linux-toradex.git/scripts/checksyscalls.sh, branch v4.13-rc5

kbuild: speed up checksyscalls.sh

2017-06-09T16:15:36+00:00

checksyscalls.sh is run at every "make" run while building the kernel,
even if no files have changed. I looked at where we spend time in
a trivial empty rebuild and found checksyscalls.sh to be a source
of noticeable overhead, as it spawns a lot of child processes just
to call 'cat' copying from stdin to stdout, once for each of the
over 400 x86 syscalls.

Using a shell-builtin (echo) instead of the external command gives
us a 13x speedup:

    Before		   After
real	0m1.018s       real	0m0.077s
user	0m0.068s       user	0m0.048s
sys	0m0.156s       sys	0m0.024s

The time it took to rebuild a single file on my machine dropped
from 5.5 seconds to 4.5 seconds.

Signed-off-by: Arnd Bergmann 
Signed-off-by: Masahiro Yamada

x86/syscalls/32: Ignore arch_prctl for other architectures

2017-03-24T13:13:55+00:00

sys_arch_prctl is only provided on x86, and there is no reason
to add it elsewhere. However, including it on the 32-bit syscall
table caused a warning for most configurations on non-x86:

:1328:2: warning: #warning syscall arch_prctl not implemented [-Wcpp]

This adds an exception to the syscall table checking script.

Fixes: 79170fda313e ("x86/syscalls/32: Wire up arch_prctl on x86-32")
Signed-off-by: Arnd Bergmann 
Cc: Kyle Huey 
Link: http://lkml.kernel.org/r/20170323151904.706286-1-arnd@arndb.de
Signed-off-by: Thomas Gleixner

x86/asm/entry: Move the arch/x86/syscalls/ definitions to arch/x86/entry/syscalls/

2015-06-04T05:37:37+00:00

The build time generated syscall definitions are entry code related, move
them into the arch/x86/entry/ directory.

Cc: Borislav Petkov 
Cc: H. Peter Anvin 
Cc: Linus Torvalds 
Cc: Thomas Gleixner 
Cc: Andy Lutomirski 
Cc: Denys Vlasenko 
Cc: Brian Gerst 
Cc: Peter Zijlstra 
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar

scripts/checksyscalls.sh: Make renameat optional

2014-05-20T08:59:38+00:00

The new renameat2 syscall provides all the functionality of renameat
with an additional flags argument, so make renameat optional so that
future architectures can omit it without getting a warning.

This patch doesn't affect existing architectures.

Signed-off-by: James Hogan 
Acked-by: Arnd Bergmann 
Signed-off-by: Miklos Szeredi 
Cc: linux-arch@vger.kernel.org

checksyscalls: fix "here document" handling

2012-09-25T15:59:21+00:00

"echo" doesn't read from stdin, therefore the checksyscalls script didn't
warn about not implemented system calls anymore since 29dc54c6
("checksyscalls: Use arch/x86/syscalls/syscall_32.tbl as source").

Use "cat" instead of "echo" which handles this correctly.

Signed-off-by: Heiko Carstens 
Cc: Michal Marek 
Cc: H. Peter Anvin 
Cc: Cyrill Gorcunov 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

checksyscalls: Use arch/x86/syscalls/syscall_32.tbl as source

2011-11-17T21:35:37+00:00

Use the new arch/x86/syscalls/syscall_32.tbl file as source instead of
arch/x86/include/asm/unistd_32.h.

Cc: Michal Marek 
Cc: Geert Uytterhoeven 
Cc: Sam Ravnborg 
Signed-off-by: H. Peter Anvin

checksyscalls: Fix stand-alone usage

2010-12-20T14:40:33+00:00

The usage help in the comments
  - refers to the wrong script name,
  - doesn't mention that $srctree must be set.

Hence correct the script name, and derive the source tree path from the script
path, so we no longer need to rely on $srctree being set by the caller.

Signed-off-by: Geert Uytterhoeven 
Acked-by: Sam Ravnborg 
Signed-off-by: Michal Marek

Add wait4() back to the set of syscalls.

2010-06-25T18:54:16+00:00

The initial pass at the generic ABI assumed that wait4() could be
easily expressed using waitid().  Although it's true that wait4()
can be built on waitid(), it's awkward enough that it makes more
sense to continue to include wait4 in the generic syscall ABI.

Since there is already a deprecated wait4 in the ABI, this change
converts that wait4 into old_wait, and puts wait4 in the next
available slot for new supported syscalls, after the platform-specific
syscalls at number 260.

Signed-off-by: Chris Metcalf 
Acked-by: Arnd Bergmann

asm-generic: add a generic unistd.h

2009-06-11T19:02:16+00:00

A new architecture should only define a minimal set of system
calls while still providing the full functionality. This version
of unistd.h has gone through intensive review to make sure that
by default it only enables syscalls that do not already have
a more featureful replacement.

It is modeled after the x86-64 version of unistd.h, which unifies
the syscall number definition and the actual system call table
in a single file, in order to keep them synchronized much more
easily.

This first version still keeps legacy system call definitions
around, guarded by various #ifdefs, and with numbers larger
than 1024. The idea behind this is to make it easier for
new architectures to transition from a full list to the reduced
set. In particular, the new microblaze architecture that should
migrate to using the generic ABI headers can at least use an
existing uClibc source tree without major rewrites during the
conversion.

Signed-off-by: Arnd Bergmann

scripts/checksyscalls.sh: fix for non-gnu sed

2008-10-29T21:02:08+00:00

Make the checksyscalls script work even on systems where sed is non-gnu.

Signed-off-by: Andrew Morton 
Signed-off-by: Sam Ravnborg