[libc] revert all process_mrelease changes (#118650)

Revert as its test is unstable.
https://github.com/llvm/llvm-project/issues/118057

4 files changed, 1 insertions, 79 deletions

diff --git a/libc/src/sys/mman/CMakeLists.txt b/libc/src/sys/mman/CMakeLists.txt
index 281efc0ffcdf..4d4c2ad37605 100644
--- a/libc/src/sys/mman/CMakeLists.txt
+++ b/libc/src/sys/mman/CMakeLists.txt
@@ -113,9 +113,3 @@ add_entrypoint_object(
   DEPENDS
     .${LIBC_TARGET_OS}.mremap
 )
-
-add_entrypoint_object(
-  process_mrelease 
-  ALIAS 
-  DEPENDS
-    .${LIBC_TARGET_OS}.process_mrelease)
diff --git a/libc/src/sys/mman/linux/CMakeLists.txt b/libc/src/sys/mman/linux/CMakeLists.txt
index aa2ca4b16018..89a0ad1527a0 100644
--- a/libc/src/sys/mman/linux/CMakeLists.txt
+++ b/libc/src/sys/mman/linux/CMakeLists.txt
@@ -36,6 +36,7 @@ add_entrypoint_object(
     libc.src.__support.OSUtil.osutil
     libc.src.errno.errno
 )
+
 add_entrypoint_object(
   munmap
   SRCS
@@ -213,14 +214,3 @@ add_entrypoint_object(
     libc.src.unistd.unlink
     .shm_common
 )
-
-add_entrypoint_object(
-  process_mrelease
-  SRCS
-    process_mrelease.cpp
-  HDRS
-    ../process_mrelease.h
-  DEPENDS
-    libc.include.sys_syscall
-    libc.src.__support.OSUtil.osutil
-    libc.src.errno.errno)
diff --git a/libc/src/sys/mman/linux/process_mrelease.cpp b/libc/src/sys/mman/linux/process_mrelease.cpp
deleted file mode 100644
index 7660f1e23ece..000000000000
--- a/libc/src/sys/mman/linux/process_mrelease.cpp
+++ /dev/null
@@ -1,41 +0,0 @@
-//===---------- Linux implementation of the mrelease function -----------===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===----------------------------------------------------------------------===//
-
-#include "src/sys/mman/process_mrelease.h"
-
-#include "src/__support/OSUtil/syscall.h" // For internal syscall function.
-#include "src/__support/common.h"
-
-#include "src/__support/macros/config.h"
-#include "src/errno/libc_errno.h"
-#include <linux/param.h> // For EXEC_PAGESIZE.
-#include <sys/syscall.h> // For syscall numbers.
-
-namespace LIBC_NAMESPACE_DECL {
-
-LLVM_LIBC_FUNCTION(int, process_mrelease, (int pidfd, unsigned int flags)) {
-#ifdef SYS_process_mrelease
-  long ret =
-      LIBC_NAMESPACE::syscall_impl<int>(SYS_process_mrelease, pidfd, flags);
-
-  if (ret < 0) {
-    libc_errno = static_cast<int>(-ret);
-    return -1;
-  }
-
-  return 0;
-#else
-  // The system call is not available.
-  (void)pidfd;
-  (void)flags;
-  libc_errno = ENOSYS;
-  return -1;
-#endif
-}
-
-} // namespace LIBC_NAMESPACE_DECL
diff --git a/libc/src/sys/mman/process_mrelease.h b/libc/src/sys/mman/process_mrelease.h
deleted file mode 100644
index 6c800f2d0eab..000000000000
--- a/libc/src/sys/mman/process_mrelease.h
+++ /dev/null
@@ -1,21 +0,0 @@
-//===-- Implementation header for process_mrelease function -*- C++ -*-===//
-//
-// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
-// See https://llvm.org/LICENSE.txt for license information.
-// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
-//
-//===------------------------------------------------------------------===//
-
-#ifndef LLVM_LIBC_SRC_SYS_MMAN_PROCESS_MRELEASE_H
-#define LLVM_LIBC_SRC_SYS_MMAN_PROCESS_MRELEASE_H
-
-#include "src/__support/macros/config.h"
-#include <sys/mman.h> // For size_t and off_t
-
-namespace LIBC_NAMESPACE_DECL {
-
-int process_mrelease(int pidfd, unsigned int flags);
-
-} // namespace LIBC_NAMESPACE_DECL
-
-#endif // LLVM_LIBC_SRC_SYS_MMAN_PROCESS_MRELEASE_H