tree 58ba7676eda0b3eaa30884327047bd77e2c3a553
parent 9e78a13bfb1640c058fde9dabfd386b942539018
author Heiko Carstens <heiko.carstens@de.ibm.com> 1294822524 +0100
committer Martin Schwidefsky <sky@mschwide.boeblingen.de.ibm.com> 1294822524 +0100

[S390] vdso: dont map at mmap_base

The vdso object is currently always mapped with mm->mmap_base used as
requested address. In case of flexible mmap layout this means it gets
mapped above mmap_base and therefore potentially stealing a bit of
address space that is reserved for the stack.
In case of flexible mmap layout the object should be mapped below
mmap base. For legacy mmap layout above.
To fix this just don't request any specific address and let the mmap
code figure out an address that fits.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>