Eric Lee / smarc-ti-linux-kernel

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Commit e044b25aa519a8a997f5669ff11e96dc2fe9ac42

Authored by James Hogan
Committed by Greg Kroah-Hartman
1 parent b20909f107
Exists in smarct4x-processor-sdk-linux-03.00.00.04 and in 2 other branches dlt-processor-sdk-linux-03.00.00.04, smarct3x-processor-sdk-linux-03.00.00.04

SIGNAL: Move generic copy_siginfo() to signal.h 

commit ca9eb49aa9562eaadf3cea071ec7018ad6800425 upstream.

The generic copy_siginfo() is currently defined in
asm-generic/siginfo.h, after including uapi/asm-generic/siginfo.h which
defines the generic struct siginfo. However this makes it awkward for an
architecture to use it if it has to define its own struct siginfo (e.g.
MIPS and potentially IA64), since it means that asm-generic/siginfo.h
can only be included after defining the arch-specific siginfo, which may
be problematic if the arch-specific definition needs definitions from
uapi/asm-generic/siginfo.h.

It is possible to work around this by first including
uapi/asm-generic/siginfo.h to get the constants before defining the
arch-specific siginfo, and include asm-generic/siginfo.h after. However
uapi headers can't be included by other uapi headers, so that first
include has to be in an ifdef __kernel__, with the non __kernel__ case
including the non-UAPI header instead.

Instead of that mess, move the generic copy_siginfo() definition into
linux/signal.h, which allows an arch-specific uapi/asm/siginfo.h to
include asm-generic/siginfo.h and define the arch-specific siginfo, and
for the generic copy_siginfo() to see that arch-specific definition.

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Petr Malat <oss@malat.biz>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: Christopher Ferris <cferris@google.com>
Cc: linux-arch@vger.kernel.org
Cc: linux-mips@linux-mips.org
Cc: linux-ia64@vger.kernel.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/12478/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Showing 2 changed files with 15 additions and 15 deletions Side-by-side Diff

include/asm-generic/siginfo.h
Diff comments   View file @ e044b25
... ... @@ -17,21 +17,6 @@
17 17 struct siginfo;
18 18 void do_schedule_next_timer(struct siginfo *info);
19 19  
20   -#ifndef HAVE_ARCH_COPY_SIGINFO
21   -
22   -#include <linux/string.h>
23   -
24   -static inline void copy_siginfo(struct siginfo *to, struct siginfo *from)
25   -{
26   - if (from->si_code < 0)
27   - memcpy(to, from, sizeof(*to));
28   - else
29   - /* _sigchld is currently the largest know union member */
30   - memcpy(to, from, __ARCH_SI_PREAMBLE_SIZE + sizeof(from->_sifields._sigchld));
31   -}
32   -
33   -#endif
34   -
35 20 extern int copy_siginfo_to_user(struct siginfo __user *to, const struct siginfo *from);
36 21  
37 22 #endif
include/linux/signal.h
Diff comments   View file @ e044b25
... ... @@ -28,6 +28,21 @@
28 28 sigset_t signal;
29 29 };
30 30  
  31 +#ifndef HAVE_ARCH_COPY_SIGINFO
  32 +
  33 +#include <linux/string.h>
  34 +
  35 +static inline void copy_siginfo(struct siginfo *to, struct siginfo *from)
  36 +{
  37 + if (from->si_code < 0)
  38 + memcpy(to, from, sizeof(*to));
  39 + else
  40 + /* _sigchld is currently the largest know union member */
  41 + memcpy(to, from, __ARCH_SI_PREAMBLE_SIZE + sizeof(from->_sifields._sigchld));
  42 +}
  43 +
  44 +#endif
  45 +
31 46 /*
32 47 * Define some primitives to manipulate sigset_t.
33 48 */