RE: [patch 001/445] include/linux/smp.h:on_each_cpu(): switch back to a macro

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Please excuse the top posting, but weren't these issues resolved weeks ago?

Why switch back to a macro if there is no problem?

David Daney
________________________________________
From: akpm@xxxxxxxxxxxxxxxxxxxx [akpm@xxxxxxxxxxxxxxxxxxxx]
Sent: Wednesday, July 03, 2013 3:00 PM
To: torvalds@xxxxxxxxxxxxxxxxxxxx
Cc: akpm@xxxxxxxxxxxxxxxxxxxx; david.daney@xxxxxxxxxx; geert@xxxxxxxxxxxxxx; ralf@xxxxxxxxxxxxxx; sfr@xxxxxxxxxxxxxxxx; stable@xxxxxxxxxxxxxxx
Subject: [patch 001/445] include/linux/smp.h:on_each_cpu(): switch back to a macro

From: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Subject: include/linux/smp.h:on_each_cpu(): switch back to a macro

f21afc25f9ed4 ("smp.h: Use local_irq_{save,restore}() in !SMP version of
on_each_cpu()") converted on_each_cpu() to a C function.  This required
inclusion of irqflags.h, which broke ia64 and mn10300 (at least) due to
header ordering hell.

Switch on_each_cpu() back to a macro to fix this.

Reported-by: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
Acked-by: Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>
Cc: David Daney <david.daney@xxxxxxxxxx>
Cc: Ralf Baechle <ralf@xxxxxxxxxxxxxx>
Cc: Stephen Rothwell <sfr@xxxxxxxxxxxxxxxx>
Cc: <stable@xxxxxxxxxxxxxxx>    [3.10.x]
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---

 include/linux/smp.h |   20 ++++++++------------
 1 file changed, 8 insertions(+), 12 deletions(-)

diff -puN include/linux/smp.h~include-linux-smph-on_each_cpu-switch-back-to-a-macro include/linux/smp.h
--- a/include/linux/smp.h~include-linux-smph-on_each_cpu-switch-back-to-a-macro
+++ a/include/linux/smp.h
@@ -11,7 +11,6 @@
 #include <linux/list.h>
 #include <linux/cpumask.h>
 #include <linux/init.h>
-#include <linux/irqflags.h>

 extern void cpu_idle(void);

@@ -140,17 +139,14 @@ static inline int up_smp_call_function(s
 }
 #define smp_call_function(func, info, wait) \
                        (up_smp_call_function(func, info))
-
-static inline int on_each_cpu(smp_call_func_t func, void *info, int wait)
-{
-       unsigned long flags;
-
-       local_irq_save(flags);
-       func(info);
-       local_irq_restore(flags);
-       return 0;
-}
-
+#define on_each_cpu(func, info, wait)          \
+       ({                                      \
+               unsigned long __flags;          \
+               local_irq_save(__flags);        \
+               func(info);                     \
+               local_irq_restore(__flags);     \
+               0;                              \
+       })
 /*
  * Note we still need to test the mask even for UP
  * because we actually can get an empty mask from
_

--
To unsubscribe from this list: send the line "unsubscribe stable" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html




[Index of Archives]     [Linux Kernel]     [Kernel Development Newbies]     [Linux USB Devel]     [Video for Linux]     [Linux Audio Users]     [Yosemite Hiking]     [Linux Kernel]     [Linux SCSI]