exec: Rename exec-vary.c as page-vary.c

exec-vary.c is about variable page size handling,
rename it page-vary.c. Currently this file is target
specific (built once for each target), comment this.

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20210322112427.4045204-2-f4bug@amsat.org>
[rth: Update MAINTAINERS]
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

MAINTAINERS

@@ -117,6 +117,7 @@ R: Paolo Bonzini <pbonzini@redhat.com>
 S: Maintained
 F: softmmu/cpus.c
 F: cpus-common.c
+F: page-vary.c
 F: accel/tcg/
 F: accel/stubs/tcg-stub.c
 F: util/cacheinfo.c

meson.build

@@ -1933,7 +1933,6 @@ subdir('softmmu')
 
 common_ss.add(capstone)
 specific_ss.add(files('cpu.c', 'disas.c', 'gdbstub.c'), capstone)
-specific_ss.add(files('exec-vary.c'))
 specific_ss.add(when: 'CONFIG_TCG', if_true: files(
   'fpu/softfloat.c',
   'tcg/optimize.c',
@@ -1945,6 +1944,8 @@ specific_ss.add(when: 'CONFIG_TCG', if_true: files(
 ))
 specific_ss.add(when: 'CONFIG_TCG_INTERPRETER', if_true: files('tcg/tci.c'))
 
+specific_ss.add(files('page-vary.c'))
+
 subdir('backends')
 subdir('disas')
 subdir('migration')

page-vary.c

@@ -1,5 +1,5 @@
 /*
- * Variable page size handling
+ * Variable page size handling -- target specific part.
  *
  *  Copyright (c) 2003 Fabrice Bellard
  *