linux.git/arch/sparc, branch v4.19 Linux kernel source tree sparc: vDSO: Silence an uninitialized variable warning 2018-10-18T04:55:02+00:00 Dan Carpenter dan.carpenter@oracle.com 2018-10-13T10:26:53+00:00 62d6f3b7b85e9ba79c96bfd36f501f180908e623 Smatch complains that "val" would be uninitialized if kstrtoul() fails. Fixes: 9a08862a5d2e ("vDSO for sparc") Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com> Signed-off-by: David S. Miller <davem@davemloft.net> 
Smatch complains that "val" would be uninitialized if kstrtoul() fails.

Fixes: 9a08862a5d2e ("vDSO for sparc")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
sparc: Fix syscall fallback bugs in VDSO. 2018-10-18T04:29:23+00:00 David S. Miller davem@davemloft.net 2018-10-18T04:28:01+00:00 776ca1543b5fe673aaf1beb244fcc2429d378083 First, the trap number for 32-bit syscalls is 0x10. Also, only negate the return value when syscall error is indicated by the carry bit being set. Signed-off-by: David S. Miller <davem@davemloft.net> 
First, the trap number for 32-bit syscalls is 0x10.

Also, only negate the return value when syscall error is indicated by
the carry bit being set.

Signed-off-by: David S. Miller <davem@davemloft.net>
Revert "sparc: Convert to using %pOFn instead of device_node.name" 2018-10-16T01:32:54+00:00 David S. Miller davem@davemloft.net 2018-10-16T01:32:54+00:00 a06ecbfe784ceb22e56ae3cd75fe77138e7cfa0b This reverts commit 0b9871a3a8cc7234c285b5d9bf66cc6712cfee7c. Causes crashes with qemu, interacts badly with commit commit 6d0a70a284be ("vsprintf: print OF node name using full_name") etc. Reported-by: Guenter Roeck <linux@roeck-us.net> Signed-off-by: David S. Miller <davem@davemloft.net> 
This reverts commit 0b9871a3a8cc7234c285b5d9bf66cc6712cfee7c.

Causes crashes with qemu, interacts badly with commit commit
6d0a70a284be ("vsprintf: print OF node name using full_name")
etc.

Reported-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
sparc64: Set %l4 properly on trap return after handling signals. 2018-10-15T03:22:28+00:00 David S. Miller davem@davemloft.net 2018-10-15T03:22:28+00:00 d1f1f98c6d1708a90436e1a3b2aff5e93946731b If we did some signal processing, we have to reload the pt_regs tstate register because it's value may have changed. In doing so we also have to extract the %pil value contained in there anre load that into %l4. This value is at bit 20 and thus needs to be shifted down before we later write it into the %pil register. Most of the time this is harmless as we are returning to userspace and the %pil is zero for that case. Signed-off-by: David S. Miller <davem@davemloft.net> 
If we did some signal processing, we have to reload the pt_regs
tstate register because it's value may have changed.

In doing so we also have to extract the %pil value contained in there
anre load that into %l4.

This value is at bit 20 and thus needs to be shifted down before we
later write it into the %pil register.

Most of the time this is harmless as we are returning to userspace
and the %pil is zero for that case.

Signed-off-by: David S. Miller <davem@davemloft.net>
sparc64: Make proc_id signed. 2018-10-15T03:19:31+00:00 David S. Miller davem@davemloft.net 2018-10-15T03:19:31+00:00 b3e1eb8e7ac9aaa283989496651d99267c4cad6c So that when it is unset, ie. '-1', userspace can see it properly. Signed-off-by: David S. Miller <davem@davemloft.net> 
So that when it is unset, ie. '-1', userspace can see it
properly.

Signed-off-by: David S. Miller <davem@davemloft.net>
sparc: Throttle perf events properly. 2018-10-12T17:33:20+00:00 David S. Miller davem@davemloft.net 2018-10-12T17:33:20+00:00 455adb3174d2c8518cef1a61140c211f6ac224d2 Like x86 and arm, call perf_sample_event_took() in perf event NMI interrupt handler. Signed-off-by: David S. Miller <davem@davemloft.net> 
Like x86 and arm, call perf_sample_event_took() in perf event
NMI interrupt handler.

Signed-off-by: David S. Miller <davem@davemloft.net>
sparc: Fix single-pcr perf event counter management. 2018-10-12T17:31:58+00:00 David S. Miller davem@davemloft.net 2018-10-12T17:31:58+00:00 cfdc3170d214046b9509183fe9b9544dc644d40b It is important to clear the hw->state value for non-stopped events when they are added into the PMU. Otherwise when the event is scheduled out, we won't read the counter because HES_UPTODATE is still set. This breaks 'perf stat' and similar use cases, causing all the events to show zero. This worked for multi-pcr because we make explicit sparc_pmu_start() calls in calculate_multiple_pcrs(). calculate_single_pcr() doesn't do this because the idea there is to accumulate all of the counter settings into the single pcr value. So we have to add explicit hw->state handling there. Like x86, we use the PERF_HES_ARCH bit to track truly stopped events so that we don't accidently start them on a reload. Related to all of this, sparc_pmu_start() is missing a userpage update so add it. Signed-off-by: David S. Miller <davem@davemloft.net> 
It is important to clear the hw->state value for non-stopped events
when they are added into the PMU.  Otherwise when the event is
scheduled out, we won't read the counter because HES_UPTODATE is still
set.  This breaks 'perf stat' and similar use cases, causing all the
events to show zero.

This worked for multi-pcr because we make explicit sparc_pmu_start()
calls in calculate_multiple_pcrs().  calculate_single_pcr() doesn't do
this because the idea there is to accumulate all of the counter
settings into the single pcr value.  So we have to add explicit
hw->state handling there.

Like x86, we use the PERF_HES_ARCH bit to track truly stopped events
so that we don't accidently start them on a reload.

Related to all of this, sparc_pmu_start() is missing a userpage update
so add it.

Signed-off-by: David S. Miller <davem@davemloft.net>
sparc: Wire up io_pgetevents system call. 2018-10-09T23:52:38+00:00 David S. Miller davem@davemloft.net 2018-10-09T23:52:38+00:00 7c26701a77ec4569d9054b334d70724a06ad62f9 Signed-off-by: David S. Miller <davem@davemloft.net> 
Signed-off-by: David S. Miller <davem@davemloft.net>
sparc64: fix fall-through annotation 2018-10-08T05:42:02+00:00 Gustavo A. R. Silva gustavo@embeddedor.com 2018-10-02T10:19:54+00:00 b7dc10b64f6190a008f05baf697d4d8fa9b8ed51 Replace "fallthru" with a proper "fall through" annotation. This fix is part of the ongoing efforts to enabling -Wimplicit-fallthrough Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com> Signed-off-by: David S. Miller <davem@davemloft.net> 
Replace "fallthru" with a proper "fall through" annotation.

This fix is part of the ongoing efforts to enabling
-Wimplicit-fallthrough

Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
sparc32: fix fall-through annotation 2018-10-08T05:42:02+00:00 Gustavo A. R. Silva gustavo@embeddedor.com 2018-10-02T10:15:17+00:00 c4beb225f93a2fdaffbe2a610eccb0f6c86b3e45 Replace "fallthru" with a proper "fall through" annotation. This fix is part of the ongoing efforts to enabling -Wimplicit-fallthrough Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com> Signed-off-by: David S. Miller <davem@davemloft.net> 
Replace "fallthru" with a proper "fall through" annotation.

This fix is part of the ongoing efforts to enabling
-Wimplicit-fallthrough

Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
Signed-off-by: David S. Miller <davem@davemloft.net>