]> git.baikalelectronics.ru Git - kernel.git/commit
sparc64: Fix bootup regressions on some Kconfig combinations.
authorDavid S. Miller <davem@davemloft.net>
Wed, 27 Apr 2016 21:27:37 +0000 (17:27 -0400)
committerDavid S. Miller <davem@davemloft.net>
Wed, 27 Apr 2016 21:27:37 +0000 (17:27 -0400)
commit7fc7015ef238a8d41e19af29ab42d364af7c7ded
treebd144e692b2db745318d3fd11c0e53217787766d
parentc82ae95f5509a8c029e4c12540f1bd2a8a33163e
sparc64: Fix bootup regressions on some Kconfig combinations.

The system call tracing bug fix mentioned in the Fixes tag
below increased the amount of assembler code in the sequence
of assembler files included by head_64.S

This caused to total set of code to exceed 0x4000 bytes in
size, which overflows the expression in head_64.S that works
to place swapper_tsb at address 0x408000.

When this is violated, the TSB is not properly aligned, and
also the trap table is not aligned properly either.  All of
this together results in failed boots.

So, do two things:

1) Simplify some code by using ba,a instead of ba/nop to get
   those bytes back.

2) Add a linker script assertion to make sure that if this
   happens again the build will fail.

Fixes: 5e24c7c30f28 ("sparc: Fix system call tracing register handling.")
Reported-by: Meelis Roos <mroos@linux.ee>
Reported-by: Joerg Abraham <joerg.abraham@nokia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
arch/sparc/kernel/cherrs.S
arch/sparc/kernel/fpu_traps.S
arch/sparc/kernel/head_64.S
arch/sparc/kernel/misctrap.S
arch/sparc/kernel/spiterrs.S
arch/sparc/kernel/utrap.S
arch/sparc/kernel/vmlinux.lds.S
arch/sparc/kernel/winfixup.S