metag build error in -next due to 'fs, elf: drop MAP_FIXED usage from elf_map'

[Guenter Roeck <linux@roeck-us.net>]

The following build error is seen when building metag:meta2_defconfig
or metag:tz1090_defconfig.

arch/metag/kernel/process.c: In function '__metag_elf_map':
arch/metag/kernel/process.c:421: error: 'tsk' undeclared

Bisect results attached.

Guenter

---
# bad: [990b6a07d18cb30a66db3d18ab7d953806237e6a] Add linux-next specific files for 20180105
# good: [30a7acd573899fd8b8ac39236eff6468b195ac7d] Linux 4.15-rc6
git bisect start 'HEAD' 'v4.15-rc6'
# good: [4411e1d8bfc93afafc74548669d772750432e0b7] Merge remote-tracking branch 'crypto/master'
git bisect good 4411e1d8bfc93afafc74548669d772750432e0b7
# good: [fcdad798ac60727fc0a90c36815d19b1629e45a4] Merge remote-tracking branch 'devicetree/for-next'
git bisect good fcdad798ac60727fc0a90c36815d19b1629e45a4
# good: [fe14c29e6d6772e5fc7bb8dc7a7568ce6a887a8e] Merge remote-tracking branch 'staging/staging-next'
git bisect good fe14c29e6d6772e5fc7bb8dc7a7568ce6a887a8e
# good: [b8be2479df7dda35d0d73fafa3f1d9c95c6a89b6] Merge remote-tracking branch 'gpio/for-next'
git bisect good b8be2479df7dda35d0d73fafa3f1d9c95c6a89b6
# bad: [76248405844bf17c0620aea2f0e5bb751fc680b3] lib/stackdepot.c: use a non-instrumented version of memcmp()
git bisect bad 76248405844bf17c0620aea2f0e5bb751fc680b3
# good: [b852120f0251533f414c35396f151d2ddd4d3bde] mm: get 7% more pages in a pagevec
git bisect good b852120f0251533f414c35396f151d2ddd4d3bde
# bad: [2b7030305a472bd15268818282e37818eec2386b] userfaultfd: convert to use anon_inode_getfd()
git bisect bad 2b7030305a472bd15268818282e37818eec2386b
# bad: [b7ebb7ed4b3c8ed9fac1ccb0f32ff3e94e697176] mm, mmu_notifier: annotate mmu notifiers with blockable invalidate callbacks
git bisect bad b7ebb7ed4b3c8ed9fac1ccb0f32ff3e94e697176
# good: [d37faf4a02f9bda96fe637e50fdf880e789f8468] mm: do not lose dirty and accessed bits in pmdp_invalidate()
git bisect good d37faf4a02f9bda96fe637e50fdf880e789f8468
# bad: [b8093f6e4db920936a51e161c2c208e7327c073f] mm: don't use the same value for MAP_FIXED_NOREPLACE and MAP_SYNC
git bisect bad b8093f6e4db920936a51e161c2c208e7327c073f
# good: [d3d42f1481dd877a66577c4c406c18d386ea55f0] mm: introduce MAP_FIXED_NOREPLACE
git bisect good d3d42f1481dd877a66577c4c406c18d386ea55f0
# bad: [7847968573148a5645d53a73ea26c0f4b168d7bb] fs, elf: drop MAP_FIXED usage from elf_map
git bisect bad 7847968573148a5645d53a73ea26c0f4b168d7bb
# good: [cea5c2e4296daaf5d9eec338382a85159d1d4a7f] mm-introduce-map_fixed_safe-fix
git bisect good cea5c2e4296daaf5d9eec338382a85159d1d4a7f
# first bad commit: [7847968573148a5645d53a73ea26c0f4b168d7bb] fs, elf: drop MAP_FIXED usage from elf_map