counter, ULONG_MAX); ul = 3; __this_cpu_write(ulong_counter, 3); ul = this_cpu_sub_return(ulong_counter, ui_one); CHECK(ul, ulong_counter, 2); ul = __this_cpu_sub_return(ulong_counter, ui_one); CHECK(ul, ulong_counter, 1); preempt_enable(); pr_info("percpu test done\n"); return -EAGAIN; /* Fail will directly unload the module */ } static void __exit percpu_test_exit(void) { } module_init(percpu_test_init) module_exit(percpu_test_exit) MODULE_LICENSE("GPL"); MODULE_AUTHOR("Greg Thelen"); MODULE_DESCRIPTION("percpu operations test"); d' value='b5b46c4740aed1538544f0fa849c5b76c7823469'/>
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authorJiri Slaby <jslaby@suse.cz>2017-01-18 14:29:21 +0100
committerIngo Molnar <mingo@kernel.org>2017-01-19 08:39:44 +0100
commitb5b46c4740aed1538544f0fa849c5b76c7823469 (patch)
tree125e7aced4835bad6f6a0c0d02d012f333caf922 /net/mac80211/ieee80211_i.h
parentfa19a769f82fb9a5ca000b83cacd13fcaeda51ac (diff)
objtool: Fix IRET's opcode
The IRET opcode is 0xcf according to the Intel manual and also to objdump of my vmlinux: 1ea8: 48 cf iretq Fix the opcode in arch_decode_instruction(). The previous value (0xc5) seems to correspond to LDS. Signed-off-by: Jiri Slaby <jslaby@suse.cz> Acked-by: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Link: http://lkml.kernel.org/r/20170118132921.19319-1-jslaby@suse.cz Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'net/mac80211/ieee80211_i.h')