On 05/10/13 12:35, Andrew Morton wrote: > On Fri, 10 May 2013 15:24:17 -0400 Dave Jones <da...@redhat.com> wrote: > >> On Fri, May 10, 2013 at 12:14:54PM -0700, Andrew Morton wrote: >> >> > [ 163.953629] Call Trace: >> > [ 163.957706] [<ffffffff812be322>] ipcget+0x182/0x380 >> > [ 163.962123] [<ffffffff810b99a5>] ?trace_hardirqs_on_caller+0x115/0x1e0 >> > [ 163.966752] [<ffffffff812c559a>] SyS_shmget+0x5a/0x60 >> > [ 163.971163] [<ffffffff812c47e0>] ? shm_close+0x140/0x140 >> > [ 163.975590] [<ffffffff812c3e60>] ? shm_release+0x50/0x50 >> > [ 163.979991] [<ffffffff812c3df0>] ? shm_get_unmapped_area+0x20/0x20 >> > [ 163.984499] [<ffffffff816caa14>] tracesys+0xdd/0xe2 >> >> This has been bugging me for a while. >> What's changing sys_shmget to SyS_shmget in that trace ? And why ? >> > > nm vmlinux | grep SyS > > That's the actual name of the function definition which the C compiler > sees. It's emitted by SYSCALL_DEFINE, cooked up by all the macro goop > in include/linux/syscalls.h. > > I forget who did this initially and peeling back those layers with git > is tiresome. > --
$ git blame include/linux/syscalls.h | grep SyS | more 07fe6e00 (Al Viro 2013-01-21 15:03:44 -0500 189) asmlinka ge long SyS##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \ 6c597963 (Heiko Carstens 2009-02-11 13:04:38 -0800 196) SYSCALL_ ALIAS(sys##name, SyS##name); Those 2 commits explain (to some degree) what the patches do, but not why "SyS". -- ~Randy -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
