Skip to content
  1. Mar 23, 2010
    • Anton Blanchard's avatar
      ppc64 sys_ipc breakage in 2.6.34-rc2 · 45575f5a
      Anton Blanchard authored 
      I chased down a fail on ppc64 on 2.6.34-rc2 where an application that
uses shared memory was getting a SEGV.

Commit baed7fc9

 ("Add generic sys_ipc
wrapper") changed the second argument from an unsigned long to an int.
When we call shmget the system call wrappers for sys_ipc will sign
extend second (ie the size) which truncates it.  It took a while to
track down because the call succeeds and strace shows the untruncated
size :)

The patch below changes second from an int to an unsigned long which
fixes shmget on ppc64 (and I assume s390, sparc64 and mips64).

Signed-off-by: default avatarAnton Blanchard <anton@samba.org>
--

I assume the function prototypes for the other IPC methods would cause us
to sign or zero extend second where appropriate (avoiding any security
issues). Come to think of it, the syscall wrappers for each method should do
that for us as well.
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      45575f5a
    • Rafael J. Wysocki's avatar
      x86 / perf: Fix suspend to RAM on HP nx6325 · a90110c6
      Rafael J. Wysocki authored 
      Commit 3f6da390


(perf: Rework and fix the arch CPU-hotplug hooks) broke suspend to
RAM on my HP nx6325 (and most likely on other AMD-based boxes too)
by allowing amd_pmu_cpu_offline() to be executed for CPUs that are
going offline as part of the suspend process.  The problem is that
cpuhw->amd_nb may be NULL already, so the function should make sure
it's not NULL before accessing the object pointed to by it.

Signed-off-by: default avatarRafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      a90110c6
  3. Mar 20, 2010
  5. Mar 19, 2010